Summary
The remote host is missing an update to the system as announced in the referenced advisory.
Solution
Update your system with the appropriate patches or software upgrades.
http://www.redmine.org/news/49
http://www.vuxml.org/freebsd/584c506d-0e98-11e0-b59b-0050569b2d21.html
Insight
The following package is affected: redmine