Apache 2.0: Denial of Service by memory consumption

Security Team Contact Address

Updated November 10, 2004

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200411-18 / apache
Release Date	November 10, 2004
Latest Revision	December 30, 2007: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-servers/apache	< 2.0.52-r1	>= 2.0.52-r1, < 2.0	All supported architectures

Related bugreports: #70138

Synopsis

A flaw in Apache 2.0 could allow a remote attacker to cause a Denial of Service.

2. Impact Information

Background

The Apache HTTP Server is one of the most popular web servers on the Internet.

Description

Chintan Trivedi discovered a vulnerability in Apache httpd 2.0 that is caused by improper enforcing of the field length limit in the header-parsing code.

Impact

By sending a large amount of specially-crafted HTTP GET requests a remote attacker could cause a Denial of Service of the targeted system.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Apache 2.0 users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/apache-2.0.52-r1"

4. References