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Vulnerability Alert

Cisco ISR Route Processor 2 Dynamic Multipoint Virtual Private Network Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:29287
Version:1
First Published:2013 May 13 14:13 GMT
Last Published:2013 May 13 14:13 GMT
Port: Not available
CVE:CVE-2013-1136
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.6 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.8
 
 
Version Summary:Cisco IOS Software contains a vulnerability that could allow a local attacker to cause a denial of service condition. Updates are available.
 
 
Description
A vulnerability in the crypto engine process of Cisco IOS Software when running on Cisco Aggregation Services Router Route Processor 2 could allow an authenticated, local attacker to cause a crash of the route processor.

The vulnerability is due to a flaw in memory management. An attacker could exploit this vulnerability by creating many tunnels to the router and viewing the encryption statistics. An exploit could allow the attacker to cause the route processor to crash.

Cisco has confirmed the vulnerability in a security notice and software updates are available.
 
Warning Indicators
At the time this alert was first published, Cisco IOS Software Releases 15.3(1)T and prior were vulnerable. Later releases of Cisco IOS Software may also be affected.
 
IntelliShield Analysis
To exploit this vulnerability, the attacker must have local access to a targeted system. This access requirement limits the possibility of a successful exploit.

Customers are advised to review the bug report in the "Vendor Announcements" section for a current list of affected versions.

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 for bug ID CSCuc52193 at the following link: CVE-2013-1136
 
Impact
A local attacker could exploit this vulnerability to cause the route processor on a targeted device to crash, resulting in a denial of service (DoS) condition.
 
Technical Information
The vulnerability is due to improper memory management by the crypto engine process of the affected software.

A local attacker could exploit this vulnerability by creating many tunnels to an affected device and viewing the encryption statistics. Successful exploitation could cause the route processor on the affected device to crash, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only privileged users to access administration or management systems.

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 e-mail at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoIOS 15.3S 15.3(1)S, 15.3(1)S1, 15.3(1)S2, 15.3(2)S | 15.3T 15.3(1)T

Associated Products:
N/A




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


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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