Red Hat has released Security Advisory RHSA-2008:0855-6 to address a recent security incident. In the advisory, Red Hat indicates that the incident involved an intrusion on several of their computer systems.
During the intrusion, an attacker was able to sign a small number of OpenSSH packages. Red Hat has provided a list of the compromised packages and has released updated versions of the OpenSSH packages as a precautionary measure.
Full details at the link below.