Products & Services
Support

Product Categories


Popular Downloads


Manage Software

How to Buy

For Home

Linksys Products Store
Linksys is now part of Belkin
Products for everyone

All Ordering Options

Training & Events Partners
Guest

Vulnerability Alert

Cisco ISM Malformed Authentication Header Packet Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:29252
Version:1
First Published:2013 May 07 20:20 GMT
Last Published:2013 May 07 20:20 GMT
Port: Not available
CVE:CVE-2013-1241
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:6.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.2
 
 
Version Summary:Cisco ISM module for ISR G2 contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition. Updates are available.
 
 
Description
A vulnerability in authentication header packets processing on the Cisco ISM module for ISR G2 could allow an authenticated, remote attacker to cause a reload of the affected module.

The vulnerability is due to improper processing of malformed authentication header packets. An attacker could exploit this vulnerability by sending a stream of malformed authentication header packets over an established IPsec security association. An exploit could allow the attacker to cause a reload of the affected module, resulting in a denial of service (DoS) condition for IPsec traffic.

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(200)T and prior were vulnerable. Later releases of Cisco IOS Software may also be affected.
 
IntelliShield Analysis
To exploit this vulnerability, the attacker must authenticate to a targeted system to send malformed authentication header packets. This access requirement limits the possibility of a successful exploit.

Customers are advised to review the bug reports 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 CSCub92025 at the following link: CVE-2013-1241
 
Impact
An authenticated, remote attacker could exploit this vulnerability to cause the ISM module on an affected device to reload, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to improper processing of malformed authentication header packets by the Cisco ISM module for ISR G2 devices running on an affected software release.

An authenticated, remote attacker could exploit this vulnerability by sending a stream of malformed authentication header packets over an established IPsec security association. If successful, the attacker could cause the affected module to reload, 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.

Restrict privileged management access to devices to prevent information disclosure and unauthorized access. Ensure security features such as Management Plane or Control Plane Protection are applied to a device. For best practices for securing interactive management sessions, consult Cisco Guide to Harden Cisco IOS Devices.

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 15.3T 15.3(1)T, 15.3(1)T1, 15.3(1)T2, 15.3(1)T3, 15.3(1)T4, 15.3(2)T, 15.3(2)T1, 15.3(2)T2, 15.3(3)T, 15.3(100)T, 15.3(200)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.
Powered by  IntelliShield