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Category:   Application (Security)  >   avast! Vendors:   ALWIL Software
avast! 'aavmker4.sys' IOCTL Processing Bug Lets Local Users Deny Service
SecurityTracker Alert ID:  1023644
SecurityTracker URL:  http://securitytracker.com/id/1023644
CVE Reference:   CVE-2010-0705   (Links to External Site)
Updated:  Mar 2 2010
Original Entry Date:  Feb 23 2010
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.8, 5.0 prior to 5.0.418
Description:   A vulnerability was reported in avast!. A local user can cause denial of service conditions.

A local user can send a specially crafted IOCTL request to trigger a memory corruption error in 'aavmker4.sys' and cause the target system to crash.

The vendor was notified on January 24, 2010.

The original advisory is available at:

http://trapkit.de/advisories/TKADV2010-003.txt

Tobias Klein reported this vulnerability.

Impact:   A local user can cause the target system to crash.
Solution:   The vendor has issued a fix (5.0.418).

The vendor's advisory is available at:

http://forum.avast.com/index.php?topic=55484.0

Vendor URL:  www.avast.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Windows (Any)

Message History:   None.


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