The remote host is missing an update to postgresql announced via advisory DSA 577-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20577-1

Trustix Security Engineers identified insecure temporary file creation in a script included in the postgresql suite, an object-relational SQL database. This could lead an attacker to trick a user to overwrite arbitrary files he has write access to. For the stable distribution (woody) this problem has been fixed in version 7.2.1-2woody6. For the unstable distribution (sid) this problem has been fixed in version 7.4.6-1. We recommend that you upgrade your postgresql packages.