The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: lighttpd
CVE-2008-1531 The connection_state_machine function (connections.c) in lighttpd 1.4.19 and earlier, and 1.5.x before 1.5.0, allows remote attackers to cause a denial of service (active SSL connection loss) by triggering an SSL error, such as disconnecting before a download has finished, which causes all active SSL connections to be lost.
Solution: Update your system with the appropriate patches or software upgrades.