[ GLSA 200709-16 ] Lighttpd: Buffer overflow

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• - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200709-16
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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.

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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

Do you need more help?

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  [ 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).

Can we help you?

In addition to our free technical library, Pantek provides professional IT services to companies who utilize Open Source software: Learn more about Pantek's Technical Support offerings Place an order for 24/7/365 Technical Support here Learn more about Pantek, who we are, and what we do Chat with a Live Operator Related securityfocus.com Links bugtraq certification focus-bsd focus-ids focus-ih focus-linux focus-ms focus-sun focus-unix-other focus-virus forensics incidents libnet linux-secnews ms-secnews pen-test secpapers secprog sectools secureshell security-basics securityjobs sf-news vuln-dev webappsec Request more information about Pantek

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

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