[Full-Disclosure] Cisco Security Advisory: Crafted Packet Causes Reload on Cisco Routers

From: Cisco Systems Product Security Incident Response Team (psirt_at_cisco.com)
Date: 01/26/05

  • Next message: Michael Holstein: "Re: [Full-Disclosure] The UPC packer"
    To: full-disclosure@lists.netsys.com
    Date: Wed, 26 Jan 2005 17:00:00 +0100
    
    

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    Cisco Security Advisory: Crafted Packet Causes Reload on Cisco Routers

    Revision 1.0

    For Public Release 2005 January 26 1600 (GMT)

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

    Contents

        Summary
        Affected Products
        Details
        Impact
        Software Versions and Fixes
        Obtaining Fixed Software
        Workarounds
        Exploitation and Public Announcements
        Status of This Notice: FINAL
        Distribution
        Revision History
        Cisco Security Procedures

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

    Summary
    =======

    Cisco Routers running Internetwork Operating System (IOS) that supports Multi
    Protocol Label Switching (MPLS) are vulnerable to a Denial of Service (DoS)
    attack on MPLS disabled interfaces. A system that supports MPLS is vulnerable
    even if that system is not configured for MPLS.

    The vulnerability is only present in Cisco IOS release trains based on 12.1T,
    12.2, 12.2T, 12.3 and 12.3T. Releases based on 12.1 mainline, 12.1E and all
    releases prior to 12.1 are not vulnerable.

    Cisco has made free software available to address this vulnerability.

    There are workarounds available to mitigate the effects.

    This issue is tracked by CERT/CC VU#583638.

    This advisory is available at
    http://www.cisco.com/warp/public/707/cisco-sa-20050126-les.shtml.

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

    Vulnerable Products

    Only the following products running a vulnerable version of IOS that support
    MPLS are affected.

      * 2600 and 2800 series routers
      * 3600, 3700 and 3800 series routers
      * 4500 and 4700 series routers
      * 5300, 5350 and 5400 series Access Servers

    Products that are not listed above are not affected.

    MPLS is not supported in IP and IP Plus feature sets. Therefore, products
    running an IOS version with an IP or IP Plus feature set are not vulnerable.

    An attack can only be launched at systems that are not configured for MPLS
    Traffic Engineering and on the interfaces where MPLS is not enabled. MPLS
    enabled interfaces can be determined by the show mpls interfaces command.

    An unaffacted system where MPLS is not supported will give an output similar to
    the following.

        Router#show mpls interfaces
                     ^
          % Invalid input detected at '^' marker.

        Router#

    MPLS can be enabled in different ways on a router. In the below output, a
    router is shown that has MPLS enabled for IP on interface Ethernet0/0.

          Router#show mpls interfaces
          Interface IP Tunnel Operational
          Ethernet0/0 Yes (tdp) No Yes
          Router#

    When MPLS for IP is enabled on an interface, the router is immune to the
    attacks coming from that interface but vulnerable to the attacks coming from
    other interfaces. Enabling MPLS for IP on all interfaces of the router will
    make the router immune to attacks coming from any interface. An interface that
    has MPLS for IP enabled will have mpls ip or tag-switching ip command in the
    interface configuration.

    MPLS Traffic Engineering (TE) provides a better protection against this
    vulnerability. If MPLS TE is enabled globally, the router will be immune to the
    attacks coming from any interface. A router that has MPLS TE enabled will have
    mpls traffic-eng tunnels command in the show running-config output.

    Products Confirmed Not Vulnerable

      * Products that are not running Cisco IOS are not vulnerable.
      * Products running Cisco IOS versions 12.0 and earlier and 12.1 mainline are
        not vulnerable.
      * Products that are not mentioned in the Affected Products section are not
        vulnerable (including but not limited to Cisco 7200, 7500, 12000 series and
        Catalyst systems).

    No other Cisco products are currently known to be affected by these
    vulnerabilities.

    Details
    =======

    Multi Protocol Label Switching (MPLS) is a vendor-independent protocol that
    integrates layer-2 (as defined in the Open System Interconnection Reference
    Model) information into layer-3. More information on MPLS can be found at http:
    //www.cisco.com/warp/public/732/Tech/mpls.

    A vulnerability exists in the processing of an MPLS packet that is received on
    an interface where MPLS is disabled. A router that is configured for MPLS
    Traffic Engineering is immune to attacks coming from any interface.

    A Cisco device receiving a crafted packet on an MPLS disabled interface will
    reset and may take several minutes to become fully functional. This
    vulnerability may be exploited repeatedly resulting in an extended DoS attack.
    This issue is documented in bugs ID CSCeb56909 ( registered customers only) and
    CSCec86420 ( registered customers only) .

    Such crafted packets can only be sent from the local network segment.

    Impact
    ======

    Successful exploitation of this vulnerability could result in a reload of the
    device. Repeated exploitation could result in a sustained DoS attack.

    Software Versions and Fixes

    +---------------------------------------------+
    | Major Release | Availability of Repaired |
    | | Releases |
    |-----------------+---------------------------|
    | Affected | | | |
    | 12.1-Based | Rebuild | Maintenance | |
    | Release | | | |
    |-----------------+------------------------+--|
    | 12.1DB | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1DC | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1T | Migrate to 12.2 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XG | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XI | Migrate to 12.2 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XJ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XL | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XM | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XP | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XQ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XR | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XT | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XU | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1XV | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YA | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YB | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YC | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YD | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YE | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YF | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YH | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.1YI | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | Affected | | | |
    | 12.2-Based | Rebuild | Maintenance | |
    | Release | | | |
    |-----------------+----------+-------------+--|
    | | 12.2 | | |
    | | (10g) | | |
    | |----------+-------------+--|
    | | 12.2 | | |
    | | (13e) | | |
    | |----------+-------------+--|
    | | 12.2 | | |
    | | (16f) | | |
    | |----------+-------------+--|
    | 12.2 | 12.2 | | |
    | | (17d) | | |
    | |----------+-------------+--|
    | | 12.2 | | |
    | | (19b) | | |
    | |----------+-------------+--|
    | | 12.2 | | |
    | | (21a) | | |
    | |----------+-------------+--|
    | | | 12.2(23) | |
    |-----------------+------------------------+--|
    | | 12.2(2)B through 12.2 | |
    | | (4)B7, Migrate to 12.3 | |
    | | or later | |
    |12.2B |------------------------+--|
    | | 12.2(4)B8 and forward, | |
    | | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2BC | 12.2(15) | | |
    | | BC2 | | |
    |-----------------+------------------------+--|
    | 12.2BW | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2BX | Migrate to 12.3(7)XI1 | |
    | | or later | |
    |-----------------+------------------------+--|
    | 12.BY | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2BZ | Migrate to 12.3(7)XI1 | |
    | | or later | |
    |-----------------+------------------------+--|
    | 12.2CX | Migrate to 12.2(15)BC2 | |
    |-----------------+------------------------+--|
    | 12.2CY | Migrate to 12.2(15)BC2 | |
    |-----------------+------------------------+--|
    | 12.2CZ | 12.2(15)CZ | |
    |-----------------+------------------------+--|
    | 12.2DA | 12.2(12) | | |
    | | DA6 | | |
    |-----------------+------------------------+--|
    | 12.2DD | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2DX | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2EW | | 12.2(18)EW | |
    |-----------------+----------+-------------+--|
    | 12.2EWA | | 12.2(20)EWA | |
    |-----------------+----------+-------------+--|
    | 12.2JA | | 12.2(15)JA | |
    |-----------------+----------+-------------+--|
    | 12.2JK | | 12.2(15)JK | |
    |-----------------+------------------------+--|
    | 12.2MB | Migrate to 12.2(19)SW | |
    |-----------------+------------------------+--|
    | 12.2MC | Migrate to 12.3(11)T | |
    |-----------------+------------------------+--|
    | 12.2MX | Migrate to 12.3(8)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | | 12.2(14) | | |
    | 12.2S | S10 | | |
    | |----------+-------------+--|
    | | | 12.2(18)S | |
    |-----------------+----------+-------------+--|
    | 12.2SU | | 12.2(14)SU | |
    |-----------------+----------+-------------+--|
    | 12.2SW | | 12.2(19)SW | |
    |-----------------+------------------------+--|
    | 12.2SX | Migrate to 12.2(17d) | |
    | | SXB or later | |
    |-----------------+------------------------+--|
    | 12.2SXA | Migrate to 12.2(17d) | |
    | | SXB or later | |
    |-----------------+------------------------+--|
    | 12.2SXB | | 12.2(17d) | |
    | | | SXB | |
    |-----------------+----------+-------------+--|
    | 12.2SXD | | 12.2(18)SXD | |
    |-----------------+------------------------+--|
    | 12.2SY | Migrate to 12.2(17d) | |
    | | SXB or later | |
    |-----------------+------------------------+--|
    | 12.2SZ | Migrate to 12.2(20)S4 | |
    |-----------------+------------------------+--|
    | 12.2T | 12.2(13) | | |
    | | T14 | | |
    |-----------------+------------------------+--|
    | 12.2XA | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XB | 12.2(2) | | |
    | | XB18 | | |
    |-----------------+------------------------+--|
    | 12.2XC | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XD | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XE | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XF | Migrate to 12.2(15)BC2 | |
    |-----------------+------------------------+--|
    | 12.2XG | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XH | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XI | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XJ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XK | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XL | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XM | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XN | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XQ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XR | | 12.2(15)XR | |
    |-----------------+------------------------+--|
    | 12.2XS | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XT | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XU | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XV | No plan. | |
    |-----------------+------------------------+--|
    | 12.2XW | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2XZ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YA | 12.2(4) | | |
    | | YA8 | | |
    |-----------------+------------------------+--|
    | 12.2YB | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YC | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YD | Migrate to 12.3(8)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YE | Migrate to 12.2(18)S | |
    | | or later | |
    |-----------------+------------------------+--|
    | 12.2YF | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YG | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YH | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YJ | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YL | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YM | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YN | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YO | Migrate to 12.2(17d) | |
    | | SXB or later | |
    |-----------------+------------------------+--|
    | 12.2YQ | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YR | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YS | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YU | Migrate to 12.3(2)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YV | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YW | Migrate to 12.3(2)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2YX | Migrate to 12.2(14)SU | |
    |-----------------+------------------------+--|
    | 12.2YZ | Migrate to 12.2(20)S4 | |
    |-----------------+------------------------+--|
    | 12.2ZB | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZC | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZD | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZE | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZF | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZG | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZH | Migrate to 12.3(4)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZI | Migrate to 12.2(18)S | |
    | | or later | |
    |-----------------+------------------------+--|
    | 12.2ZJ | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZL | Migrate to 12.3(7)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZN | Migrate to 12.3T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZO | Migrate to 12.3 or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.2ZP | No plan. | |
    |-----------------+------------------------+--|
    | Affected | | | |
    | 12.3-Based | Rebuild | Maintenance | |
    | Release | | | |
    |-----------------+----------+-------------+--|
    | | 12.3(3f) | | |
    |12.3 |----------+-------------+--|
    | | | 12.3(5) | |
    |-----------------+----------+-------------+--|
    | 12.3B | | 12.3(5a)B4 | |
    |-----------------+----------+-------------+--|
    | 12.3BC | | 12.3(9a)BC | |
    |-----------------+------------------------+--|
    | 12.3BW | Migrate to 12.3(5a)B | |
    | | or later | |
    |-----------------+------------------------+--|
    | | 12.3(2) | | |
    | | T5 | | |
    | |----------+-------------+--|
    | 12.3T | 12.3(4) | | |
    | | T7 | | |
    | |----------+-------------+--|
    | | | 12.3(7)T | |
    |-----------------+------------------------+--|
    | 12.3XA | Migrate to 12.3(7)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | 12.3XB | Migrate to 12.3(8)T or | |
    | | later | |
    |-----------------+------------------------+--|
    | | Migrate to 12.3(2)XC3 | |
    | 12.3XC | - Availablility date | |
    | | TBD | |
    |-----------------+------------------------+--|
    | 12.3XD | 12.3(4)XD | |
    |-----------------+------------------------+--|
    | 12.3XE | 12.3(2)XE1 | |
    |-----------------+------------------------+--|
    | 12.3XF | 12.3(2)XF | |
    |-----------------+------------------------+--|
    | 12.3XG | 12.3(4) | | |
    | | XG1 | | |
    |-----------------+------------------------+--|
    | 12.3XH | 12.3(4)XH | |
    |-----------------+------------------------+--|
    | 12.3XI | 12.3(7)XI | |
    |-----------------+------------------------+--|
    | 12.3XJ | 12.3(7)XJ | |
    |-----------------+------------------------+--|
    | 12.3XK | 12.3(4) | | |
    | | XK1 | | |
    |-----------------+------------------------+--|
    | 12.3XL | 12.3(7)XL | |
    |-----------------+------------------------+--|
    | 12.3XM | 12.3(7)XM | |
    |-----------------+------------------------+--|
    | 12.3XN | 12.3(4)XN | |
    |-----------------+------------------------+--|
    | 12.3XQ | 12.3(4)XQ | |
    |-----------------+------------------------+--|
    | 12.3XR | 12.3(7)XR | |
    |-----------------+------------------------+--|
    | 12.3XS | 12.3(7)XS | |
    |-----------------+------------------------+--|
    | 12.3XT | 12.3(2)XT | |
    |-----------------+------------------------+--|
    | 12.3XU | 12.3(8)XU | |
    |-----------------+------------------------+--|
    | 12.3XW | 12.3(8)XW | |
    |-----------------+------------------------+--|
    | 12.3XX | 12.3(8)XX | |
    |-----------------+------------------------+--|
    | 12.3XY | 12.3(8)XY | |
    |-----------------+------------------------+--|
    | 12.3YA | 12.3(8)YA | |
    |-----------------+------------------------+--|
    | 12.3YD | 12.3(8)YD | |
    |-----------------+------------------------+--|
    | 12.3YE | 12.3(4)YE | |
    |-----------------+------------------------+--|
    | 12.3YF | 12.3(11)YF | |
    |-----------------+------------------------+--|
    | 12.3YG | 12.3(8)YG | |
    |-----------------+------------------------+--|
    | 12.3YH | 12.3(8)YH | |
    +---------------------------------------------+

    When considering software upgrades, please also consult http://www.cisco.com/en
    /US/products/products_security_advisories_listing.html 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) for assistance.

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

    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 assistance with the upgrade, which should be free of
    charge.

    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@cisco.com

    Please 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.

    Please do not contact either "psirt@cisco.com" or "security-alert@cisco.com"
    for software upgrades.

    See 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.

    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.

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

    The effectiveness of any workaround 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 is the most appropriate for use in the intended
    network before it is deployed.

    Warning: Using this workaround may affect the operation of your network and
    might cause problems. Therefore it is strongly recommended that you do a code
    upgrade if you are affected. It is not recommended that you use the workaround
    as a long term solution.

    Enabling MPLS Traffic Engineering (MPLS TE) globally can be used as a
    workaround to mitigate this vulnerability. Since MPLS requires Cisco Express
    Forwarding (CEF) in order to work, CEF needs to be enabled first in order to
    enable MPLS TE.

    CEF and MPLS TE can be enabled by the following commands.

        Router(config)# ip cef
        Router(config)# mpls traffic-eng tunnels

    Having MPLS TE enabled will make the router immune to the attacks coming from
    any interface.

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

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

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

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

    A stand-alone copy or paraphrase of the text of this security advisory 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 will be posted on Cisco's worldwide website at
    http://www.cisco.com/warp/public/707/cisco-sa-20050126-les.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@cisco.com
      * first-teams@first.org (includes CERT/CC)
      * bugtraq@securityfocus.com
      * vulnwatch@vulnwatch.org
      * cisco@spot.colorado.edu
      * cisco-nsp@puck.nether.net
      * full-disclosure@lists.netsys.com
      * comp.dcom.sys.cisco@newsgate.cisco.com
      * Various internal Cisco mailing lists

    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 | 2005-January-26 | Initial public |
    | 1.0 | | 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.

    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.2.5 (GNU/Linux)

    iD8DBQFB97UdezGozzK2tZARAnvpAJ97oXI2aUhYUDe5HIFSa5N/wHJrmQCg7rhz
    BS4EvADfUI5e0X6zvvleZ60=
    =wmKc
    -----END PGP SIGNATURE-----
    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html


  • Next message: Michael Holstein: "Re: [Full-Disclosure] The UPC packer"

    Relevant Pages