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Gentoo Linux Security Advisory 200709-16

Gentoo Linux Security Advisory 200709-16
Posted Sep 28, 2007
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200709-16 - Mattias Bengtsson and Philip Olausson have discovered a buffer overflow vulnerability in the function fcgi_env_add() in the file mod_fastcgi.c when processing overly long HTTP headers. Versions less than 1.4.18 are affected.

tags | advisory, web, overflow
systems | linux, gentoo
advisories | CVE-2007-4727
MD5 | af386920d4c2d8806df005d9b44aca48

Gentoo Linux Security Advisory 200709-16

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Gentoo Linux Security Advisory GLSA 200709-16
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http://security.gentoo.org/
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Severity: High
Title: Lighttpd: Buffer overflow
Date: September 27, 2007
Bugs: #191912
ID: 200709-16

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Synopsis
========

Lighttpd is vulnerable to the remote execution of arbitrary code.

Background
==========

Lighttpd is a lightweight HTTP web server.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-servers/lighttpd < 1.4.18 >= 1.4.18

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

Mattias Bengtsson and Philip Olausson have discovered a buffer overflow
vulnerability in the function fcgi_env_add() in the file mod_fastcgi.c
when processing overly long HTTP headers.

Impact
======

A remote attacker could send a specially crafted request to the
vulnerable Lighttpd server, resulting in the remote execution of
arbitrary code with privileges of the user running the web server. Note
that mod_fastcgi is disabled in Gentoo's default configuration.

Workaround
==========

Edit the file /etc/lighttpd/lighttpd.conf and comment the following
line: "include mod_fastcgi.conf"

Resolution
==========

All Lighttpd users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.18"

References
==========

[ 1 ] CVE-2007-4727
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4727

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

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

http://security.gentoo.org/glsa/glsa-200709-16.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 2007 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/2.5
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