[ GLSA 200709-16 ] Lighttpd: Buffer overflow
Date: Thu, 27 Sep 2007 23:01:46 +0200
From: Pierre-Yves Rofes <py@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200709-16 ] Lighttpd: Buffer overflow
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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
=================
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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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