The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://eprint.iacr.org/2005/033 http://lists.gnupg.org/pipermail/gnupg-announce/2005q1/000191.html http://www.vuxml.org/freebsd/8375a73f-01bf-11da-bc08-0001020eed82.html

The following package is affected: gnupg CVE-2005-0366 The integrity check feature in OpenPGP, when handling a message that was encrypted using cipher feedback (CFB) mode, allows remote attackers to recover part of the plaintext via a chosen-ciphertext attack when the first 2 bytes of a message block are known, and an oracle or other mechanism is available to determine whether an integrity check failed.