#VU32451 Data Handling in strongSwan - CVE-2014-9221

Vulnerability identifier: #VU32451

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-2014-9221

CWE-ID: CWE-19

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 perform service disruption.

strongSwan 4.5.x through 5.2.x before 5.2.1 allows remote attackers to cause a denial of service (invalid pointer dereference) via a crafted IKEv2 Key Exchange (KE) message with Diffie-Hellman (DH) group 1025.

Mitigation
Install update from vendor's website.

Vulnerable software versions

strongSwan: 4.5.0 - 4.5.3

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-March/153825.html
https://lists.opensuse.org/opensuse-updates/2015-01/msg00054.html
https://secunia.com/advisories/62071
https://secunia.com/advisories/62083
https://secunia.com/advisories/62095
https://secunia.com/advisories/62663
https://strongswan.org/blog/2015/01/05/strongswan-5.2.2-released.html
https://strongswan.org/blog/2015/01/05/strongswan-denial-of-service-vulnerability-(cve-2014-9221).html
https://www.debian.org/security/2015/dsa-3118
https://www.securityfocus.com/bid/71894
https://www.ubuntu.com/usn/USN-2450-1

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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.