The remote host is missing an update to nfs-utils announced via advisory DSA 349-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20349-1

The logging code in nfs-utils contains an off-by-one buffer overrun when adding a newline to the string being logged. This vulnerability may allow an attacker to execute arbitrary code or cause a denial of service condition by sending certain RPC requests. For the stable distribution (woody) this problem has been fixed in version 1:1.0-2woody1. For the unstable distribution (sid) this problem has been fixed in version 1:1.0.3-2. We recommend that you update your nfs-utils package.