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TITLE:
Sophos Anti-Virus "NtCreateKey()" Hooked Function Denial of Service

SECUNIA ADVISORY ID:
SA29996

VERIFY ADVISORY:
http://secunia.com/advisories/29996/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

SOFTWARE:
Sophos Anti-Virus 7.x
http://secunia.com/product/15621/

DESCRIPTION:
Core Security Technologies has reported a vulnerability in Sophos
Anti-Virus, which can be exploited by malicious, local users to cause
a DoS (Denial of Service).

The vulnerability is caused due to an input validation error when
handling arguments passed to the hooked SSDT function
"NtCreateKey()". This can be exploited to cause a DoS by calling the
affected function with specially crafted arguments.

Successful exploitation requires that the "Block suspicious behavior"
detection is enabled.

The vulnerability affects version 7.x on Windows.

SOLUTION:
The vendor is reportedly working on a fix.

PROVIDED AND/OR DISCOVERED BY:
Damian Saura, Anibal Sacco, Dario Menichelli, Norberto Kueffner, and
Andres Blanco y Rodrigo Carvalho of Core Security Technologies

ORIGINAL ADVISORY:
CORE-2008-0320:
http://www.coresecurity.com/index.php5?module=ContentMod&action=item&id=2249

Sophos:
http://www.sophos.com/support/knowledgebase/article/37810.html

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About:
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