The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-05:20.cvsbug.asc

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-05:20.cvsbug.asc

cvsbug(1) is a utility for reporting problems in the CVS revision control system. It is based on the GNATS send-pr(1) utility. A temporary file is created, used, deleted, and then re-created with the same name. This creates a window during which an attacker could replace the file with a link to another file. While cvsbug(1) is based on the send-pr(1) utility, this problem does not exist in the version of send-pr(1) distributed with FreeBSD.