The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: fetchmail
CVE-2008-2711 fetchmail 6.3.8 and earlier, when running in -v -v mode, allows remote attackers to cause a denial of service (crash and persistent mail failure) via a malformed mail message with long headers, which is not properly handled when using vsnprintf to format log messages.
Solution: Update your system with the appropriate patches or software upgrades.