Within a few hours of CloudFlare launching its Heartbleed Challenge the truth was out. Not only did Heartbleed leak private session information (such as cookies and other data that SSL should have been protecting), but the crown jewels of an HTTPS web server were also vulnerable: the private SSL keys
The Hidden Costs of Heartbleed
A quick followup to our last blog post on our decision to reissue and revoke all of CloudFlare's customers' SSL certificates. One question we've received is why we didn't just reissue and revoke all SSL certificates as soon as we got word about
The Heartbleed Aftermath: all CloudFlare certificates revoked and reissued
Eleven days ago the Heartbleed vulnerability was publicly announced. Last Friday, we issued the CloudFlare Challenge: Heartbleed and simultaneously started the process of revoking and reissuing all the SSL certificates that CloudFlare manages for our customers. That process is now complete. We have revoked and reissued every single certificate we
Certificate Revocation and Heartbleed
As you may have noticed, the CloudFlare Heartbleed Challenge has been solved. The private key for the site cloudflarechallenge.com has been obtained by several authorized attackers via the Heartbleed exploit. Any person who obtained the private key will be able to impersonate cloudflarechallenge.com, as Fedor Indutny demonstrated when
The Results of the CloudFlare Challenge
Earlier today we announced the Heartbleed Challenge. We set up a nginx server with a vulnerable version of OpenSSL and challenged the community to steal its private key. The world was up to the task: two people independently retrieved private keys using the Heartbleed exploit. The first valid submission was
Answering the Critical Question: Can You Get Private SSL Keys Using Heartbleed?
Update: Below is what we thought as of 12:27pm UTC. To verify our belief we crowd sourced the investigation. It turns out we were wrong. While it takes effort, it is possible to extract private SSL keys. The challenge was solved by Software Engineer Fedor Indutny and Ilkka Mattila