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://www.daemonology.net/blog/2011-01-18-tarsnap-critical-security-bug.html http://www.vuxml.org/freebsd/2c2d4e83-2370-11e0-a91b-00e0815b8da8.html

The following package is affected: tarsnap