The remote host is missing an update to krb5 announced via advisory DSA 1367-2.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201367-2

It was discovered that a buffer overflow of the RPC library of the MIT Kerberos reference implementation allows the execution of arbitrary code. The original patch from DSA-1367-1 didn't address the problem fully. This update delivers an updated fix. The oldstable distribution (sarge) is not affected by this problem. For the stable distribution (etch) this problem has been fixed in version 1.4.4-7etch4. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you upgrade your Kerberos packages.