strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.
lists.fedoraproject.org/pipermail/package-announce/2015-August/164276.html
lists.fedoraproject.org/pipermail/package-announce/2015-August/164278.html
www.securityfocus.com/bid/76861
bugzilla.redhat.com/show_bug.cgi?id=1222815
www.strongswan.org/blog/2015/06/01/strongswan-vulnerability-%28cve-2015-3991%29.html