Check Point Advisories

Microsoft ISAPI W3Who Library Buffer Overflow (CVE-2004-1134)

Check Point Reference: CPAI-2005-341
Date Published: 18 Feb 2010
Severity: Critical
Last Updated: Thursday 18 February, 2010
Source:
Industry Reference:CVE-2004-1134
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable?
Vulnerability Description The W3Who dynamically linked library (DLL), when used in the context of an IIS HTTP server, provides various information about the current HTTP client, as well as the current running environment. It is included with the Internet Services Application Programming Interface (ISAPI) and is meant to be used as a debugging and information tool for troubleshooting client connections. There exists a buffer overflow vulnerability in the W3Who library, which is part of the Microsoft Internet Server Application Programming Interface (ISAPI). The flaw is caused by a lack of sanitization of the parameters passed to the library as CGI variables. An attacker may exploit this vulnerability to execute arbitrary code on the target system with the same privilege level of the IIS out-of-process administrator account. Not available.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

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

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Microsoft ISAPI W3Who Library Buffer Overflow protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Microsoft ISAPI W3Who library buffer overflow

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