[c-nsp] Cisco Security Advisory: Cisco Unified Contact Center Express Directory Traversal Vulnerability

Wed Oct 26 12:16:22 EDT 2011

Cisco Unified Contact Center Express (UCCX or Unified CCX) and Cisco
Unified IP Interactive Voice Response (Unified IP-IVR) contain a
directory traversal vulnerability that may allow a remote,
unauthenticated 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-uccx

Cisco Unified Communications Manager is also affected by this
vulnerability and a separate advisory has been published at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111026-cucm

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 Cisco UCCX versions are vulnerable:

  * Cisco UCCX version 6.0(x)
  * Cisco UCCX version 7.0(x)
  * Cisco UCCX version 8.0(x)
  * Cisco UCCX version 8.5(x)

Note: Cisco UCCX versions prior to 6.0(x) reached end of software
maintenance. Customers running versions prior to 6.0(x) should
contact their Cisco support team for assistance in upgrading to a
supported version of Cisco UCCX.

The following Cisco Unified IP Interactive Voice Response versions
are vulnerable:

  * Cisco Unified IP Interactive Voice Response version 6.0(x)
  * Cisco Unified IP Interactive Voice Response version 7.0(x)
  * Cisco Unified IP Interactive Voice Response version 8.0(x)
  * Cisco Unified IP Interactive Voice Response version 8.5(x)

Note: Cisco Unified IP Interactive Voice Response versions prior to
6.0(x) reached end of software maintenance. Customers running
versions prior to 6.0(x) should contact their Cisco support team for
assistance in upgrading to a supported version of Cisco Unified IP
Interactive Voice Response.

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

With the exception of Cisco Unified Communications Manager, no other
Cisco products are currently known to be affected by this
vulnerability.

Details
=======

The Cisco Unified Contact Center Express is a single/two node server,
integrated "contact center in a box" for use in deployments with up to
300 agents until software version 8.0(x) and 400 agents starting at
version 8.5(x).

The Cisco Unified Interactive Voice Response is a UCCX product package
that provides IP call queuing and IP intelligent voice response
functionality for contact centers.

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.

The vulnerability is due to improper input validation, and could allow
the attacker to traverse the filesystem directory. An attacker could
exploit this vulnerability by sending a specially crafted URL to the
affected system.

The vulnerability in Cisco Unified Contact Center Express and Cisco
Unified IP Interactive Voice Response could be exploited over TCP port
8080 in 6.0(x) and 7.0(x) versions and TCP port 9080 starting in
8.0(x) version of the product.

Note: In Cisco Unified Contact Center Express and Cisco Unified IP
Interactive Voice Response versions 6.0(x) and 7.0(x), port 8080 could
be reconfigured on the server.

This advisory addresses the vulnerability in Cisco Unified Contact
Center Express and Cisco Unified IP Interactive Voice Response, which
is documented in Cisco bug ID CSCts44049, and has been assigned 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

* CSCts44049 - UCCX vulnerable to directory traversal 

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 Cisco
Unified Contact Center Express or Cisco Unified IP Interactive Voice
Response filesystem.

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

Cisco has released free software updates that address this
vulnerability.

The following table contains the remediation for each affected version
of Cisco Unified Contact Center Express and Cisco Unified IP
Interactive Voice Response:

+-------------------------------------------------------------------+
| Version |                     First Fixed in                      |
|---------+---------------------------------------------------------|
| 6.0(x)  | 6.0(1)SR1ES8                                            |
|---------+---------------------------------------------------------|
| 7.0(x)  | 7.0(2)ES1                                               |
|---------+---------------------------------------------------------|
| 8.0(x)  | 8.0(2)SU3 and patch ciscouccx.802SU3_CSCts44049.cop.sgn |
|---------+---------------------------------------------------------|
| 8.5(x)  | 8.5(1)SU2                                               |
+-------------------------------------------------------------------+

Releases 6.0(1)SR1ES8 and 7.0(2)ES1 will not be posted on cisco.com.
Customers should contact Cisco Technical Assistance Center (TAC) for
assistance.

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.

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://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20111026-cucm-uccx.

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 at cisco.com or security-alert at 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 at 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 the Vulnerability
Research Team of Digital Defense, Inc.

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-uccx

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

+-------------------------------------------------------------------+
|  Revision 1.0  |  2011-October-26   |   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
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