Well I actually search for something without a exploit,
tricks like cp /bin/sh over a program called by cron.minutely or
how to inject some code in the bash.bashrc file.
Inject a code in a writable config file usw...
Something like this, its a war game there has to be a vulnerability.
If you still wanna know what Kernel it is: 2.6.27-15-generic
Staff note: There is a modify button, don't double post.