Amazon Linux AMI Security Advisory: ALAS-2011-6
Advisory Release Date: 2014-09-14 14:25 Pacific
A NULL pointer dereference flaw was found in the way Openswan's pluto IKE daemon handled certain error conditions. A remote, unauthenticated attacker could send a specially-crafted IKE packet that would crash the pluto daemon.
Run yum update openswan to update your system.