TITLE:
artmedic newsletter "log.php" PHP Code Injection Vulnerability

SECUNIA ADVISORY ID:
SA20204

VERIFY ADVISORY:
http://secunia.com/advisories/20204/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
artmedic newsletter 4.x
http://secunia.com/product/10092/

DESCRIPTION:
C.Schmitz has discovered a vulnerability in artmedic newsletter,
which can be exploited by malicious people to compromise a vulnerable
system.

Input passed to the "logfile" and "email" parameters in log.php
(version 4.1), respectively newsletter_log.php (version 4.1.2) is not
properly sanitised before being used. This can be exploited to inject
arbitrary PHP code into arbitrary files, which will be executed when
the files are accessed.

Successful exploitation requires that "register_globals" is enabled.

The vulnerability has been confirmed in version 4.1 and 4.1.2. Other
versions may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
C.Schmitz

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