SECUNIA ADVISORY ID: SA23356

VERIFY ADVISORY: http://secunia.com/advisories/23356/

CRITICAL: Highly critical

IMPACT: System access

SOFTWARE: Knowledge Base/mx_kb (module for MxBB Portal) 2.x - http://secunia.com/product/12885/

DESCRIPTION: Dr Max Virus has discovered a vulnerability in the Knowledge Base/mx_kb module for MxBB Portal, which can be exploited by malicious people to compromise vulnerable systems.

Input passed to the "module_root_path" parameter in includes/kb_constants.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from local or external resources. Successful exploitation requires that "register_globals" is enabled. The vulnerability is confirmed in version 2.0.2b. Other versions may also be affected.

SOLUTION: Edit the source code to ensure that input is properly verified.

PROVIDED AND/OR DISCOVERED BY: Dr Max Virus

ORIGINAL ADVISORY: http://www.milw0rm.com/exploits/2924