Friday, March 25, 2011

Iranian hackers obtain fraudulent HTTPS certificates: How close to a Web security meltdown did we get?

Infosecurity.Com - On March 15th, an HTTPS/TLS Certificate Authority (CA) was tricked into issuing fraudulent certificates that posed a dire risk to Internet security. Based on currently available information, the incident got close to — but was not quite — an Internet-wide security meltdown. As this post will explain, these events show why we urgently need to start reinforcing the system that is currently used to authenticate and identify secure websites and email systems.

There is a post up on the Tor Project's blog by Jacob Appelbaum, analyzing the revocation of a number of HTTPS certificates last week. Patches to the major web browsers blacklisted a number of TLS certificates that were issued after hackers broke into a Certificate Authority. Appelbaum and others were able to cross-reference the blacklisted certificates' serial numbers against a comprehensive collection of Certificate Revocation Lists (these CRL URLs were obtained by querying EFF's SSL Observatory databases) to learn which CA had been affected.     Read More