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.ethereal.com/appnotes/enpa-sa-00020.html http://www.vuxml.org/freebsd/5d51d245-00ca-11da-bc08-0001020eed82.html
Insight
The following packages are affected:
ethereal
ethereal-lite
tethereal
tethereal-lite