Check Point Advisories

Apache Byte-Range Filter Denial of Service (CVE-2005-2728)

Check Point Reference: CPAI-2005-283
Date Published: 25 Jul 2010
Severity: High
Last Updated: Tuesday 22 November, 2011
Source:
Industry Reference:CVE-2005-2728
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Apache HTTP Server is the most widely deployed web servers on the Internet. Apache HTTP server is capable of running on Microsoft Windows and wide variety of Unix-like platforms. The server may be run as a standalone web server, a proxy, or a reverse proxy. There exists a denial of service vulnerability in the Apache HTTP Server byte-range filter. The vulnerability occurs during the handling of requests that include a byte-range value, when HTTP Server is configured to act as a proxy. This flaw can cause the excess consumption of memory resources. A remote attacker can exploit the vulnerability by sending specially crafted HTTP requests to the target server, potentially causing denial of service. A successful attack leveraging this vulnerability can cause Apache httpd to allocate significant amounts of memory. If a malicious user keeps sending the crafted HTTP request to the target host, a denial-of-service occurs.

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 Apache Byte-Range Filter 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:  Apache Server Protection Violation.
Attack Information:  Apache Byte-Range Filter denial of service

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