The gmp plugin in strongSwan before 5.6.0 allows remote attackers to
cause a denial of service (NULL pointer dereference and daemon crash)
via a crafted RSA signature.
Created strongswan tracking bugs for this issue:
Affects: epel-all [bug 1484010]
Affects: fedora-all [bug 1484009]
The version of strongimcv package shipped with Red Hat Enterprise Linux 7, does not enable the gmp plugin and therefore is not affected by this flaw.