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Insecure Library Loading
Moderately critical

ClamAV Freshclam HTTP Header Buffer Overflow Vulnerability

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Release Date:  2006-05-01    Views:  18,337

Secunia Advisory SA19880

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

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.

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

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: ClamAV Freshclam HTTP Header Buffer Overflow Vulnerability

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