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Cisco Unified Communications Manager Directory Traversal Vulnerability

Advisory ID: cisco-sa-20111026-cucm

Revision 1.0

For Public Release 2011 October 26 16:00  UTC (GMT)
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Summary
=======

Cisco Unified Communications Manager contains a directory traversal
vulnerability that may allow an unauthenticated, remote attacker to
retrieve arbitrary files from the filesystem.

Cisco has released free software updates that address this
vulnerability.

There are no workarounds that mitigate this vulnerability.

This advisory is posted at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111026-cucm


Cisco Unified Contact Center Express and Cisco Unified IP Interactive
Voice Response are also affected by this vulnerability, and a
separate advisory has been published at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111026-uccx

Note: Effective October 18, 2011, Cisco moved the current list of
Cisco Security Advisories and Responses published by Cisco PSIRT. The
new location is:
http://tools.cisco.com/security/center/publicationListing 

You can also navigate to this page from the Cisco Products and
Services menu of the Cisco Security Intelligence Operations (SIO)
Portal. Following this transition, new Cisco Security Advisories and
Responses will be published to the new location. Although the URL has
changed, the content of security documents and the vulnerability
policy are not impacted. Cisco will continue to disclose security
vulnerabilities in accordance with the published Security
Vulnerability Policy.

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

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

The following products are affected by this vulnerability:

  * Cisco Unified Communications Manager 6.x
  * Cisco Unified Communications Manager 7.x
  * Cisco Unified Communications Manager 8.x

Note: Cisco Unified Communications Manager version 5.1 reached end of
software maintenance on February 13, 2010. Customers who are using
Cisco Unified Communications Manager 5.x versions should contact
their Cisco support team for assistance in upgrading to a supported
version of Cisco Unified Communications Manager.

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

Cisco Unified Communications Manager 4.x is not affected by this
vulnerability.

With the exception of the Cisco Unified Contact Center Express and
Cisco Unified IP Interactive Voice Response, no other Cisco products
are currently known to be affected by this vulnerability.

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 and Cisco Unified Contact Center
Express Directory Traversal Vulnerability

Cisco Unified Communications Manager, Cisco Unified Contact Center
Express and Cisco Unified IP Interactive Voice Response contain a
directory traversal vulnerability that may allow an unauthenticated,
remote attacker to retrieve arbitrary files from the filesystem.

 Note: The Cisco Unified Communications Manager web service runs on
port 8080.

This advisory addresses the vulnerability in Cisco Unified
Communications Manager and is documented in Cisco bug ID CSCth09343,
and has been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2011-3315.

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

Cisco has provided scores for the vulnerability 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 2.0.

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

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

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



* CSCth09343, Cisco Unified Communications Manager and Cisco Unified
Contact Center Express Directory Traversal Vulnerability 

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

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


Impact
======

Successful exploitation of the vulnerability may allow a remote,
unauthenticated attacker to retrieve arbitrary files from the
filesystem.

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

When considering software upgrades, also consult:
http://www.cisco.com/go/psirt

As well as 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.

+-------------------------------------------------------------------+
| Cisco Unified Communications Manager        | First Fixed         |
| Version                                     | Releases            |
|---------------------------------------------+---------------------|
| 6.x                                         | 6.1(5)SU2           |
|---------------------------------------------+---------------------|
| 7.x                                         | 7.1(5b)SU2          |
|---------------------------------------------+---------------------|
| 8.0                                         | 8.0(3)              |
|---------------------------------------------+---------------------|
| 8.5                                         | Not vulnerable      |
|---------------------------------------------+---------------------|
| 8.6                                         | Not vulnerable      |
+-------------------------------------------------------------------+

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

There are no workarounds for this vulnerability.

Mitigations that can be deployed on Cisco devices within the network
are available in the Cisco Applied Intelligence companion document
for this advisory: 
http://www.cisco.com/warp/public/707/cisco-amb-20111026-cucm-uccx.shtml

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

Cisco has released free software updates that address these
vulnerabilities. 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/en/US/docs/general/warranty/English/EU1KEN_.html

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

Do not contact psirt@cisco.com or security-alert@cisco.com 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 agreements 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 do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire 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

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

Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

For additional TAC contact information, including 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 reported to Cisco by Felix "FX" Lindner of
Recurity Labs.

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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111026-cucm

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
  * bugtraq@securityfocus.com
  * vulnwatch@vulnwatch.org
  * cisco@spot.colorado.edu
  * cisco-nsp@puck.nether.net
  * full-disclosure@lists.grok.org.uk
  * comp.dcom.sys.cisco@newsgate.cisco.com

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
================

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| Revision 1.0   | 2011-October-26    | Initial public release.     |
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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

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Copyright 2010-2011 Cisco Systems, Inc. All rights reserved.
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