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TITLE:
phpThumb() "fltr[]" Command Injection Vulnerability

SECUNIA ADVISORY ID:
SA39556

VERIFY ADVISORY:
http://secunia.com/advisories/39556/

DESCRIPTION:
A vulnerability has been discovered in phpThumb(), which can be
exploited by malicious people to compromise a vulnerable system.

Input passed via the "fltr[]" parameter to phpThumb.php is not
properly sanitised before being used in a command line argument. This
can be exploited to inject and execute arbitrary shell commands via
specially crafted requests.

Successful exploitation requires that "ImageMagick" is installed.

The vulnerability is confirmed in version 1.7.9. Other versions may
also be affected.

NOTE: This vulnerability can be exploited with
"high_security_enabled" set to "true" by brute forcing the
"high_security_password".

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

PROVIDED AND/OR DISCOVERED BY:
Discovered in the wild, reported by an anonymous person.

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