2600 - The Last Hope (2008) - Crippling Crypto - The Debian OpenSSL Debacle.mp4

Jacob Appelbaum, Dino Dai Zovi, Karsten Nohl

In May 2008, a weakness in Debian was discovered which makes cryptographic keys predictable. A Debian-specific patch to OpenSSL broke the pseudo-random number generator two years ago, which led to guessable SSL and SSH keys. The vulnerability allows for impersonation of secure servers, as well as the potential to login to SSH secured systems. Since many popular derivatives like Ubuntu and Xandros are affected, the weak keys are found all over the Internet. The panel will present their approach to generating lists of weak keys using cloud computing and explain how they collected large numbers of SSL certificates of which several thousand are weak.