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TITLE:
Anti-Trojan Elite Atepmon.sys IOCTL Handling Vulnerability

SECUNIA ADVISORY ID:
SA32669

VERIFY ADVISORY:
http://secunia.com/advisories/32669/

CRITICAL:
Less critical

IMPACT:
Privilege escalation, DoS

WHERE:
Local system

SOFTWARE:
Anti-Trojan Elite 4.x
http://secunia.com/advisories/product/20456/

DESCRIPTION:
alex has discovered a vulnerability in Anti-Trojan Elite, which can
be exploited by malicious, local users to cause a DoS (Denial of
Service) or potentially gain escalated privileges.

The vulnerability is caused due to the Atepmon.sys driver improperly
validating parameters received via IOCTL code 0x00222494. This can be
exploited to cause a system crash or potentially execute arbitrary
code in kernel space.

Successful exploitation requires that the Anti-Trojan Elite GUI is
not running.

The vulnerability is confirmed in version 4.2.2. Other versions may
also be affected.

SOLUTION:
Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
alex, NT Internals

ORIGINAL ADVISORY:
http://www.ntinternals.org/ntiadv0802/ntiadv0802.html

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