#VU33960 Input validation error in ClamAV - CVE-2011-3627

Vulnerability identifier: #VU33960

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

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