Secunia

Jean-Sebastien Guay-Leroux has reported a vulnerability in avast!, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the handling of Zoo archives. This can be exploited to cause an infinite loop resulting in high CPU utilisation.

The vulnerability reportedly affects versions prior to 4.7.981 of the Home/Professional edition, 4.7.766 for servers, and 4.7.700 for the Managed Client product.

Solution
Update to the latest versions.
Further details available in Customer Area

Provided and/or discovered by
Jean-Sebastien Guay-Leroux

Changelog
Further details available in Customer Area

Original Advisory
avast!:
http://www.avast.com/eng/avast-4-home_pro-revision-history.html
http://www.avast.com/eng/adnm-management-client-revision-history.html
http://www.avast.com/eng/avast-4-server-revision-history.html

Jean-Sebastien Guay-Leroux:
http://www.guay-leroux.com/projects/zoo-infinite-advisory.txt

Deep Links
Links available in Customer Area