TITLE:
FCKeditor File Upload Vulnerability

SECUNIA ADVISORY ID:
SA18767

VERIFY ADVISORY:
http://secunia.com/advisories/18767/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
FCKeditor 2.x
http://secunia.com/product/7973/

DESCRIPTION:
rgod has discovered a vulnerability in FCKeditor, which potentially
can be exploited by malicious people to compromise a vulnerable
system.

The problem is that it is possible to upload arbitrary files to a
location inside the web root if the file extension does not match the
list of denied file extensions. This can e.g. be exploited to upload
and execute a malicious PHP script with the ".php.txt" file
extension.

Successful exploitation requires that file uploads have been enabled
in the "config.php" configuration file (not enabled by default).

The vulnerability has been confirmed in version 2.2 and has also been
reported in version 2.0. Other versions may also be affected.

SOLUTION:
Disable file uploads in "config.php".

PROVIDED AND/OR DISCOVERED BY:
rgod

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