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Vulnerability Alert

Cisco TelePresence Supervisor MSE 8050 Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:29262
Version:1
First Published:2013 May 15 16:07 GMT
Last Published:2013 May 15 16:07 GMT
Port: Not available
CVE:CVE-2013-1236
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.4
Related Resources:
View related Security Advisory
 
 
Version Summary:Cisco TelePresence Supervisor MSE 8050 contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted system. Updates are available.
 
 
Description
Cisco TelePresence Supervisor MSE 8050 contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to improper handling and processing of TCP connection requests sent at a high rate. An unauthenticated, remote attacker could exploit this vulnerability by sending a sequence of TCP segments at a high rate to the management IP address of the affected system. A full TCP three-way handshake is required to exploit this vulnerability. An exploit could allow the attacker to cause high CPU utilization, which may trigger a reload of the affected system and cause a DoS condition.

Cisco has confirmed the vulnerability in a security advisory and has released software updates.
 
Warning Indicators
Cisco TelePresence Supervisor MSE 8050 running software versions 2.2(1.17) and earlier is affected.
 
IntelliShield Analysis
The Cisco TelePresence MSE 8000 Series is a chassis-based platform for high-definition video conferencing and voice communication. The Cisco TelePresence Supervisor MSE 8050 is the core of the Cisco TelePresence MSE 8000 Series and provides management service for the chassis and other Cisco TelePresence products that are supported as part of the Cisco TelePresence MSE 8000 Series.

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 advisory for bug IDs CSCuf76076 and CSCuf79763 at the following link: cisco-sa-20130515-mse
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to trigger a reload of the affected system and cause a DoS condition.
 
Technical Information
A vulnerability in the network stack of the Cisco TelePresence MSE 8050 Supervisor could allow an authenticated, remote attacker to cause high CPU utilization and a reload of the affected system.

The vulnerability is due to improper handling and processing of TCP connection requests sent at a high rate. An attacker could exploit this vulnerability by sending a sequence of TCP segments at a high rate to the management IP address of the affected system. A full TCP three-way handshake is required to exploit this vulnerability. An exploit could allow the attacker to cause high CPU utilization, which may trigger a reload of the affected system and cause a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

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

Understanding activity on the network provides information and visibility that can be used to identify potential security incidents. Organizations are advised to log events from devices and review the logged data to provide insight into anomalies or malicious activity. For logging best practices, consult Cisco Guide to Harden Cisco IOS Devices.

Network traffic should be monitored for security-related network activity. NetFlow identifies security-related network activity. For NetFlow configuration details, consult Introduction to Cisco IOS NetFlow - A Technical Overview.

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, consult Protecting Your Core: Infrastructure Protection Access Control Lists.

Administrators are advised to monitor affected systems.
 
Patches/Software
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco TelePresence Supervisor MSE 8050 Software 2.2 (1.17)

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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