The remote host is missing an update to kernel-source-2.4.27 announced via advisory DSA 921-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20921-1

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. The following matrix explains which kernel version for which architecture fix the problems mentioned above: Debian 3.1 (sarge) Source 2.4.27-10sarge1 Alpha architecture 2.4.27-10sarge1 ARM architecture 2.4.27-2sarge1 Intel IA-32 architecture 2.4.27-10sarge1 Intel IA-64 architecture 2.4.27-10sarge1 Motorola 680x0 architecture 2.4.27-3sarge1 Big endian MIPS architecture 2.4.27-10.sarge1.040815-1 Little endian MIPS architecture 2.4.27-10.sarge1.040815-1 PowerPC architecture 2.4.27-10sarge1 IBM S/390 architecture 2.4.27-2sarge1 Sun Sparc architecture 2.4.27-9sarge1 We recommend that you upgrade your kernel package immediately and