The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: freeradius
CVE-2009-3111 The rad_decode function in FreeRADIUS before 1.1.8 allows remote attackers to cause a denial of service (radiusd crash) via zero-length Tunnel-Password attributes. NOTE: this is a regression error related to CVE-2003-0967.
Solution: Update your system with the appropriate patches or software upgrades.