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TITLE:
KGB "skinnn" Local File Inclusion Vulnerability

SECUNIA ADVISORY ID:
SA23768

VERIFY ADVISORY:
http://secunia.com/advisories/23768/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
KGB 1.x
http://secunia.com/product/12168/

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

Input passed to the "skinnn" parameter in kgbmod/sesskglogadmin.php
is not properly verified before being used to include files. This can
be exploited to include arbitrary files from local resources via
directory traversal attacks or to execute arbitrary PHP code by
including kg/wpisy.txt, which contains guestbook entries.

Successful exploitation requires that "register_globals" is enabled
and "magic_quotes_gpc" is disabled.

The vulnerability is reported in version 1.9. Other versions may also
be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Kacper

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/3134

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About:
This Advisory was delivered by Secunia as a free service to help
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vulnerabilities.

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