Cisco Security Advisory: Cisco Unified Communications Manager Skinny Client Control Protocol Vulnerabilities



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Cisco Unified Communications Manager Skinny Client Control Protocol Vulnerabilities

Advisory ID: cisco-sa-20120229-cucm

Revision 1.0

For Public Release 2012 February 29 16:00 UTC (GMT)

Summary
=======

Cisco Unified Communications Manager devices may allow a remote,
unauthenticated attacker with the ability to send crafted Skinny
Client Control Protocol (SCCP) messages to an affected device to cause
a reload or execute attacker-controlled SQL code.

Cisco has released free software updates that address these
vulnerabilities.

Workarounds that mitigate these vulnerabilities are available.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120229-cucm


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

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

The following products are affected by the vulnerabilities that are
described in this advisory:

* Cisco Unified Communications Manager Software versions 6.x
* Cisco Unified Communications Manager Software versions 7.x
* Cisco Unified Communications Manager Software versions 8.x
* Cisco Business Edition 3000
* Cisco Business Edition 5000
* Cisco Business Edition 6000

Note: Cisco Unified Communications Manager version 6.1 reached the End
of Software Maintenance on September 3, 2011. Customers using Cisco
Unified Communications Manager Software versions 6.x, should contact
their Cisco support team for assistance in upgrading to a supported
version of Cisco Unified Communications Manager.


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

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


Details
=======

Cisco Unified Communications Manager is the call processing component
of the Cisco IP Telephony solution that extends enterprise telephony
features and functions to packet telephony network devices, such as IP
phones, media processing devices, VoIP gateways, and multimedia
applications.

Cisco Unified Communications Manager contains two vulnerabilities that
involve the processing of SCCP packets. These issues may allow a
remote, unauthenticated attacker with the ability to send crafted SCCP
messages to an affected device to cause a reload or execute
attacker-controlled SQL code. Both SCCP ports (TCP ports 2000 and
2443) are affected.


Cisco Unified Communications Manager SCCP Registration may Cause Reload
+----------------------------------------------------------------------

Cisco Unified Communication Manager may reload when a specially
crafted SCCP message is processed. Successful exploitation could cause
a loss of all voice services that are being handled by the affected
device. After the device restarts, voice services will be restored.
This vulnerability is documented in Cisco bug ID CSCtu73538 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2011-4486.

Cisco Unified Communications Manager Vulnerable to Blind SQL Injection
During Registration
+---------------------------------------------------------------------

Cisco Unified Communications Manager may allow the blind execution of
attacker-controlled SQL code when processing a specially crafted SCCP
message. Successful exploitation could allow the attacker to modify
certain sections of the SQL database that are utilized by the device.
This vulnerability is also documented in Cisco bug ID CSCtu73538 and
has been assigned CVE ID CVE-2011-4487.


Vulnerability Scoring Details
=============================

Cisco has scored the vulnerabilities in this advisory based on the
Common Vulnerability Scoring System (CVSS). The CVSS scoring in this
security advisory is in accordance with CVSS version 2.0.

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

Cisco has provided a base and temporal score. Customers can also
compute environmental scores that help determine the impact of the
vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the
following link:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

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


* CSCtu73538 - Cisco Unified Communications Manager SCCP Registration may Cause Reload

CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete

CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed


* CSCtu73538 - Cisco Unified Communications Manager Vulnerable to Blind SQL
Injection During Registration

CVSS Base Score - 5.8
Access Vector - Network
Access Complexity - Medium
Authentication - None
Confidentiality Impact - None
Integrity Impact - Partial
Availability Impact - Partial

CVSS Temporal Score - 4.8
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed


Impact
======

Successful exploitation of the vulnerabilities that are described in
this advisory could allow an unauthenticated, remote attacker to
trigger a device reload or execute SQL commands against the back-end
database. A successful SQL injection could result in the retrieval or
modification of data or a persistent denial of service (DoS) condition
on the affected device. In the case of a device reload, Cisco Unified
Communications Manager will restart the affected processes, but
repeated attacks may result in a sustained DoS condition.


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

When considering software upgrades, customers are advised to consult
the Cisco Security Advisories and Responses archive at:
http://www.cisco.com/go/psirt

Review subsequent advisories to determine exposure and a complete
upgrade solution.

In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and
software configurations will continue to be supported properly by the
new release. If the information is not clear, customers are advised to
contact the Cisco Technical Assistance Center (TAC) or their
contracted maintenance providers.

+-------------------------------------------------------------------+
| Cisco Unified Communication | First Fixed Release |
| Manager Version | |
|---------------------------------+---------------------------------|
| 6.x | Vulnerable; migrate to 7.1(5b) |
| | su5 or later |
|---------------------------------+---------------------------------|
| 7.x | 7.1(5b)su5; available in March |
| | 2012 |
|---------------------------------+---------------------------------|
| 8.0 | 8.0(3a)su3 |
|---------------------------------+---------------------------------|
| 8.5 | Vulnerable; migrate to 8.6(2a) |
| | su1 |
|---------------------------------+---------------------------------|
| 8.6 | 8.6(2a)su1; available in March |
| | 2012 |
|---------------------------------+---------------------------------|
| Cisco Business Edition 3000 | 8.6.3 |
| Software | |
|---------------------------------+---------------------------------|
| Cisco Business Edition 5000 | 8.6(2a)su1; available in March |
| Software | 2012 |
|---------------------------------+---------------------------------|
| Cisco Business Edition 6000 | 8.6(2a)su1; available in March |
| Software | 2012 |
+-------------------------------------------------------------------+

Cisco Unified Communications Manager Software can be downloaded at the
following link:
http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=268439621

Cisco Business Edition Software can be downloaded at the following
link:
http://www.cisco.com/cisco/software/navigator.html?mdfid=283661240&i=rm


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

Administrators can mitigate these vulnerabilities limiting access to
TCP ports 2000 and 2443 to only allow traffic from networks that
require SCCP access to Cisco Unified Communications Manager appliances.

Additional mitigation techniques that can be deployed on Cisco devices
within the network are available in the Cisco Applied Mitigation
Bulletin companion document for this advisory:
http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20120229-cucm


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

Cisco has released free software updates that address the
vulnerabilities described in this advisory. Prior to deploying
software, customers are advised to consult their maintenance providers
or check the software for feature set compatibility and known issues
that are specific to their environments.

Customers may only install and expect support for feature sets they
have purchased. By installing, downloading, accessing, or otherwise
using such software upgrades, customers agree to follow the terms of
the Cisco software license at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html

Or as set forth at http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact 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, upgrades should be
obtained through the Software Center on Cisco.com at:
http://www.cisco.com


Customers Using Third-Party Support Organizations
- -------------------------------------------------

Customers with Cisco products that are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers,
should contact that organization for assistance with the appropriate
course of action.

The effectiveness of any workaround or fix depends on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Because of the variety of
affected products and releases, customers should consult their service
providers or support organizations to ensure that any applied
workaround or fix is the most appropriate in the intended network
before it is deployed.


Customers Without Service Contracts
- -----------------------------------

Customers who purchase directly from Cisco but do not hold a Cisco
service contract and customers who make purchases through third-party
vendors but are unsuccessful in obtaining fixed software through their
point of sale should obtain upgrades by contacting the Cisco Technical
Assistance Center (TAC):

* +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

Customers should have the product serial number available and be
prepared to provide the URL of this advisory as evidence of
entitlement to a free upgrade. Customers without service contracts
should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

For additional TAC contact information, including localized telephone
numbers, instructions, and e-mail addresses for support in various
languages.


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

These vulnerabilities were publicly disclosed on Bugtraq on November
8, 2011. The Cisco Product Security Incident Response Team (PSIRT) is
not aware of any malicious use of the vulnerabilities described in
this advisory.

These vulnerabilities were reported to Cisco by Felix Lindner of
Recurity Labs GmbH and discovered by Sandro Gauci.


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 Security Intelligence Operations at
the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120229-cucm

Additionally, a text version of this advisory is clear signed with
the Cisco PSIRT PGP key and circulated among the following e-mail
addresses:

* cust-security-announce@xxxxxxxxx
* first-bulletins@xxxxxxxxxxxxxxx
* bugtraq@xxxxxxxxxxxxxxxxx
* vulnwatch@xxxxxxxxxxxxx
* cisco@xxxxxxxxxxxxxxxxx
* cisco-nsp@xxxxxxxxxxxxxxx
* full-disclosure@xxxxxxxxxxxxxxxxx

Future updates of this advisory, if any, will reside on Cisco.com but
may not be announced on mailing lists. Users can monitor this
advisory's URL for any updates.


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

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| Revision 1.0 | 2012-February-29 | Initial public release. |
+-------------------------------------------------------------------+


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

Complete information about reporting security vulnerabilities in
Cisco products, obtaining assistance with security incidents, and
registering to receive security information from Cisco is available
on Cisco.com at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html

This web page includes instructions for press inquiries regarding
Cisco Security Advisories. All Cisco Security Advisories are available
at:
http://www.cisco.com/go/psirt

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Copyright 2010-2012 Cisco Systems, Inc. All rights reserved.
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