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Update Protection against Cisco Secure Access Control Server UCP Application CSuserCGI.exe Buffer Overflow Vulnerability

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Check Point Reference: CPAI-2008-131
Date Published:
Severity:
Last Updated:
Source: Secunia Advisory: SA29351
Industry Reference(s): CVE-2008-0532
Protection Provided by: IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Cisco Systems UCP Prior to 4.2
Vulnerability Description
A buffer overflow vulnerability has been discovered in Cisco User-Changeable Password (UCP) application. The Cisco UCP application is used by Cisco Secure Access Control Server (ACS). It allows users to change their ACS passwords with a web-based utility. A remote attacker may exploit this issue to execute arbitrary code on a target system.
Update/Patch Available
Update to versions 4.2:
Cisco
Vulnerability Details
The vulnerability is due to errors in the Cisco UCP application that fails to sufficiently validate input in the executable file CSuserCGI.exe. A remote attacker may exploit this issue by sending a malicious request to a target server. Successful exploitation of this vulnerability will allow the attacker to execute arbitrary code on a vulnerable system by providing a large argument in the request sent to the server.

Protection Overview
By enabling this protection, IPS-1 will detect and block malformed requests sent to the server.

In order for the protection to be activated, update your product to the latest SmartDefense update. For information on how to update SmartDefense, go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

IPS-1 & IPS-1 NGX R65

How Can I Protect My Network?
1. In the IPS-1 Policy Manager, click on the Protection tab.
2. In the Protection tree, click Web Intelligence > WWW 2, and select the CGI Attacks protection group.
3. Click Cisco Secure Access Control Server UCP Application CSuserCGI.exe Buffer Overflow (IPS-1 NGX R65 only).
4. In the configuration pane, under Settings, check Active.
5. Click on Install Policy.

How Do I Know if My Network is Under Attack?
Upon attack, the following entry will be logged:

Alert Name: www2_cgi
Description: www_cgi_cve_2008_0532_alert