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ESB-2016.0647 - [Cisco] Cisco TelePresence Video Communication Server : Denial of service - Existing account

Date: 10 March 2016

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0647
          Cisco TelePresence Video Communication Server Denial of
                           Service Vulnerability
                               10 March 2016

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco TelePresence Video Communication Server
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1338  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160309-vcs

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Security Advisory

Cisco TelePresence Video Communication Server Denial of Service Vulnerability

Medium

Advisory ID: cisco-sa-20160309-vcs

Published: 2016 March 9 14:00 GMT

Version 1.0: Final

CVSS Score:

Base - 6.8

Workarounds:

No workarounds available

Cisco Bug IDs:

CSCuu43026

CVE-2016-1338

CWE-399

Summary

A vulnerability in the Session Initiation Protocol (SIP) message handling 
process of Cisco TelePresence Video Communication Server (VCS) could allow an
authenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to incorrect processing of specific incoming SIP 
messages. An attacker could exploit this vulnerability by sending a malicious
SIP message to an affected device. A successful exploit could allow the 
attacker to cause the device to stop processing VoIP calls.

Cisco has released software updates that address this vulnerability. There are
no workarounds that address this vulnerability.

This advisory is available at the following link: 
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160309-vcs

Affected Products

Vulnerable Products

Cisco TelePresence Video Communication Server (VCS) running software release 
X8.5.2 or X8.5.1 is vulnerable.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this 
vulnerability.

 Workarounds

There are no workarounds that address this vulnerability.

Fixed Software

When considering software upgrades, customers are advised to consult the Cisco
Security Advisories and Responses archive at http://www.cisco.com/go/psirt and
review subsequent advisories to determine exposure and a complete upgrade 
solution.

In all cases, customers should ensure that the devices to upgrade 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.

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described 
in this advisory.

URL

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160309-vcs

Revision History

Version 	Description 			Section 	Status 		Date

1.0 		Initial public release. 			Final 		2016-March-09

Legal Disclaimer

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 standalone copy or paraphrase of the text of this document that omits the 
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end 
users of Cisco products.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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