Title: PHP Nuke User Settings Modification Vulnerability
Severity: MODERATE
Description:
By supplying values for the global variable $user, the remote attacker can cause PHP to execute an SQL query which results in changes to display settings for a specific target user. This is due to a failure to validate user -supplied input to the PHP script.
The exploitable query is as follows:
mysql_query("update users set umode='$mode', uorder='$order', thold='$thold' where uid='$cookie[0]'");
The $mode , $order and $thold variables are PHP global variables which can be supplied by a remote attacker. The uid must be obtained from a cookie that is also provided by the user. Attackers can construct a variable that will be used in place of the cookie and submit it to PHP-Nuke as a http form variable. It is thus possible for an attacker to submit configuration values for an arbitrary user.
Affected Products:
- Francisco Burzi PHP-Nuke 4.3.0
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