The remote host is missing an update to kernel-source-2.4.18, kernel-image-2.4.18-1-i386 announced via advisory DSA 413-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20413-1

Paul Starzetz discovered a flaw in bounds checking in mremap() in the Linux kernel (present in version 2.2.x, 2.4.x and 2.6.x) which may allow a local attacker to gain root privileges. For the stable distribution (woody) this problem has been fixed in kernel-source version 2.4.18-14.1 and kernel-images versions 2.4.18-12.1 and 2.4.18-5woody6 (bf) for the i386 architecture. For the unstable distribution (sid) this problem will be fixed soon with newly uploaded packages. We recommend that you upgrade your kernel packages. This problem has