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TITLE:
Fusion SBX "is_logged" Authentication Bypass

SECUNIA ADVISORY ID:
SA15257

VERIFY ADVISORY:
http://secunia.com/advisories/15257/

CRITICAL:
Highly critical

IMPACT:
Security Bypass, System access

WHERE:
>From remote

SOFTWARE:
Fusion SBX 1.x
http://secunia.com/product/5068/

DESCRIPTION:
dave has reported a vulnerability in Fusion SBX, which can be
exploited by malicious people to bypass certain security restrictions
and compromise a vulnerable system.

The vulnerability is caused due to insecure use of the "extract()"
function in "index.php". This can be exploited to bypass the
authentication process by setting the "is_logged" parameter.

This can further be exploited to execute arbitrary PHP script code
via e.g. the "maxname2" parameter.

The vulnerability has been reported in version 1.2 and prior.

SOLUTION:
Edit the source code to ensure that the authentication process is
performed properly and ensure that input is properly verified.

PROVIDED AND/OR DISCOVERED BY:
dave

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