Rails PoC exploits for CVE-2013-0156 and CVE-2013-0155 Posted by thibaut_barrere on Thursday January 10, 2013 @04:25AM from the ronin-ruby.github.com dept. http://ronin-ruby.github.com/blog/2013/01/09/rails-pocs.html ( 4 comments | 29 points | on HN )
There are at least two YAML parsing libraries (psych/syck) and they both have different behaviours as well.
But a lot of rails 3.x apps are going to be running 1.9.3
You should release your PoC(s) as well.