#VU41794 Improper Authentication in strongSwan - CVE-2014-2338

Vulnerability identifier: #VU41794

Vulnerability risk: Medium

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

CVE-ID: CVE-2014-2338

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
strongSwan
Server applications / Encryption software

Vendor: strongswan.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

IKEv2 in strongSwan 4.0.7 before 5.1.3 allows remote attackers to bypass authentication by rekeying an IKE_SA during (1) initiation or (2) re-authentication, which triggers the IKE_SA state to be set to established.

Mitigation
Install update from vendor's website.

Vulnerable software versions

strongSwan: 4.0.7 - 5.1.2

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External links
https://lists.opensuse.org/opensuse-security-announce/2014-04/msg00010.html
https://lists.opensuse.org/opensuse-updates/2014-05/msg00064.html
https://lists.opensuse.org/opensuse-updates/2014-05/msg00066.html
https://secunia.com/advisories/57823
https://www.debian.org/security/2014/dsa-2903
https://www.securityfocus.com/bid/66815
https://www.strongswan.org/blog/2014/04/14/strongswan-authentication-bypass-vulnerability-%28cve-2014-2338%29.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.