The Backend Engineering Show with Hussein Nasser cover image

The Cloudflare mTLS vulnerability - A Deep Dive Analysis

The Backend Engineering Show with Hussein Nasser

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Cloudfit's Fix for Session Resumption

The vulnerability resulted from a bug whereby certificate or evocations that were not checked for session resumption. Instead of rolling on their own data structure to store the certificate themselves and rely on manually updating that, they're just relying on the underlining X509 certificate to always get us this. In March 2021, we introduced the new feature, right? The ability to revoke MTLS certificate in December 16, right? And they tell you the exact same terms.

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