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Active Template Library (ATL) Vulnerability



Cisco Security Advisory: Active Template Library (ATL) Vulnerability
Cisco Security Advisory: Active Template Library (ATL) Vulnerability



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Cisco Security Advisory: Active Template Library (ATL) Vulnerability

Advisory ID: cisco-sa-20090728-activex

http://www.cisco.com/warp/public/707/cisco-sa-20090728-activex.shtml 

Revision 1.0

For Public Release 2009 July 28 1800 UTC (GMT)

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

Summary
======
Certain Cisco products that use Microsoft Active Template Libraries
(ATL) and headers may be vulnerable to remote code execution. In some
instances, the vulnerability may be exploited against Microsoft
Internet Explorer to perform kill bit bypass. In order to exploit this
vulnerability, an attacker must convince a user to visit a malicious
web site.

Cisco will release free software updates for products that are
affected by this vulnerability. Workarounds that mitigate this
vulnerability are available.

This advisory is posted at

http://www.cisco.com/warp/public/707/cisco-sa-20090728-activex.shtml 

Affected Products
================
Vulnerable Products
+------------------

The following products are affected by this vulnerability:

  * Cisco Unity 4.x, 5x., and 7.x

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

The following Cisco products are not known to be affected by this
vulnerability:

  * Cisco AnyConnect VPN Client
  * Cisco Adaptive Security Device Manager (ASDM)
  * Cisco Building Broadband Service Manager (BBSM)
  * Cisco Catalyst Operating System (Catalyst OS)
  * Cisco Computer Telephony Integration Object Server (CTI)
  * Cisco IOS Software
  * Cisco IP/TV
  * Cisco Meetingplace
  * Cisco Mobile Wireless Fault Mediator (MWFM)
  * Cisco NAC Appliance (formerly Cisco Clean Access)
  * Cisco Secure Access Control Server (ACS)
  * Cisco Secure Desktop
  * Cisco Security Agent
  * Cisco Security Monitoring, Analysis and Response System (MARS)
  * Cisco SSL VPN Client (SVC)
  * Cisco Unified Contact Center Express (Unified CCX)
  * Cisco Video Surveillance Media Server (VSMS)
  * CiscoWorks LAN Management Solution (LMS)
  * WebEx

Details
======
Microsoft has identified vulnerabilities in the Active Template
Library (ATL) headers that are shipped with the Software Development
Kit (SDK) for Microsoft Windows systems and used in Cisco products.
In general, this vulnerability, if exposed by an ActiveX control,
could lead to remote code execution on a client's system.

For complete details, please review the Microsoft Security Bulletin
at: http://www.microsoft.com/technet/security/Bulletin/MS09-035.mspx 

The following Bug IDs have been filed for Cisco Products affected by
this vulnerability:

  * CSCta71728 ( registered customers only)

Vulnerability Scoring Details
============================
Cisco has provided 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 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 

CSCta71728 - Vulnerability in the ActiveX headers used in Unity
+-----------------------------------------------------

CVSS Base Score - 9.3

        Access Vector            - Network
        Access Complexity        - Medium
        Authentication           - None
        Confidentiality Impact   - Complete
        Integrity Impact         - Complete
        Availability Impact      - Complete

CVSS Temporal Score - 8.4

        Exploitability           - Proof-of-Concept
        Remediation Level        - Unavailable
        Report Confidence        - Confirmed

Impact
=====
Successful exploitation of the vulnerability may result in remote
code execution.

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.

Workarounds
==========
General information on ActiveX attacks and mitigation techniques can
be found at the following link:

http://www.cisco.com/web/about/security/intelligence/actX-ALPI_amiddleton.html 

Obtaining Fixed Software
=======================
Cisco will release free software updates that address this
vulnerability. 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 malicious use of the
vulnerability described in this advisory against any Cisco product.

Status of this Notice: INTERIM
=============================
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. CISCO EXPECTS TO UPDATE THIS DOCUMENT AS NEW
INFORMATION BECOMES AVAILABLE.

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-20090728-activex.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-bulletins@lists.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
===============
+---------------------------------------+
| Revision |              | Initial     |
| 1.0      | 2009-July-28 | 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. 

=A9 2008 - 2009 Cisco Systems, Inc. All rights reserved. 
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