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Gentoo Linux Security Advisory GLSA 200708-11
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http://security.gentoo.org/
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Severity: Normal
Title: Lighttpd: Multiple vulnerabilities
Date: August 16, 2007
Bugs: #185442
ID: 200708-11

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Synopsis
========

Several vulnerabilities were reported in Lighttpd, most of them
allowing a Denial of Service and potentially the remote execution of
arbitrary code.

Background
==========

Lighttpd is a lightweight HTTP web server.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-servers/lighttpd < 1.4.16 >= 1.4.16

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

Stefan Esser discovered errors with evidence of memory corruption in
the code parsing the headers. Several independent researchers also
reported errors involving the handling of HTTP headers, the mod_auth
and mod_scgi modules, and the limitation of active connections.

Impact
======

A remote attacker can trigger any of these vulnerabilities by sending
malicious data to the server, which may lead to a crash or memory
exhaustion, and potentially the execution of arbitrary code.
Additionally, access-deny settings can be evaded by appending a final /
to a URL.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Lighttpd users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.16"

References
==========

[ 1 ] CVE-2007-3946
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3946
[ 2 ] CVE-2007-3947
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3947
[ 3 ] CVE-2007-3948
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3948
[ 4 ] CVE-2007-3949
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3949
[ 5 ] CVE-2007-3950
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3950

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

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

http://security.gentoo.org/glsa/glsa-200708-11.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 (at) gentoo (dot) org [email concealed] 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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