[security-alerts] FW: [SA19880] ClamAV Freshclam HTTP Header Buffer Overflow Vulnerability

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> TITLE:
> ClamAV Freshclam HTTP Header Buffer Overflow Vulnerability
> 
> SECUNIA ADVISORY ID:
> SA19880
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/19880/
> 
> CRITICAL:
> Moderately critical
> 
> IMPACT:
> DoS, System access
> 
> WHERE:
> From remote
> 
> SOFTWARE:
> Clam AntiVirus (clamav) 0.x
> http://secunia.com/product/2538/
> 
> DESCRIPTION:
> 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.
> http://sourceforge.net/project/showfiles.php?group_id=86638&re
> lease_id=407078
> 
> 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
>