avast! 4 Home and Professional aavmker4.sys driver privilege escalation
| avast-aavmker4-privilege-escalation (41527) |  High Risk |
Description:
avast! 4 Home and Professional could allow a local attacker to gain elevated privileges on the system, caused by an error in the aavmker4.sys driver. By sending a specially-crafted IOCTL request, an attacker could exploit this vulnerability to overwrite system memory and execute arbitrary code on the system with kernel level privileges.
Platforms Affected:
- Alwil, avast! Home Edition 4.7
- Alwil, avast! Professional Edition 4.7
Remedy:
Upgrade to the latest version of avast! 4 Home or avast! 4 Professional (4.8.1169 or later), available from the avast! Web site. See References.
Consequences:
Gain Privileges
References:
- avast! Changelog, Version 4.8.1169, March 29, 2008, avast! 4 Home/Professional Revision History at http://www.avast.com/eng/avast-4-home_pro-revision-history.html.
- avast! Web site, Download Programs at http://www.avast.com/eng/programs.html.
- Trapkit Security Advisory TKADV2008-002, avast! 4.7 aavmker4.sys Kernel Memory Corruption at http://www.trapkit.de/advisories/TKADV2008-002.txt.
- BID-28502: avast! Home/Professional Local Privilege Escalation Vulnerability
- CVE-2008-1625: aavmker4.sys in avast! Home and Professional 4.7 for Windows does not properly validate input to IOCTL 0xb2d60030, which allows local users to gain privileges via certain IOCTL requests.
- FrSIRT/ADV-2008-1034: avast! Home/Professional aavmker4.sys Privilege Escalation Issue
- SA29605: avast! Home/Professional aavmker4.sys Privilege Escalation
- SECTRACK ID: 1019732: avast! 'aavmker4.sys' Kernel Driver Lets Local Users Gain Elevated Privileges
Reported:
Mar 30, 2008
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