Technical Description

A vulnerability has been identified in avast!, which could be exploited by local attackers to cause a denial of service. This issue is caused by a memory corruption error in the "aswMon2.sys" driver when processing user-supplied data via IOCTL 0xB2C80018, which could allow malicious users to crash an affected system.

Affected Products

avast! version 4.8.1351.0 and prior

Solution

Upgrade to version 4.8.1356 :
http://www.avast.com/eng/updates.html

References

http://www.vupen.com/english/advisories/2009/2761
http://www.avast.com/eng/avast-4-home_pro-revision-history.html
https://www.evilfingers.com/advisory/index.php

Credits

Vulnerability reported by Giuseppe (Evilcry) Bonfa.

ChangeLog

2009-09-24 : Initial release
2009-09-25 : Updated Description, Severity and solution

Vulnerability Management

Subscribe to VUPEN VNS and receive real-time alerts with CVE, CWE, and CVSS when new advisories or patches relevant to your systems and network configurations are available.

Feedback

If you have additional information or corrections for this security advisory please submit them via our contact form.