The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: neon28
CVE-2008-3746 neon 0.28.0 through 0.28.2 allows remote servers to cause a denial of service (NULL pointer dereference and crash) via vectors related to Digest authentication, Digest domain parameter support, and the parse_domain function.
Solution: Update your system with the appropriate patches or software upgrades.