From: Secunia Security Advisories (sec-advsecunia.com)
Date: Wed Dec 19 2007 - 17:07:05 CST

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TITLE:
Dokeos "My productions" Multiple Extensions File Upload Vulnerability

SECUNIA ADVISORY ID:
SA28154

VERIFY ADVISORY:
http://secunia.com/advisories/28154/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
From remote

SOFTWARE:
Dokeos 1.x
http://secunia.com/product/4508/

DESCRIPTION:
A vulnerability has been discovered in Dokeos, which can be exploited
by malicious users to compromise a vulnerable system.

The vulnerability is caused due to an error in the handling of file
uploads to "My productions" under "My profile", if a filename has
multiple file extensions (e.g. "file.php.1"). This can be exploited
to upload and execute arbitrary PHP code.

Successful exploitation requires valid user credentials and an
certain server configuration (e.g. an Apache server with the
"mod_mime" module installed).

The vulnerability is confirmed in version 1.8.4. Other versions may
also be affected.

SOLUTION:
Grant only trusted users access to the application.

Restrict access to the "main/upload/users/" directory (e.g. with
".htaccess"). This will however break the download functionality.

PROVIDED AND/OR DISCOVERED BY:
RoMaNcYxHaCkEr and an anonymous person

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/4753

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