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://fetchmail.berlios.de/fetchmail-SA-2006-01.txt http://bugs.debian.org/348747 http://www.vuxml.org/freebsd/f11d3b22-88c6-11da-a7b2-0060084a00e5.html

The following package is affected: fetchmail CVE-2006-0321 fetchmail 6.3.0 and other versions before 6.3.2 allows remote attackers to cause a denial of service (crash) via crafted e-mail messages that cause a free of an invalid pointer when fetchmail bounces the message to the originator or local postmaster.