The remote host is missing an update to kernel-source-2.6.8 (2.6.8-17sarge1) announced via advisory DSA 1504-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201504-1

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. For details, please visit the referenced security advisories. The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update: Debian 3.1 (sarge) kernel-image-2.6.8-alpha 2.6.8-17sarge1 kernel-image-2.6.8-amd64 2.6.8-17sarge1 kernel-image-2.6.8-hppa 2.6.8-7sarge1 kernel-image-2.6.8-i386 2.6.8-17sarge1 kernel-image-2.6.8-ia64 2.6.8-15sarge1 kernel-image-2.6.8-m68k 2.6.8-5sarge1 kernel-image-2.6.8-s390 2.6.8-6sarge1 kernel-image-2.6.8-sparc 2.6.8-16sarge1 kernel-patch-powerpc-2.6.8 2.6.8-13sarge1 fai-kernels 1.9.1sarge8 We recommend that you upgrade your kernel package immediately and reboot