[ GLSA 200406-16 ] Apache 1.3: Buffer overflow in mod_proxy

[pahud]

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Gentoo Linux Security Advisory GLSA 200406-16
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http://security.gentoo.org/
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Severity: Normal
Title: Apache 1.3: Buffer overflow in mod_proxy
Date: June 21, 2004
Bugs: #53544
ID: 200406-16

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Synopsis
========

A bug in mod_proxy may allow a remote attacker to execute arbitrary
code when Apache is configured a certain way.

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
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-www/apache <= 1.3.31-r1 >= 1.3.31-r2

Description
===========

A bug in the proxy_util.c file may lead to a remote buffer overflow. To
trigger the vulnerability an attacker would have to get mod_proxy to
connect to a malicous server which returns an invalid (negative)
Content-Length.

Impact
======

An attacker could cause a Denial of Service as the Apache child
handling the request, which will die 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 1.x users should upgrade to the latest version of Apache:

# emerge sync

# emerge -pv ">=net-www/apache-1.3.31-r2"
# emerge ">=net-www/apache-1.3.31-r2"

References
==========

[ 1 ] Georgi Guninski security advisory #69, 2004
http://www.guninski.com/modproxy1.html
[ 2 ] CAN-2004-0492
http://cve.mitre.org/cgi-bin/cvename.cg ... -2004-0492

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

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

http://security.gentoo.org/glsa/glsa-200406-16.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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