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TITLE:
easy-CMS Multiple File Extensions Vulnerability

SECUNIA ADVISORY ID:
SA20733

VERIFY ADVISORY:
http://secunia.com/advisories/20733/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
easy-CMS 0.x
http://secunia.com/product/10524/

DESCRIPTION:
Liz0ziM has discovered a vulnerability in easy-CMS, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error in the handling of file
uploads where a filename has multiple file extensions. This can be
exploited to upload malicious script files inside the web root (e.g.
a PHP script) via the choose_file.php script.

Example:
[file].php.gif

Successful exploitation may allow execution of script code depending
on the HTTP server configuration (it requires e.g. an Apache server
with the "mod_mime" module installed).

The vulnerability has been confirmed in version 0.1.2. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that files with multiple file
extensions cannot be uploaded.

Move the "Repositories" directory out of the web root.

PROVIDED AND/OR DISCOVERED BY:
Liz0ziM

ORIGINAL ADVISORY:
http://www.biyosecurity.be/bugs/easycms.txt

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