The remote host is missing an update to dhcp announced via advisory DSA 1143-1. Justin Winschief and Andrew Steets discovered a bug in dhcp, the DHCP server for automatic IP address assignment, which causes the server to unexpectedly exit.
For the stable distribution (sarge) this problem has been fixed in version 2.0pl5-19.1sarge2. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you upgrade your dhcp package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201143-1