A vulnerability has been reported in ClamAV, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the HTTP client in the Freshclam command line utility. This can be exploited to cause a stack-based buffer overflow when the HTTP headers received from a web server exceeds 8KB.

Successful exploitation requires that Freshclam is used to download virus signature updates from a malicious mirror web server e.g. via DNS poisoning.

The vulnerability has been reported in version 0.80 through 0.88.1.

Solution
Update to version 0.88.2.
Further details available to Secunia VIM customers

Provided and/or discovered by
The vendor credits Ulf Harnhammar and anonymous researcher from Germany.

Original Advisory
http://www.clamav.net/security/0.88.2.html
http://www.clamav.net/doc/0.88.2/ChangeLog

Deep Links
Links available to Secunia VIM customers