Gentoo: phpBB Cross-Site Scripting Vulnerability
Posted by Benjamin D. Thomas   
Gentoo phpBB is vulnerable to a cross-site scripting attack that could allow arbitrary scripting code execution.
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Gentoo Linux Security Advisory                           GLSA 200505-10
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: phpBB: Cross-Site Scripting Vulnerability
      Date: May 14, 2005
      Bugs: #90213
        ID: 200505-10

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Synopsis
========

phpBB is vulnerable to a cross-site scripting attack that could allow
arbitrary scripting code execution.

Background
==========

phpBB is an Open Source bulletin board package.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  www-apps/phpBB      < 2.0.15                            >= 2.0.15

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

phpBB is vulnerable to a cross-site scripting vulnerability due to
improper sanitization of user supplied input. Coupled with poor
validation of BBCode URLs which may be included in a forum post, an
unsuspecting user may follow a posted link triggering the
vulnerability.

Impact
======

Successful exploitation of the vulnerability could cause arbitrary
scripting code to be executed in the browser of a user.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All phpBB users should upgrade to the latest version:

    emerge --sync
    emerge --ask --oneshot --verbose ">=www-apps/phpbb-2.0.15"

References
==========

  [ 1 ] BugTraq ID 13344
        http://www.securityfocus.com/bid/13344/info/
  [ 2 ] SecurityTracker ID 1013918
        http://securitytracker.com/id?1013918

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

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

  http://security.gentoo.org/glsa/glsa-200505-10.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