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://umn.dl.sourceforge.net/sourceforge/mailman/mailman-2.0.13-2.0.14-diff.txt http://www.vuxml.org/freebsd/b0e76877-67a8-11d8-80e3-0020ed76ef5a.html

The following package is affected: mailman CVE-2003-0991 Unknown vulnerability in the mail command handler in Mailman before 2.0.14 allows remote attackers to cause a denial of service (crash) via malformed e-mail commands.