Vulnerability identifier: #VU32677

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-2053

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Openswan
Server applications / Remote access servers, VPN

Vendor: openswan.org

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (pluto IKE daemon crash) and possibly execute arbitrary code via crafted DNS TXT records.

Mitigation
Update to version 2.6.39.

Vulnerable software versions

Openswan: 2.6.01 - 2.6.38

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External links
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00008.html
http://rhn.redhat.com/errata/RHSA-2013-0827.html
http://www.debian.org/security/2014/dsa-2893
http://www.securityfocus.com/bid/59838
http://bugzilla.redhat.com/show_bug.cgi?id=960229
http://lists.libreswan.org/pipermail/swan-announce/2013/000003.html
http://www.openswan.org/news/13

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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.