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TITLE:
CMS Made Simple Authentication Bypass and File Inclusion

SECUNIA ADVISORY ID:
SA16654

VERIFY ADVISORY:
http://secunia.com/advisories/16654/

CRITICAL:
Highly critical

IMPACT:
Security Bypass, System access

WHERE:
>From remote

SOFTWARE:
CMS Made Simple 0.x
http://secunia.com/product/5641/

DESCRIPTION:
Filip Groszynski has discovered two vulnerabilities in CMS Made
Simple, which can be exploited by malicious people to compromise a
vulnerable system.

1) It is possible to access the "admin/lang.php" script in the
administration section without being authenticated by defining the
"CMS_ADMIN_PAGE" parameter.

Successful exploitation requires that "register_globals" is enabled.

2) Input passed to the "nls[file][vx][vxsfx]" parameter in
admin/lang.php is not properly verified, before it is used to include
files. This can be exploited to include arbitrary files from external
and local resources.

Successful exploitation requires that "register_globals" is enabled,
and that the user is authenticated as an administrative user.

The vulnerabilities have been confirmed in version 0.10. Other
versions may also be affected.

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

Set "register_globals" to "Off".

PROVIDED AND/OR DISCOVERED BY:
Filip Groszynski

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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