The remote host is missing an update to linux-2.6 announced via advisory DSA 1494-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201494-1

The vmsplice system call did not properly verify address arguments passed by user space processes, which allowed local attackers to overwrite arbitrary kernel memory, gaining root privileges (CVE-2008-0010, CVE-2008-0600). In the vserver-enabled kernels, a missing access check on certain symlinks in /proc enabled local attackers to access resources in other vservers (CVE-2008-0163). For the stable distribution (etch), this problem has been fixed in version 2.6.18.dfsg.1-18etch1. In addition to these fixes, this update also incorporates changes from the upcoming point release of the stable distribution. The old stable distribution (sarge) is not affected by this problem. The unstable (sid) and testing distributions will be fixed soon. We recommend that you upgrade your linux-2.6 package.