The remote host is missing an update to samba announced via advisory DSA 600-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20600-1

A vulnerability has been discovered in samba, a commonly used LanManager-like file and printer server for Unix. A remote attacker may be able to gain access to files which exist outside of the share's defined path. Such files must still be readable by the account used for the connection, though. For the stable distribution (woody) this problem has been fixed in version 2.2.3a-14.1. In the unstable (sid) and testing (sarge) distributions this problem was not present. We recommend that you upgrade your samba packages.