The remote host is missing an update to kernel-source-2.4.27 announced via advisory DSA 922-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20922-1

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 on the vulnerabilities addressed by the missing update, please visit the referenced security advisories. This update also contains a number of corrections for issues that turned out to have no security implication afterwards. The following matrix explains which kernel version for which architecture fix the problems mentioned above: Debian 3.1 (sarge) Source 2.6.8-16sarge1 Alpha architecture 2.6.8-16sarge1 AMD64 architecture 2.6.8-16sarge1 HP Precision architecture 2.6.8-6sarge1 Intel IA-32 architecture 2.6.8-16sarge1 Intel IA-64 architecture 2.6.8-14sarge1 Motorola 680x0 architecture 2.6.8-4sarge1 PowerPC architecture 2.6.8-12sarge1 IBM S/390 architecture 2.6.8-5sarge1 Sun Sparc architecture 2.6.8-15sarge1 We recommend that you upgrade your kernel package immediately and