[Full-disclosure] Cisco Security Advisory: Cisco IOS Information Leakage Using IPv6 Routing Header




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Cisco Security Advisory:
Cisco IOS Information Leakage Using IPv6 Routing Header

Advisory ID: cisco-sa-20070808-IOS-IPv6-leak

http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml

Revision 1.0

For Public Release 2007 August 08 1600 UTC (GMT)

- -----------------------------------------------------------------------

Summary
=======

Cisco IOS and Cisco IOS XR contain a vulnerability when processing
specially crafted IPv6 packets with a Type 0 Routing Header present.
Exploitation of this vulnerability can lead to information leakage on
affected IOS and IOS XR devices, and may also result in a crash of the
affected IOS device. Successful exploitation on an affected device
running Cisco IOS XR will not result in a crash of the device itself,
but may result in a crash of the IPv6 subsystem.

Cisco has made free software available to address this vulnerability
for affected customers. There are workarounds available to mitigate the
effects of the vulnerability.

This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml.

Note: The August 08, 2007 publication includes four Security Advisories
and one Security Response. The advisories all affect IOS, one
additionally affects Cisco Unified Communications Manager as well. Each
advisory lists the releases that correct the vulnerability described in
the advisory, and the advisories also detail the releases that correct
the vulnerabilities in all four advisories. Individual publication
links are listed below:

* Cisco IOS Information Leakage Using IPv6 Routing Header
http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml
* Cisco IOS Next Hop Resolution Protocol Vulnerability
http://www.cisco.com/warp/public/707/cisco-sa-20070808-nhrp.shtml
* Cisco IOS Secure Copy Authorization Bypass Vulnerability
http://www.cisco.com/warp/public/707/cisco-sa-20070808-scp.shtml
* Voice Vulnerabilities in Cisco IOS and Cisco Unified Communications Manager
http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-voice.shtml
* Cisco Unified MeetingPlace XSS Vulnerability
http://www.cisco.com/warp/public/707/cisco-sr-20070808-mp.shtml

Affected Products
=================

Vulnerable Products
+------------------

This vulnerability affects devices that are configured to use the IPv6
protocol and are running affected versions of one of the following
types of software:

* Cisco IOS
* Cisco IOS XR

To determine the software running on a Cisco IOS product, log in to the
device and issue the show version command to display the system banner.
Cisco IOS software will identify itself as "Internetwork Operating
System Software" or simply "IOS." On the next line of output, the image
name will be displayed between parentheses, followed by "Version" and
the Cisco IOS release name. Other Cisco devices will not have the show
version command, or will give different output.

The following example shows output from a device running an IOS image:

Router>show version
Cisco IOS Software, 7200 Software (C7200-IK9S-M), Version 12.3(14)T1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Thu 31-Mar-05 08:04 by yiyan


Additional information about Cisco IOS release naming is available at
the following link:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_white_paper09186a008018305e.shtml.

To determine whether IPv6 is configured on an IOS device, look for the
lines containing ipv6 in the Cisco IOS configuration, as shown in the
following example:

Router#show running-config | include ipv6
ipv6 address 2001:0DB8:C18:1::/64 eui-64


If the configuration contains a line or lines similar to the above
example, IPv6 is configured on the device. The exact IPv6 address will
vary in your configuration.

To determine whether IPv6 is configured on an IOS XR device, look for
the following lines in in the Cisco IOS XR configuration:

Router-IOS_XR#show ipv6 interface | include IPv6
IPv6 is enabled, link-local address is fe80::216:47ff:fee1:d987
IPv6 is disabled, link-local address unassigned
IPv6 is disabled, link-local address unassigned


If the output contains at least one line that reads IPv6 is enabled,
IPv6 is configured on the device.

Products Confirmed Not Vulnerable
+--------------------------------

No other Cisco products are currently known to be affected by this
vulnerability. In particular, the following devices are known not to be
affected:

* Cisco PIX and ASA Appliances
* Cisco Firewall Services Module (FWSM)
* Cisco MDS

Cisco PIX, ASA, and FWSM firewall products do not process packets
containing IPv6 Routing headers. All such packets will be silently
dropped.

Details
=======

Successful exploitation of the vulnerability described in this document
may result in swapping memory between the destination IPv6 address in
the IPv6 packet header and 16 bytes from the packet buffer memory.
Memory that can be accessed through this vulnerability can not be
further than 1500 bytes from the packet header start.

This vulnerability is documented for Cisco IOS as Cisco Bug ID
CSCef77013 and for Cisco IOS XR as Cisco Bug ID CSCsi74127.

Vulnerability Scoring Details
+----------------------------

Cisco is providing scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 1.0.

Cisco will provide a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of the
vulnerability in individual networks.

Cisco PSIRT will set the bias in all cases to normal. Customers are
encouraged to apply the bias parameter when determining the
environmental impact of a particular vulnerability.

CVSS is a standards based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided an FAQ to answer additional questions regarding CVSS
at http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html.

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss.

CSCef77013 - Tighter parameter checking for IPv6

CVSS Base Score - 8
Access Vector - Remote
Access Complexity - Low
Authentication - Not Required
Confidentiality Impact - Partial
Integrity Impact - Partial
Availability Impact - Complete
Impact Bias - Normal

CVSS Temporal Score - 6.6
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed


CSCsi74127 - Processing of IPv6 headers

CVSS Base Score - 7
Access Vector - Remote
Access Complexity - Low
Authentication - Not Required
Confidentiality Impact - Partial
Integrity Impact - Partial
Availability Impact - Partial
Impact Bias - Normal

CVSS Temporal Score - 5.8
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed

Impact
======

Successful exploitation of this vulnerability may result in the
swapping of memory between the destination IPv6 address field and
packet buffer memory. This can lead to the leakage of data from the
buffer memory in the form of an IPv6 destination address and, in a
worst case scenario for devices running Cisco IOS, a complete crash of
the IOS device.

Note: Given that the destination IPv6 address will contain the contents
of a buffer memory, the packet may not get routed outside of the local
network. Depending on the exact destination address the packet may get
dropped by the next router or on the targeted router itself if it does
not have route to the newly formed IPv6 address.

In the case of Cisco IOS XR, successful exploitation will not crash the
whole device but only lead to a restart of the IPv6 subsystem.
Successful repeated exploitation of this vulnerability may lead to a
sustained denial of service (DoS) of all upper layer services that use
IPv6 as the transport protocol but not the whole device.

Software Versions and Fixes
===========================

When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center ("TAC") or your contracted
maintenance provider for assistance.

Each row of the Cisco IOS software table (below) names a Cisco IOS
release train. If a given release train is vulnerable, then the
earliest possible releases that contain the fix (along with the
anticipated date of availability for each, if applicable) are listed in
the "First Fixed Release" column of the table. The "Recommended
Release" column indicates the releases which have fixes for all the
published vulnerabilities at the time of this Advisory. A device
running a release in the given train that is earlier than the release
in a specific column (less than the First Fixed Release) is known to be
vulnerable. Cisco recommends upgrading to a release equal to or later
than the release in the "Recommended Releases" column of the table.

For further information about how Cisco IOS is built, numbered and
maintained, please see the following URL:
http://www.cisco.com/warp/public/620/1.html

+-------------------------------------------------------------+
| Major | Availability of Repaired Releases |
| Release | |
|--------------+----------------------------------------------|
| Affected | | Recommended |
| 12.0-Based | First Fixed Release | Release |
| Release | | |
|--------------+-----------------------------+----------------|
| 12.0 | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0DA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0DB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0DC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | 12.0(32)S8; available | 12.0(32)S8; |
| 12.0S | 21-Aug-07 | available |
| | | 21-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.0SC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0SL | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0SP | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.0(32)S8; |
| 12.0ST | 12.0(32)S8 available | available |
| | 21-Aug-07 | 21-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.0(32)S8; |
| 12.0SX | 12.0(32)S8 available | available |
| | 21-Aug-07 | 21-Aug-07 |
|--------------+-----------------------------+----------------|
| | 12.0(32)SY4; available | 12.0(32)SY4; |
| 12.0SY | 21-Aug-07 | available |
| | | 21-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | |
| 12.0SZ | 12.0(32)S8 available | |
| | 21-Aug-07 | |
|--------------+-----------------------------+----------------|
| 12.0T | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0W | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0WC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0WT | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XD | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XF | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XG | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XH | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XI | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XJ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XK | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XL | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XM | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XN | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XQ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XR | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XS | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XV | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.0XW | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| Affected | | Recommended |
| 12.1-Based | First Fixed Release | Release |
| Release | | |
|--------------+-----------------------------+----------------|
| 12.1 | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1AA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1AX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1AY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1AZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1CX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1DA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1DB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1DC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1E | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EO | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EU | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EV | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EW | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1EZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1GA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1GB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1T | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XD | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XF | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XG | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XH | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XI | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XJ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XK | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XL | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XM | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XN | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XO | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XP | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XQ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XR | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XS | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XT | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.1XU | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.1XV | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.1XW | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1XZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.1YB | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.1YC | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.1YD | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.1YE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YF | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YG | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YH | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YI | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.1YJ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| Affected | | Recommended |
| 12.2-Based | First Fixed Release | Release |
| Release | | |
|--------------+-----------------------------+----------------|
| 12.2 | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2B | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(17b)BC8 |
| 12.2BC | 12.3(17a)BC | |
| | | 12.3(21a)BC3 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2BW | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2BY | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.2BZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(17b)BC8 |
| 12.2CX | 12.3(17a)BC | |
| | | 12.3(21a)BC3 |
|--------------+-----------------------------+----------------|
| 12.2CY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2CZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2DA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2DD | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2DX | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | All Cat4K |
| | | platforms: |
| | | |
| | | 12.2(25)EWA10 |
| | | |
| 12.2EU | Vulnerable; first fixed in | 12.2(31)SGA3 |
| | 12.2(25)EWA10 | |
| | | 12.2(37)SG1 |
| | | |
| | | 12.2(40)SG; |
| | | available |
| | | Oct-07 |
|--------------+-----------------------------+----------------|
| | | All Cat4K |
| | | platforms: |
| | | |
| | | 12.2(25)EWA10 |
| | | |
| 12.2EW | Vulnerable; first fixed in | 12.2(31)SGA3 |
| | 12.2(25)EWA10 | |
| | | 12.2(37)SG1 |
| | | |
| | | 12.2(40)SG; |
| | | available |
| | | Oct-07 |
|--------------+-----------------------------+----------------|
| | | All Cat4K |
| | | platforms: |
| | | |
| | | 12.2(25)EWA10 |
| | | |
| 12.2EWA | 12.2(25)EWA10 | 12.2(31)SGA3 |
| | | |
| | | 12.2(37)SG1 |
| | | |
| | | 12.2(40)SG; |
| | | available |
| | | Oct-07 |
|--------------+-----------------------------+----------------|
| 12.2EX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2EY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)SEE4; |
| 12.2EZ | 12.2(25)SEE4 | available |
| | | 07-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2FX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2FY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.2(40)SE; |
| | | available |
| | Vulnerable; first fixed in | 24-Aug-07 |
| 12.2FZ | 12.2(35)SE | |
| | | 12.2(37)SE1 |
| | | |
| | | 12.2(35)SE5 |
|--------------+-----------------------------+----------------|
| 12.2IXA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2IXB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2IXC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2IXD | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2JA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2JK | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2MB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | 12.2(15)MC2h | |
| 12.2MC | | 12.2(15)MC2j |
| | 12.2(15)MC2j | |
|--------------+-----------------------------+----------------|
| | 12.2(14)S18 | |
| | | |
| | 12.2(18)S13 | |
| | | 12.2(25)S13 |
| 12.2S | 12.2(20)S14 | |
| | | 12.2(14)S19 |
| | 12.2(25)S13 | |
| | | |
| | 12.2(30)S | |
|--------------+-----------------------------+----------------|
| 12.2SB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SBC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)SEE4; |
| 12.2SEA | 12.2(25)SEE4 | available |
| | | 07-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)SEE4; |
| 12.2SEB | 12.2(25)SEE4 | available |
| | | 07-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)SEE4; |
| 12.2SEC | 12.2(25)SEE4 | available |
| | | 07-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)SEE4; |
| 12.2SED | 12.2(25)SEE4 | available |
| | | 07-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2SEE | 12.2(25)SEE4 | 12.2(25)SEE4 |
|--------------+-----------------------------+----------------|
| 12.2SEF | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SEG | 12.2(25)SEG3 | 12.2(25)SEG3 |
|--------------+-----------------------------+----------------|
| | 12.2(25)SG2; available | All Cat4K |
| | 13-Aug-07 | platforms: |
| | | |
| | 12.2(31)SG1 | 12.2(25)SG2 |
| | | |
| 12.2SG | 12.2(31)SG | 12.2(37)SG1 |
| | | |
| | 12.2(37)SG | 12.2(31)SG2 |
| | | |
| | 12.2(40)SG; available | 12.2(40)SG; |
| | 24-Oct-07 | available |
| | | Oct-07 |
|--------------+-----------------------------+----------------|
| 12.2SGA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SL | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SM | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SO | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SRA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SRB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2SU | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | 12.2(27)SV2 | |
| | | |
| | 12.2(27)SV3 | |
| | | |
| | 12.2(27)SV1 | |
| | | 12.2(29)SV4; |
| 12.2SV | 12.2(28)SV1 | available |
| | | 14-Oct-07 |
| | 12.2(29)SV | |
| | | |
| | 12.2(29a)SV | |
| | | |
| | 12.2(29b)SV | |
|--------------+-----------------------------+----------------|
| 12.2SVA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SVC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SW | 12.2(25)SW11 | 12.2(25)SW11 |
|--------------+-----------------------------+----------------|
| 12.2SX | Vulnerable; first fixed in | |
| | 12.2(18)SXE | |
|--------------+-----------------------------+----------------|
| 12.2SXA | Vulnerable; first fixed in | |
| | 12.2(18)SXE | |
|--------------+-----------------------------+----------------|
| 12.2SXB | Vulnerable; first fixed in | 12.2(18)SXF10 |
| | 12.2(18)SXE | |
|--------------+-----------------------------+----------------|
| 12.2SXD | Vulnerable; contact TAC | |
|--------------+-----------------------------+----------------|
| 12.2SXE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SXF | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SXH | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2SY | Vulnerable; first fixed in | |
| | 12.2(18)SXE | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)S13 |
| 12.2SZ | 12.2(30)S | |
| | | 12.2(14)S19 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2T | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2TPC | 12.2(8)TPC10c; available | 12.2(8)TPC10c |
| | 17-Aug-07 | |
|--------------+-----------------------------+----------------|
| 12.2UZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2VZ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XA | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XB | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2XC | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XD | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2XE | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(17b)BC8 |
| 12.2XF | 12.3(17a)BC | |
| | | 12.3(21a)BC3 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XG | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XH | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XI | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XJ | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XK | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XL | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XM | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XN | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XQ | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2XR | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2XS | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XT | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XU | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XV | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2XW | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YA | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YB | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2YC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YD | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)S13 |
| 12.2YE | 12.2(30)S | |
| | | 12.2(14)S19 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YF | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2YG | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YH | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YJ | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.2YK | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YL | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YM | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YN | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.2YO | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2YP | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YQ | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YR | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.2YS | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2YT | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YU | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YV | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YW | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YX | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2YY | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.2(25)S13 |
| 12.2YZ | 12.2(30)S | |
| | | 12.2(14)S19 |
|--------------+-----------------------------+----------------|
| 12.2ZA | Vulnerable; first fixed in | |
| | 12.2(18)SXE | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2ZB | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.2ZC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2ZD | Vulnerable; contact TAC | |
|--------------+-----------------------------+----------------|
| | | 12.3(23) |
| | | |
| | | 12.3(20a) |
| | | |
| | | 12.3(21b) |
| | | |
| | | 12.3(22a) |
| | Vulnerable; first fixed in | |
| 12.2ZE | 12.3(15) | 12.3(18a) |
| | | |
| | | 12.3(19a); |
| | | available |
| | | 16-Aug-07 |
| | | |
| | | 12.3(17c); |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2ZF | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.2ZG | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2ZH | 12.2(13)ZH9; available | 12.2(13)ZH9 |
| | 17-Aug-07 | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.2ZJ | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | Vulnerable, first fixed in | |
| | 12.3(14)T for the Cisco | |
| | 17xx; | |
| | | |
| 12.2ZL | first fixed in 12.4(1) for | |
| | the Cisco 3200; | |
| | | |
| | first fixed in 12.3(7)XR7, | |
| | available 13-Aug-07 for the | |
| | ICS7750 | |
|--------------+-----------------------------+----------------|
| 12.2ZP | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2ZR | Vulnerable; contact TAC | |
|--------------+-----------------------------+----------------|
| 12.2ZU | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2ZW | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.2ZY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| Affected | | Recommended |
| 12.3-Based | First Fixed Release | Release |
| Release | | |
|--------------+-----------------------------+----------------|
| | 12.3(15) | 12.3(23) |
| | | |
| | 12.3(16) | 12.3(20a) |
| | | |
| | 12.3(17a) | 12.3(21b) |
| | | |
| | 12.3(18) | 12.3(22a) |
| | | |
| 12.3 | 12.3(19) | 12.3(18a) |
| | | |
| | 12.3(20) | 12.3(19a); |
| | | available |
| | 12.3(21) | 16-Aug-07 |
| | | |
| | 12.3(22) | 12.3(17c); |
| | | available |
| | 12.3(23) | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3B | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | 12.3(17a)BC | 12.3(17b)BC8 |
| 12.3BC | | |
| | 12.3(21)BC | 12.3(21a)BC3 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3BW | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.3JA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3JEA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3JEB | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3JK | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3JL | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3JX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | Limited platform support is | |
| | available | 12.4(8d); |
| | | available |
| 12.3T | 12.3(11)T12; available | 03-Sep-07 |
| | 16-Aug-07 | |
| | | 12.4(7f) |
| | 12.3(14)T | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.3TPC | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3VA | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3XA | 12.3(2)XA6 | 12.3(2)XA6 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XB | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.3XC | 12.3(2)XC5 | 12.3(2)XC5 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XD | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| 12.3XE | 12.3(2)XE5; available | 12.3(2)XE5 |
| | 17-Aug-07 | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XF | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | | available |
| 12.3XG | Vulnerable; contact TAC | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XH | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | 12.3(7)XI10a; available | 12.3(7)XI10a; |
| 12.3XI | 21-Aug-07 | available |
| | | 21-Aug-07 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(14)YX9; |
| 12.3XJ | 12.3(14)YX | available |
| | | 13-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XK | 12.3(14)T | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XQ | 12.4(1) | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | 12.3(7)XR7; available | 12.3(7)XR7; |
| 12.3XR | 17-Aug-07 | available |
| | | 17-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | Vulnerable; first fixed in | available |
| 12.3XS | 12.4(1) | 03-Sep-07 |
| | | |
| | | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
|--------------+-----------------------------+----------------|
| | | 12.4(11)T3 |
| | | |
| | | 12.4(9)T5; |
| | | available |
| | | 24-Aug-07 |
| | | |
| | | 12.4(2)T6; |
| | Vulnerable; first fixed in | available |
| 12.3XU | 12.4(2)T | 20-Aug-07 |
| | | |
| | | 12.4(4)T8; |
| | | available |
| | | 28-Aug-07 |
| | | |
| | | 12.4(6)T8 |
| | | |
| | | 12.4(15)T1 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(14)YX9; |
| 12.3XW | 12.3(14)YX | available |
| | | 13-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.3XY | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | | 12.4(12c) |
| | | |
| | | 12.4(3h) |
| | | |
| | | 12.4(5c) |
| | | |
| | | 12.4(8d); |
| | | available |
| | | 03-Sep-07 |
| | Vulnerable; first fixed in | |
| 12.3YA | 12.4(1) | 12.4(7f) |
| | | |
| | | 12.4(16) |
| | | |
| | | 12.4(10c) |
| | | |
| | | 12.4(13d) |
| | | |
| | | 12.3(8)YG6; |
| | | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(11)T3 |
| | | |
| | | 12.4(9)T5; |
| | | available |
| | | 24-Aug-07 |
| | | |
| | | 12.4(2)T6; |
| | Vulnerable; first fixed in | available |
| 12.3YD | 12.4(2)T | 20-Aug-07 |
| | | |
| | | 12.4(4)T8; |
| | | available |
| | | 28-Aug-07 |
| | | |
| | | 12.4(6)T8 |
| | | |
| | | 12.4(15)T1 |
|--------------+-----------------------------+----------------|
| | Vulnerable; first fixed in | 12.3(14)YX9; |
| 12.3YF | 12.3(14)YX | available |
| | | 13-Aug-07 |
|--------------+-----------------------------+----------------|
| | 12.3(8)YG6; available | 12.3(8)YG6; |
| 12.3YG | 16-Aug-07 | available |
| | | 16-Aug-07 |
|--------------+-----------------------------+----------------|
| | | 12.4(11)T3 |
| | | |
| | | 12.4(9)T5; |
| | | available |
| | | 24-Aug-07 |
| | | |
| | | 12.4(2)T6; |
| | Vulnerable; first fixed in | available |
| 12.3YH | 12.4(2)T | 20-Aug-07 |
| | | |
| | | 12.4(4)T8; |
| | | available |
| | | 28-Aug-07 |
| | | |
| | | 12.4(6)T8 |
| | | |
| | | 12.4(15)T1 |
|--------------+-----------------------------+----------------|
| | | 12.4(11)T3 |
| | | |
| | | 12.4(9)T5; |
| | | available |
| | | 24-Aug-07 |
| | | |
| | | 12.4(2)T6; |
| | Vulnerable; first fixed in | available |
| 12.3YI | 12.4(2)T | 20-Aug-07 |
| | | |
| | | 12.4(4)T8; |
| | | available |
| | | 28-Aug-07 |
| | | |
| | | 12.4(6)T8 |
| | | |
| | | 12.4(15)T1 |
|--------------+-----------------------------+----------------|
| | | 12.4(11)T3 |
| | | |
| | | 12.4(9)T5; |
| | | available |
| | | 24-Aug-07 |
| | | |
| | | 12.4(2)T6; |
| | Vulnerable; first fixed in | available |
| 12.3YJ | 12.3(14)YQ | 20-Aug-07 |
| | | |
| | | 12.4(4)T8; |
| | | available |
| | | 28-Aug-07 |
| | | |
| | | 12.4(6)T8 |
| | | |
| | | 12.4(15)T1 |
|--------------+-----------------------------+----------------|
| | 12.3(11)YK3; available | 12.3(11)YK3; |
| 12.3YK | 20-Aug-07 | available |
| | | 20-Aug-07 |
|--------------+-----------------------------+----------------|
| 12.3YM | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3YQ | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3YS | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3YT | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3YU | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| 12.3YX | Not Vulnerable | |
|--------------+-----------------------------+----------------|
| | 12.3(11)YZ2; available | 12.3(11)YZ2; |
| 12.3YZ | 17-Aug-07 | available |
| | | 17-Aug-07 |
|--------------+-----------------------------+----------------|
| Affected | | Recommended |
| 12.4-Based | First Fixed Release | Release |
| Release | | |
|-------------------------------------------------------------|
| There are no affected 12.4 based releases |
+-------------------------------------------------------------+

Cisco IOS XR

The following table lists fixed Cisco IOS XR software.

+-------------------------------------------------------------+
| Cisco IOS XR Version | SMU ID | SMU Name |
|----------------------+---------+----------------------------|
| 3.2.3 | AA01920 | hfr-base-3.2.3.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.2.4 | AA01919 | hfr-base-3.2.4.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.2.6 | AA01918 | hfr-base-3.2.6.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.0 | AA01917 | hfr-base-3.3.0.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.1 | AA01916 | hfr-base-3.3.1.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.2 | AA01915 | hfr-base-3.3.2.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.3 | AA01914 | hfr-base-3.3.3.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.4 | AA01913 | hfr-base-3.3.4.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.4.0 | AA01912 | hfr-base-3.4.0.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.4.1 | AA01911 | hfr-base-3.4.1.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.3.1 | AA01910 | c12k-base-3.3.1.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.4.0 | AA01909 | c12k-base-3.4.0.CSCsi74127 |
|----------------------+---------+----------------------------|
| 3.4.1 | AA01908 | c12k-base-3.4.1.CSCsi74127 |
+-------------------------------------------------------------+

IOS XR Package Installation Envelopes (PIE) can be downloaded from File
Exchange at:
https://upload.cisco.com/cgi-bin/swc/fileexg/main.cgi?CONTYPES=IOS-XR .
Installation instructions are included in the accompanying .txt files.

Workarounds
===========

The workaround consists of filtering packets that contain Type 0
Routing header(s). Special attention must be paid not to filter packets
with Type 2 Routing headers as that would break a Mobile IPv6
deployment. Depending on which Cisco IOS software release is used, and
if Mobile IPv6 is deployed, there are several potential workarounds.
Because any packet type (TCP, UDP, ICMP) can be used to trigger this
vulnerability, care must be taken when implementing a workaround to
account for a spoofed IPv6 packet.

For devices running Cisco IOS XR and have mobile IPv6 deployed, there
is no workaround.

For additional information about protection mechanisms against IPv6
Routing headers, reference the "Countermeasures for the Malicious Use
of IPv6 Type 0 Routing Headers" Applied Intelligence white paper,
available at
http://www.cisco.com/web/about/security/intelligence/countermeasures-for-ipv6-type0-rh.html.

Devices Running Cisco IOS
+------------------------

Control Plane Policing
+---------------------

The following example is applicable irrespectively if Mobile IPv6 is,
or is not, deployed.

Control Plane Policing (CoPP) can be used to block untrusted IPv6
packets with Type 0 Routing Headers present to the affected device.
Cisco IOS software releases 12.0S, 12.2SX, 12.2S, 12.3T, 12.4, and
12.4T support the CoPP feature. CoPP may be configured on a device to
protect the management and control planes to minimize the risk and
effectiveness of direct infrastructure attacks by explicitly permitting
only authorized traffic sent to infrastructure devices in accordance
with existing security policies and configurations. The following
example can be adapted to your network.


!-- Permit all IPv6 Routing Header Type 0 (Source Route) packets
!-- sent to any IPv6 address configured on interfaces of the
!-- affected device or IPv6 link-local addresses. This traffic
!-- will be policed and dropped by the CoPP feature.
!

ipv6 access-list DENY-IPv6-RH0
permit ipv6 any any routing-type 0

!
!-- Permit (Police or Drop)/Deny (Allow) all other Layer3 and Layer4
!-- traffic in accordance with existing security policies and
!-- configurations for traffic that is authorized to be sent
!-- to infrastructure devices.
!
!-- Create a Class-Map for traffic to be policed by the CoPP feature.
!

class-map match-all drop-IPv6-RH0-class
match access-group name DENY-IPv6-RH0

!
!-- Create a Policy-Map that will be applied to the Control-Plane of
!-- the device.

policy-map drop-IPv6-RH0-traffic
class drop-IPv6-RH0-class
drop

!
!-- Apply the Policy-Map to the Control-Plane of the device.

control-plane
service-policy input drop-IPv6-RH0-traffic

!


In the above CoPP example, the access control list entries (ACEs),
which match the potential exploit packets with the "permit" action,
result in these packets being discarded by the policy-map "drop"
function.

Additional information on the configuration and use of the CoPP feature
can be found at
http://www.cisco.com/en/US/products/ps6642/products_white_paper0900aecd804fa16a.shtml

and

http://www.cisco.com/en/US/products/sw/iosswrel/ps1838/products_feature_guide09186a008052446b.html.

Mobile IPv6 is Not Deployed
+--------------------------

For IOS releases prior to 12.2(15)T, the workaround is to use ACLs to
filter all packets that contain Routing headers. This method can not
distinguish between Type 0 and Type 2 Routing headers, so it is not
suitable if Mobile IPv6 is deployed.

The following example shows how to configure such ACLs:

Router(config)#ipv6 access-list deny-sourcerouted
Router(config-ipv6-acl)#deny ipv6 any <myaddress1> routing
Router(config-ipv6-acl)#deny ipv6 any <myaddress2> routing
Router(config-ipv6-acl)#permit ipv6 any any

Router(config-ipv6-acl)#exit
Router(config)#interface Ethernet0
Router(config-if)#ipv6 traffic-filter deny-sourcerouted in



In the above example <myaddressX> is an IPv6 address. One example of
such an address is 2001:DB8:900D::1/64. The ACL must be applied to all
interfaces and include all IPv6 addresses that are configured. If an
interface has more than one IPv6 address configured then all addresses
must be covered by the ACLs. This also includes all loopback and link
local addresses for each interface.

The alternative to enumerating all IPv6 addresses is to use the
statement deny ipv6 any any routing. While that simplifies the
resulting ACL, it will also filter all transit IPv6 traffic with
Routing headers 0 and 2. The example in which all configured IPv6
addresses are enumerated will not affect transit traffic. This is
applicable to all other examples in this advisory.

Starting from the IOS release 12.2(15)T, a new command, ipv6
source-route was introduced. If applied, it will drop any IPv6 packet
with Type 0 Routing Headers received by the device itself (for example,
IPv6 destination address matches any of the IPv6 addresses configured
on the device). The command does not affects transit traffic. The
configuration is given in the following example:

Router(config)#no ipv6 source-route



This is a global command and it applies to all interfaces. The command
is applicable on all defined IPv6 addresses, including the link local
and loopback address, and on all interfaces.

Mobile IPv6 is Deployed
+----------------------

There is no workaround for devices running a Cisco IOS release prior to
12.2(15)T. Starting from the IOS release 12.2(15)T, a new command, ipv6
source-route was introduced. If applied, it will drop any IPv6 packet
with Type 0 Routing Headers received by the device itself (for example,
IPv6 destination address matches any of the IPv6 addresses configured
on the device). The command does not affects transit traffic. The
configuration is given in the following example:

Router(config)#no ipv6 source-route



This is a global command and it applies to all interfaces. The command
is applicable on all defined IPv6 addresses, including the link local
and loopback address, and on all interfaces.

In IOS 12.4(2)T, a new keyword routing-type is added to IPv6 ACLs. It
can be used to selectively permit or deny specific routing types.

Router(config)#ipv6 access-list deny-sourcerouted
Router(config-ipv6-acl)#deny ipv6 any <myaddress1> routing-type 0
Router(config-ipv6-acl)#permit ipv6 any any
Router(config)#interface Ethernet0
Router(config-if)#ipv6 traffic-filter deny-sourcerouted in



The above IPv6 ACL must be applied inbound on all interfaces on which
an IPv6 address is configured.

Devices Running Cisco IOS XR
+---------------------------

Mobile IPv6 is Not Deployed
+--------------------------

The workaround is to use ACLs to filter all packets that contain
Routing headers. This method can not distinguish between Type 0 and
Type 2 Routing headers, so it is not suitable if Mobile IPv6 is
deployed.

The following example shows how to configure such ACLs:

Router-IOS_XR#configure terminal
Router-IOS_XR(config)#ipv6 access-list deny-ipv6-type0-rh
Router-IOS_XR(config-ipv6-acl)#deny ipv6 any host 2001:0DB8:12::3 routing
Router-IOS_XR(config-ipv6-acl)#permit ipv6 any any
Router-IOS_XR(config-ipv6-acl)#exit
Router-IOS_XR(config)#interface GigabitEthernet 0/0/0/1
Router-IOS_XR(config-if)#ipv6 access-group deny-ipv6-type0-rh ingress
Router-IOS_XR(config-if)#end



The ACL must be applied to all interfaces and include all IPv6
addresses that are configured. If an interface has more than one IPv6
address configured then all addresses must be covered by the ACLs. This
also includes all loopback and link local addresses for each interface.

Mobile IPv6 is Deployed
+----------------------

There is no workaround if Mobile IPv6 is deployed.

Obtaining Fixed Software
========================

Cisco will make free software available to address this vulnerability
for affected customers. This advisory will be updated as fixed software
becomes available. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets they
have purchased. By installing, downloading, accessing or otherwise
using such software upgrades, customers agree to be bound by the terms
of Cisco's software license terms found at
http://www.cisco.com/public/sw-license-agreement.html, or as otherwise
set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.

Do not contact either "psirt@xxxxxxxxx" or "security-alert@xxxxxxxxx"
for software upgrades.

Customers with Service Contracts
+-------------------------------

Customers with contracts should obtain upgraded software through their
regular update channels. For most customers, this means that upgrades
should be obtained through the Software Center on Cisco's worldwide
website at http://www.cisco.com.

Customers using Third-party Support Organizations
+------------------------------------------------

Customers whose Cisco products are provided or maintained through prior
or existing agreement with third-party support organizations such as
Cisco Partners, authorized resellers, or service providers should
contact that support organization for guidance and assistance with the
appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific
customer situations such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.

Customers without Service Contracts
+----------------------------------

Customers who purchase direct from Cisco but who do not hold a Cisco
service contract and customers who purchase through third-party vendors
but are unsuccessful at obtaining fixed software through their point of
sale should get their upgrades by contacting the Cisco Technical
Assistance Center (TAC). TAC contacts are as follows.

* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@xxxxxxxxx

Have your product serial number available and give the URL of this
notice as evidence of your entitlement to a free upgrade. Free upgrades
for non-contract customers must be requested through the TAC.

Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
for additional TAC contact information, including special localized
telephone numbers and instructions and e-mail addresses for use in
various languages.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.

This vulnerability was initially rectified internally within Cisco
during hardening IPv6 protocol. It was subsequently re-discovered and
reported by Tom Cross from IBM Internet Security Systems X-Force.

Status of This Notice: FINAL
============================

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT
YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an uncontrolled
copy, and may lack important information or contain factual errors.

Distribution
============

This advisory is posted on Cisco's worldwide website at
http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml.

In addition to worldwide web posting, a text version of this notice is
clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

* cust-security-announce@xxxxxxxxx
* first-teams@xxxxxxxxx
* bugtraq@xxxxxxxxxxxxxxxxx
* vulnwatch@xxxxxxxxxxxxx
* cisco@xxxxxxxxxxxxxxxxx
* cisco-nsp@xxxxxxxxxxxxxxx
* full-disclosure@xxxxxxxxxxxxxxxxx
* comp.dcom.sys.cisco@xxxxxxxxxxxxxxxxxx

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on mailing
lists or newsgroups. Users concerned about this problem are encouraged
to check the above URL for any updates.

Revision History
================

+-------------------------------------------------------------+
| Revision 1.0 | 2007-August-08 | Initial public release. |
+-------------------------------------------------------------+

Cisco Security Procedures
=========================

Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and registering
to receive security information from Cisco, is available on Cisco's
worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.

- -----------------------------------------------------------------------

All contents are Copyright 2006-2007 Cisco Systems, Inc. All rights
reserved.
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