FreeBSD Security Advisory (FreeBSD-SA-09:03.ntpd.asc)

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-09:03.ntpd.asc
Upgrade your system to the appropriate stable release or security branch dated after the correction date
The ntpd daemon is an implementation of the Network Time Protocol (NTP) used to synchronize the time of a computer system to a reference time source. FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. The EVP_VerifyFinal() function from OpenSSL is used to determine if a digital signature is valid. When ntpd(8) is set to cryptographically authenticate NTP data it incorrectly checks the return value from EVP_VerifyFinal().