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Clamav security vulnerabilities

by Marianna Schmudlach / February 15, 2007 7:27 AM PST

Published: 2007-02-15,
Last Updated: 2007-02-15 23:00:45 UTC
by Maarten Van Horenbeeck (Version: 2)
The Clamav development team released version 0.90 of their open-source antivirus toolkit today. This version contains fixes for security vulnerabilities described in a number of iDefense advisories that were published today.

ClamAV CAB File Denial of Service Vulnerability (CVE-2007-0898)
Remote attackers can perform a service degradation attack by sending a malformed CAB file through a gateway scanner running ClamAV. The vulnerability can prevent ClamAV from scanning archives succesfully by depleting the available local file descriptors. iDefense investigated a number of common setups and observed that in most cases, mails that cannot be scanned will be auto-denied.

ClamAV MIME Parsing Directory Traversal Vulnerability (CVE-2007-0897)
An input validation bug allows a remote user to overwrite files on the system that are owned by the clamd scanner. A potential target mentioned in the advisory is the virus database. By overwriting this file, the scanner's effectiveness against certain threats can be reduced significantly.

More: http://isc.sans.org/

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