Secunia Security Advisory - Piotr Bania has reported a vulnerability in avast! Antivirus, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain escalated privileges.
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TITLE:
avast! Antivirus Device Driver Memory Overwrite Vulnerability
SECUNIA ADVISORY ID:
SA15495
VERIFY ADVISORY:
http://secunia.com/advisories/15495/
CRITICAL:
Less critical
IMPACT:
Privilege escalation, DoS
WHERE:
Local system
SOFTWARE:
avast! Antivirus 4.x
http://secunia.com/product/5162/
DESCRIPTION:
Piotr Bania has reported a vulnerability in avast! Antivirus, which
can be exploited by malicious, local users to cause a DoS (Denial of
Service) or gain escalated privileges.
The vulnerability is caused due to missing input validation in the
device driver and can be exploited to overwrite arbitrary memory via
signals with specially crafted input.
Successful exploitation allows execution of arbitrary code with
escalated privileges.
The vulnerability has been reported in version 4.6. Other versions
may also be affected.
SOLUTION:
Update to version 4.6.665 or later.
PROVIDED AND/OR DISCOVERED BY:
Piotr Bania
ORIGINAL ADVISORY:
Piotr Bania:
http://pb.specialised.info/all/adv/avast-adv.txt
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