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                                  CERT-Renater

                       Note d'Information No. 2004/VULN487
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DATE                      : 16/11/2004

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Apache 2.0.

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Gentoo Linux Security Advisory                           GLSA 200411-18
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                                             http://security.gentoo.org/
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   Severity: Normal
      Title: Apache 2.0: Denial of Service by memory consumption
       Date: November 10, 2004
       Bugs: #70138
         ID: 200411-18

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Synopsis
========

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

Background
==========

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

Affected packages
=================

     -------------------------------------------------------------------
      Package         /   Vulnerable   /                     Unaffected
     -------------------------------------------------------------------
   1  net-www/apache      < 2.0.52-r1                      >= 2.0.52-r1
                                                                  < 2.0

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.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Apache 2.0 users should upgrade to the latest version:

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

References
==========

   [ 1 ] CAN-2004-0942
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0942
   [ 2 ] Security vulnerabilities in Apache httpd 2.0
         http://www.apacheweek.com/features/security-20

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

   http://security.gentoo.org/glsa/glsa-200411-18.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0


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