Vulnerability Alert

Cisco Jabber Video Engine Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:29764
Version:1
First Published:2013 June 25 17:26 GMT
Last Published:2013 June 25 17:26 GMT
Port: Not available
CVE:CVE-2013-3393
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.1
 
Version Summary:Cisco Jabber Video Engine contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
 
 
Description
A vulnerability in Cisco's Precision Video Engine (CVPE) code could allow an unauthenticated, remote attacker to cause the crash of various processes and the disconnection of any active calls.

The vulnerability is due to improper handling of crafted Real-Time Protocol (RTP) packets sent at a high rate. An attacker could exploit this vulnerability by sending crafted RTP packets to the affected system.

Cisco has confirmed this vulnerability in a security notice and released software updates.
 
Warning Indicators
At the time this alert was first published, the following versions of Cisco products were vulnerable. Later versions of Cisco products may also be affected.
  • Cisco Jabber for Windows versions 9.2.1 and prior
  • Cisco Virtualization Experience Media Engine versions 9.2.1 and prior
 
IntelliShield Analysis
To exploit this vulnerability, an attacker may need access to trusted, internal networks to send crafted RTP packets to the device. This access requirement decreases the likelihood of a successful exploit.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2013-3393

Customers should refer to Cisco bug IDs CSCuh60706 and CSCue21117 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause various processes on a targeted device to crash or disconnect any active calls in session on the device, resulting in a denial of service (DoS) condition.
 
Technical Information
The vulnerability is due to improper handling of crafted RTP packets sent at a high rate to be processed by an affected device.

An unauthenticated, remote attacker could exploit this vulnerability by sending crafted RTP packets to the affected system. If successful, the attacker could cause various processes on the device to crash, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

To mitigate DoS attacks, apply hardware rate limiter features to limit packets that require CPU processing. See vendor documentation for specific configuration instructions. For hardware rate limiting configuration details, see Cisco Catalyst 6500 Denial of Service (DoS) Protection Configuration Guide.

It is critical to prevent unauthorized direct communication to network devices. Restrict network traffic destined for the network infrastructure to protect against reconnaissance and DoS attacks. For configuration details, see Protecting Your Core: Infrastructure Protection Access Control Lists.

Administrators are advised to monitor affected systems.

 
Patches/Software
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco Jabber for Windows 9.0 Base, .1, .2, .3, .4, .5 | 9.1 .0, .1, .2, .3, .4, .5 | 9.2 .0, .1
CiscoCisco Virtualization Experience Media Engine 9.0 Base | 9.2 Base, .1

Associated Products:
N/A




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LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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