The Corosync Cluster Engine is a Group Communication System with additional features for implementing high availability within applications.
It was discovered that corosync allowed an unauthenticated user to cause a Denial of Service by application crash.
A remote attacker could send a malicious crafted packet, possibly resulting in a Denial of Service condition.
There is no known workaround at this time.
All corosync users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-cluster/corosync-3.0.4"