The remote host is missing an update to udev announced via advisory DSA 1772-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201772-1

Sebastian Kramer discovered two vulnerabilities in udev, the /dev and hotplug management daemon. CVE-2009-1185 udev does not check the origin of NETLINK messages, allowing local users to gain root privileges. CVE-2009-1186 udev suffers from a buffer overflow condition in path encoding, potentially allowing arbitrary code execution. For the old stable distribution (etch), these problems have been fixed in version 0.105-4etch1. For the stable distribution (lenny), these problems have been fixed in version 0.125-7+lenny1. For the unstable distribution (sid), these problems will be fixed soon. We recommend that you upgrade your udev package.