The remote host is missing an update to migrationtools announced via advisory DSA 1187-1. Jason Hoover discovered that migrationtools, a collection of scripts to migrate user data to LDAP creates several temporary files insecurely, which might lead to denial of service through a symlink attack.
For the stable distribution (sarge) this problem has been fixed in version 46-1sarge1. For the unstable distribution (sid) this problem has been fixed in version 46-2.1. We recommend that you upgrade your migrationtools package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201187-1