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Multiple vulnerabilities in ClamAV may result in a Denial of Service.
Clam AntiVirus is a free anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways.
Damian Put has discovered an out-of-bounds memory access while processing Petite files (CVE-2008-2713, CVE-2008-3215). Also, please note that the 0.93 ClamAV branch fixes the first of the two attack vectors of CVE-2007-6595 concerning an insecure creation of temporary files vulnerability. The sigtool attack vector seems still unfixed.
A remote attacker could entice a user or automated system to scan a specially crafted Petite file, possibly resulting in a Denial of Service (daemon crash). Also, the insecure creation of temporary files vulnerability can be triggered by a local user to perform a symlink attack.
There is no known workaround at this time.
All ClamAV users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.93.3"
[ 1 ] CVE-2007-6595
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6595 [ 2 ] CVE-2008-2713
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2713 [ 3 ] CVE-2008-3215
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