The remote host is missing an update to mantis announced via advisory DSA 1856-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201856-1

It was discovered that the Debian Mantis package, a web based bug tracking system, installed the database credentials in a file with world-readable permissions onto the local filesystem. This allows local users to acquire the credentials used to control the Mantis database. This updated package corrects this problem for new installations and will carefully try to update existing ones. Administrators can check the permissions of the file /etc/mantis/config_db.php to see if they are safe for their environment. The old stable distribution (etch) does not contain a mantis package. For the stable distribution (lenny), this problem has been fixed in version 1.1.6+dfsg-2lenny1. For the unstable distribution (sid), this problem has been fixed in version 1.1.8+dfsg-2. We recommend that you upgrade your mantis package.