Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability

Bugtraq ID:	36507
Class:	Input Validation Error
CVE:	CVE-2009-3522
Remote:	No
Local:	Yes
Published:	Sep 23 2009 12:00AM
Updated:	Apr 13 2015 09:06PM
Credit:	Giuseppe 'Evilcry' Bonfa'
Vulnerable:	Avast Antivirus 4.8.1351.0
Not Vulnerable:

Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability

Avast! Antivirus is prone to a local privilege-escalation vulnerability.

Local attackers can exploit this issue to execute arbitrary code with superuser privileges and completely compromise the affected computer. Failed exploit attempts will result in a denial-of-service condition.

Avast! Antivirus 4.8.1351.0 is vulnerable; other versions may also be affected.

Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability

UPDATE: Core Security Technologies has developed a working commercial exploit for its CORE IMPACT product. This exploit is not otherwise publicly available or known to be circulating in the wild.

The following proof of concept is available:

• /data/vulnerabilities/exploits/36507.c

Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability

References:

• Avast! Homepage (Avast!)
  
• Avast aswMon2.sys kernel memory corruption and Local Privilege Escalation. ([email protected])