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Gentoo Linux Security Advisory                           GLSA 200508-07
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                                            http://security.gentoo.org/
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  Severity: High
     Title: AWStats: Arbitrary code execution using malicious Referrer
            information
      Date: August 16, 2005
      Bugs: #102145
        ID: 200508-07

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Synopsis
========

AWStats fails to validate certain log input, which could lead to the
execution of arbitrary Perl code during the generation of the
statistics.

Background
==========

AWStats is an advanced log file analyzer and statistics generator. In
HTTP reports it parses Referrer information in order to display the
most common Referrer values that caused users to visit the website.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-www/awstats        < 6.5                               >= 6.5

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

When using a URLPlugin, AWStats fails to sanitize Referrer URL data
before using them in a Perl eval() routine.

Impact
======

A remote attacker can include arbitrary Referrer information in a HTTP
request to a web server, therefore injecting tainted data in the log
files. When AWStats is run on this log file, this can result in the
execution of arbitrary Perl code with the rights of the user running
AWStats.

Workaround
==========

Disable all URLPlugins in the AWStats configuration.

Resolution
==========

All AWStats users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-www/awstats-6.5"

Note: Users with the vhosts USE flag set should manually use
webapp-config to finalize the update.

References
==========

  [ 1 ] CAN-2005-1527
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1527
  [ 2 ] iDEFENSE Advisory
        http://www.idefense.com/application/poi/display?id=290&type=vulnerabilities

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

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

  http://security.gentoo.org/glsa/glsa-200508-07.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 2005 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/2.0