Considering that your profile says Debian, you might wanna start-off by reading
this article. As for an unprotected distro, just find one compiled with an old GCC version such as 2.95 or 3.2 and you can be almost certain it won't have
SSP. IIRC, this would be something around the Slackware 9.1 era, so maybe try with that one. That said, I'm closing this thread because there is no way to help you perform buffer overflows without breaking the
LQ Rules.