The remote host is missing an update to samba announced via advisory DSA 1291-2.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201291-2

This update to DSA-1291 covers the old stable version of Debian, 3.1 (sarge). The current stable distribution, 4.0 (etch) was updated previously. Several issues have been identified in Samba, the SMB/CIFS file- and print-server implementation for GNU/Linux. CVE-2007-2446 Various bugs in Samba's NDR parsing can allow a user to send specially crafted MS-RPC requests that will overwrite the heap space with user defined data. CVE-2007-2447 Unescaped user input parameters are passed as arguments to /bin/sh allowing for remote command execution For the old stable distribution (sarge), these problems have been fixed in version 3.0.14a-3sarge6 We recommend that you upgrade your samba package.