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TITLE:
Drupal Link Module "description" Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA33835

VERIFY ADVISORY:
http://secunia.com/advisories/33835/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Drupal Link Module 5.x
http://secunia.com/advisories/product/21341/

DESCRIPTION:
A vulnerability has been discovered in the Link module for Drupal,
which can be exploited by malicious users to conduct script insertion
attacks.

Input passed via the "description" parameter in index.php (when "q"
is set to "admin/content/types/[TYPE NAME]/fields/[FIELD NAME]") is
not properly sanitised before being used. This can be exploited to
insert arbitrary HTML and script code, which will be executed in a
user's browser session in the context of an affected site when the
malicious type is viewed.

Successful exploitation of this vulnerability requires the
"administer content types" permission.

This vulnerability is confirmed in version 5.x-2.5. Other versions
may also be affected.

SOLUTION:
Grant the "administer content types" privilege to trusted users
only.

Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
Andrew Rosborough and Justin C. Klein Keane.

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