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July 2009

3870 - Cisco Security Advisory: Active Template Library (ATL) Vulnerability

ID: 3870
Date: 29/07/2009

Title: 3870 - Cisco Security Advisory: Active Template Library (ATL) Vulnerability
Platform level affected:Net Application - Enterprise
Hardware components affected:Other
Specific operating systems components affected: Other
Net-enabled software: Other
Other software: Other
Remediation Summary:The manufacturer has reported a problem with this product but has yet to publish a solution. CPNI advise that additional care is exercised when using this product.
Vendors affected:Cisco
Applications affected:Cisco Unity 4.x, 5x., and 7.x
Adversity source: Unknown
Attack Vector: Vulnerability exploitation
Virulence: Proof of Concept
Warning Status: Proof of concept
Potential Damage: Remote execution/modification
Possible Duration: Unknown
Availability of fix: Future
Type of fix: Patch
Source: Cisco
Reliability of source: Trusted
Source URL: http://www.cisco.com/warp/public/707/cisco-sa-20090728-activex.shtml
Abstract: Advisory concerning certain Cisco products that use Microsoft Active Template Libraries (ATL) and headers that are vulnerable to remote code execution

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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.

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This advisory contains information released by the original author. Some of the information may have changed since it was released. If the issue affects you, it may be prudent to retrieve the advisory from the site of the original source to ensure that you receive the most current information concerning that problem. Reference to any specific commercial product, process, or service by trade name, trademark manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favouring by CPNI.

The views and opinions of authors expressed within this notice shall not be used for advertising or product endorsement purposes. CPNI shall not accept responsibility for any errors or omissions contained within this advisory. In particular, they shall not be liable for any loss or damage whatsoever, arising from or in connection with the usage of information contained within this advisory.

CSIRTUK is a member of the Forum of Incident Response and Security Teams (FIRST) and has contacts with other international Incident Response Teams (IRTs) in order to foster cooperation and coordination in incident prevention, to prompt rapid reaction to incidents, and to promote information sharing amongst its members and the community at large.