The remote host is missing an update to systemtap announced via advisory DSA 1755-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201755-1

Erik Sjoelund discovered that a race condition in the stap tool shipped by Systemtap, an instrumentation system for Linux 2.6, allows local privilege escalation for members of the stapusr group. The old stable distribution (etch) isn't affected. For the stable distribution (lenny), this problem has been fixed in version 0.0.20080705-1+lenny1. For the unstable distribution (sid), this problem has been fixed in version 0.0.20090314-2. We recommend that you upgrade your systemtap package.