TITLE:
PunBB Private Message System Module Two Vulnerabilities

SECUNIA ADVISORY ID:
SA13201

VERIFY ADVISORY:
http://secunia.com/advisories/13201/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Private Message System (module for PunBB) 1.x
http://secunia.com/product/4255/

DESCRIPTION:
Digital-X has reported two vulnerabilities in Private Message System
module for PunBB, which can be exploited by malicious people to
conduct cross-site scripting attacks and disclose sensitive
information.

1) Input passed to the "tid" parameter in "message_send.php" isn't
properly sanitised before being returned to the user. This can be
exploited to execute arbitrary HTML and script code in a user's
browser session in context of a vulnerable site.

2) The ownership of private messages isn't properly verified in
"message_send.php". This can be exploited to view private messages,
which belong to another user.

The vulnerabilities have been reported in version 1.1.3. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised and
that only the owners of a message can view it.

PROVIDED AND/OR DISCOVERED BY:
Digital-X

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