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TITLE:
signkorn Guestbook "dir_path" File Inclusion Vulnerability

SECUNIA ADVISORY ID:
SA21878

VERIFY ADVISORY:
http://secunia.com/advisories/21878/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
signkorn Guestbook 1.x
http://secunia.com/product/11933/

DESCRIPTION:
SHiKaA has reported a vulnerability in signkorn Guestbook, which can
be exploited by malicious people to compromise a vulnerable system.

Input passed to the "dir_path" parameter in includes/log.inc.php is
not properly verified before being used to include files. This can be
exploited to execute arbitrary PHP code by including files from local
or external resources.

Successful exploitation requires that "register_globals" is enabled.

The vulnerability has been reported in version 1.3. Other versions
may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
SHiKaA

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/2354

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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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