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TITLE:
LS simple guestbook "message" PHP Code Execution

SECUNIA ADVISORY ID:
SA24904

VERIFY ADVISORY:
http://secunia.com/advisories/24904/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
LS simple guestbook 1.x
http://secunia.com/product/13947/

DESCRIPTION:
Gammarays has discovered a vulnerability in LS simple guestbook,
which can be exploited by malicious people to compromise a vulnerable
system.

Input passed to the "message" parameter in index.php is not properly
sanitised before it is written to the posts.txt file, which is
included by the index.php script. This can be exploited to execute
arbitrary PHP code.

The vulnerability is confirmed in version 1. Other versions may also
be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Gammarays

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/3735

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