[ GLSA 200501-45 ] Gallery: Cross-site scripting vulnerability

[Luke Macken]

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Gentoo Linux Security Advisory GLSA 200501-45
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http://security.gentoo.org/
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Severity: Low
Title: Gallery: Cross-site scripting vulnerability
Date: January 30, 2005
Bugs: #78522
ID: 200501-45

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Synopsis
========

Gallery is vulnerable to cross-site scripting attacks.

Background
==========

Gallery is a web application written in PHP which is used to organize
and publish photo albums. It allows multiple users to build and
maintain their own albums. It also supports the mirroring of images on
other servers.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-apps/gallery <= 1.4.4_p4 >= 1.4.4_p5

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

Rafel Ivgi has discovered a cross-site scripting vulnerability where
the 'username' parameter is not properly sanitized in 'login.php'.

Impact
======

By sending a carefully crafted URL, an attacker can inject and execute
script code in the victim's browser window, and potentially compromise
the user's gallery.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Gallery users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apps/gallery-1.4.4_p5"

References
==========

[ 1 ] Gallery Announcement
http://gallery.menalto.com/modules.php?op=modload&name=News&file=article&sid=147
[ 2 ] Secunia Advisory SA13887
http://secunia.com/advisories/13887/

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

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

http://security.gentoo.org/glsa/glsa-200501-45.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

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[Paul Laudanski]

Thanks for the notification. Lets keep in mind that we don't want to see
another form of the highlight or sanity issue here, as the removeTags is
simply the strip_tags PHP function. As we've seen, not all attacks will
have HTML tags in them.

gallery fix:

$username = htmlspecialchars(removeTags(urldecode($username))) ;

(The same also found in search.php)

phpbb pre-fix:

$words = explode(' ', trim(htmlspecialchars(urldecode($HTTP_GET_VARS['highlight']))));

phpbb fix:

$words = explode(' ', trim(htmlspecialchars($HTTP_GET_VARS['highlight'])));

I have not taken the time to audit the code, but as we've all become
familiar with the raw encoded URL during the wonderful days of Christmas,
it would be a good idea to run a quick test to ensure that base is
covered. So hopefully I'm wrong and just being over-paranoid.

In any case, thanks for the update. Please correct me if I'm off base
while thinking aloud.

On Sun, 30 Jan 2005, Luke Macken wrote:

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> Gentoo Linux Security Advisory GLSA 200501-45
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> http://security.gentoo.org/
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>
> Severity: Low
> Title: Gallery: Cross-site scripting vulnerability
> Date: January 30, 2005
> Bugs: #78522
> ID: 200501-45
>
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>

--
Regards,

Paul Laudanski - Computer Cops, LLC.
CastleCops(SM) - http://castlecops.com
http://justalittlepoke.com | http://cuddlesnkisses.com |
http://zhen-xjell.com