The remote host is missing an update to request-tracker3.4/request-tracker3.6 announced via advisory DSA 1944-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201944-1

Mikal Gule discovered that request-tracker, an extensible trouble-ticket tracking system, is prone to an attack, where an attacker with access to the same domain can hijack a user's RT session. For the stable distribution (lenny), this problem has been fixed in version 3.6.7-5+lenny3. For the oldstable distribution (etch), this problem has been fixed in version 3.6.1-4+etch1 of request-tracker3.6 and version 3.4.5-2+etch1 of request-tracker3.4. For the testing distribution (squeeze), this problem will be fixed soon. For the unstable distribution (sid), this problem has been fixed in version 3.6.9-2. We recommend that you upgrade your request-tracker packages.