The remote host is missing an update to krb5 announced via advisory DSA 183-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20183-1

Tom Yu and Sam Hartman of MIT discovered another stack buffer overflow in the kadm_ser_wrap_in function in the Kerberos v4 administration server. This kadmind bug has a working exploit code circulating, hence it is considered serious. The MIT krb5 implementation includes support for version 4, including a complete v4 library, server side support for krb4, and limited client support for v4. This problem has been fixed in version 1.2.4-5woody3 for the current stable distribution (woody) and in version 1.2.6-2 for the unstable distribution (sid). The old stable distribution (potato) is not affected since no krb5 packages are included. We recommend that you upgrade your krb5 packages immediately.