The remote host is missing an update to util-linux announced via advisory DSA 1450-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201450-1

It was discovered that util-linux, Miscellaneous system utilities, didn't drop privileged users and groups in the correct order in the mount and umount commands. This could potentially allow a local user to gain additional privileges. For the stable distribution (etch), this problem has been fixed in version 2.12r-19etch1. For the old stable distribution (sarge), this problem has been fixed in version 2.12p-4sarge2. We recommend that you upgrade your util-linux package.