Vulnerability identifier: #VU33960

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-3627

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ClamAV
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: ClamAV

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The bytecode engine in ClamAV before 0.97.3 allows remote attackers to cause a denial of service (crash) via vectors related to "recursion level" and (1) libclamav/bytecode.c and (2) libclamav/bytecode_api.c.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ClamAV: 0.97.0 - 0.97.2

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External links
http://git.clamav.net/gitweb?p=clamav-devel.git;a=commitdiff;h=3d664817f6ef833a17414a4ecea42004c35cc42f
http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068940.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068941.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068942.html
http://secunia.com/advisories/46717
http://secunia.com/advisories/46826
http://www.openwall.com/lists/oss-security/2011/10/18/1
http://www.securityfocus.com/bid/50183
http://www.ubuntu.com/usn/USN-1258-1
http://bugzilla.redhat.com/show_bug.cgi?id=746984

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.