GLSA 200407-03 - Apache 2: Remote denial of service attack
Posted on: 07/04/2004 04:06 PM

An Apache 2 update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200407-03
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http://security.gentoo.org/
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Severity: Normal
Title: Apache 2: Remote denial of service attack
Date: July 04, 2004
Bugs: #55441
ID: 200407-03

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Synopsis
=======

A bug in Apache may allow a remote attacker to perform a Denial of Service attack. With certain configurations this could lead to a heap based buffer overflow.

Background
=========

The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems. The goal of this project is to provide a secure, efficient and extensible server that provides services in tune with the current HTTP standards.

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

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Package / Vulnerable / Unaffected
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1 net-www/apache <= 2.0.49-r3 >= 2.0.49-r4
< 2

Description
==========

A bug in the protocol.c file handling header lines will cause Apache to allocate memory for header lines starting with TAB or SPACE.

Impact
=====

An attacker can exploit this vulnerability to perform a Denial of Service attack by causing Apache to exhaust all memory. On 64 bit systems with more than 4GB of virtual memory a possible integer signedness error could lead to a buffer based overflow causing Apache to crash and under some circumstances execute arbitrary code as the user running Apache, usually "apache".

Workaround
=========

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version:

Resolution
=========

Apache 2 users should upgrade to the latest version of Apache:

# emerge sync

# emerge -pv ">=net-www/apache-2.0.49-r4"
# emerge ">=net-www/apache-2.0.49-r4"

References
=========

[ 1 ] Georgi Guninski security advisory #70, 2004
http://www.guninski.com/httpd1.html
[ 2 ] CAN-2004-0493
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0493

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

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

http://security.gentoo.org/glsa/glsa-200407-03.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 Technologies, 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/1.0


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