The remote host is missing updates announced in advisory TSLSA-2004-0008.
A hole was discovered in the mremap. Through this hole, it is possible for anyone with a local account on the system to gain root privileges. See CVE-2004-0077 for additional details. This is the kernel 2.2.25 counterpart to the security hole fixed in TSLSA-2004-0007.
Solution: Update your system with the packages as indicated in the referenced security advisory.