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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.

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