USN-2450-1: strongSwan vulnerability

5 January 2015

strongswan vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS


strongSwan could be made to crash if it received specially crafted network traffic.

Software Description

  • strongswan - IPsec VPN solution


Mike Daskalakis discovered that strongSwan incorrectly handled IKEv2 payloads that contained the Diffie-Hellman group 1025. A remote attacker could use this issue to cause the IKE daemon to crash, resulting in a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.10
strongswan-ike - 5.1.2-0ubuntu3.2
Ubuntu 14.04 LTS
strongswan-ike - 5.1.2-0ubuntu2.2

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.