Vulnerability identifier: #VU42179

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-2013-4564

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libreswan
Universal components / Libraries / Libraries used by multiple products

Vendor: libreswan.org

Description

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

Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE packet.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libreswan: 3.6

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124911.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124928.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124943.html
http://secunia.com/advisories/56276
http://libreswan.org/security/CVE-2013-4564/CVE-2013-4564.txt.asc
http://lists.libreswan.org/pipermail/swan-announce/2013/000007.html

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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.