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Vulnerability Alert

Cisco Secure Access Control System Session Fixation Web Vulnerability

 
Threat Type:CWE-200: Information Leak / Disclosure
IntelliShield ID:29345
Version:1
First Published:2013 May 16 15:28 GMT
Last Published:2013 May 16 15:28 GMT
Port: Not available
CVE:CVE-2013-1200
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:6.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.5
 
 
Version Summary:Cisco Secure Access Control System contains a vulnerability that could allow an unauthenticated, remote attacker to gain access to sensitive information. Updates are not available.
 
 
Description
A vulnerability in the web interface of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to acquire the session identifier of another user's session.

The vulnerability is due to the lack of session identifier regeneration. An attacker could exploit this vulnerability by capturing the existing session identifier of an authenticated user. An exploit could allow the attacker to reuse an existing user's session for access to the Cisco Secure ACS web interface.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
At the time this alert was first published, Cisco ACE versions 5.4 and prior were vulnerable. Later versions of Cisco ACE may also be affected.
 
IntelliShield Analysis
It is likely that an attacker would need access to a trusted, internal network in which the targeted device may reside. This access requirement decreases the likelihood 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 CSCud95787 at the following link: CVE-2013-1200
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to gain access to sensitive information by reusing an existing user's session for access to an affected device's web interface.
 
Technical Information
The vulnerability is due to the lack of session identifier regeneration in the web interface of Cisco ACS while running on affected software versions.

An unauthenticated, remote attacker could exploit this vulnerability by capturing the existing session identifier of a targeted, authenticated user. If successful, the attacker can reuse the targeted user's session to gain access to the targeted system's web interface.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

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

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators are advised to monitor affected systems.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco Secure Access Control System (ACS) 5.3 Base, .0.6, .0.40, .0.40.1, .0.40.2, .0.40.3, .0.40.4, .0.40.5, .0.40.6, .0.40.7 | 5.4 Base

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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