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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@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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