Vulnerability identifier: #VU33293

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3991

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 execute arbitrary code.

strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

strongSwan: 5.2.2

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164276.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164278.html
http://www.securityfocus.com/bid/76861
http://bugzilla.redhat.com/show_bug.cgi?id=1222815
http://www.strongswan.org/blog/2015/06/01/strongswan-vulnerability-(cve-2015-3991).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.