Last week, members of the Ruby community received word that all but the most recent versions of the language contain a serious security hole, and should be upgraded immediately. The announcement indicated that the security problem allows an attacker to potentially execute arbitrary code from a remote location. Other than that general description, what is the problem? Well... the powers that be aren't telling. Zed Shaw, decided to blog about this, announcing the vulnerabilities, as well as the techniques that he used to uncover them.