Check Point Advisories

Apache HTTPD mod_log_config Cookie Handling Denial of Service (CVE-2012-0021)

Check Point Reference: CPAI-2012-167
Date Published: 10 May 2012
Severity: High
Last Updated: Sunday 19 April, 2015
Source:
Industry Reference:CVE-2012-0021
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description A denial of service vulnerability has been reported in Apache HTTPD server. The vulnerability is due to a NULL pointer dereference error while logging crafted HTTP requests by mod_log_config. A remote attacker can exploit this issue by continuously sending HTTP requests containing specially crafted Cookie headers to the target server. Successful exploitation could cause the server to crash, resulting in a complete denial of service condition.

Protection Overview

This protection will detect and block specially crafted HTTP requests sent to the server.

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 Apache HTTPD mod_log_config Cookie Handling Denial of Service 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:  Apache HTTPD mod_log_config Cookie Handling Denial of Service

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