We added Pion DTLS to Anthropic's OSS scanner last week (https://github.com/anthropics/oss-scanner/pull/93), and today we woke up to a report with 36 bugs, including 6 security vulnerabilities: 2 critical, 3 high, and 1 moderate. Four of them affect WebRTC.

Some of these vulnerabilities have been sitting in the codebase for over 4 years, surviving years of testing and security scans. It's funny that our inboxes are constantly spammed with AI-generated security reports from people using Codex and Claude, most of which flag pointless issues. Yet somehow, none of them caught these.

The funniest part? Anthropic also found 3 bugs that OpenAI's internal code review missed. I had asked OpenAI to review a new DTLS API since they use Pion and had a use case for it in SPED. Their review didn't flag any bugs. Anthropic found an authentication issue, a deadlock, and a TLS KeyUpdate bug (Maybe their model ignored this one because it's not a WebRTC issue). Luckily, the API hasn't been released yet. The fixes: https://github.com/pion/dtls/pull/1236

Here are the security advisories for the CVEs Anthropic found (all of them are pre-chatgpt!):

Critical: DTLS handshake signature confusion allows peer impersonation - https://github.com/pion/dtls/security/advisories/GHSA-7c2r-jhm9-43vf

Critical: Client authentication bypass through premature session caching - https://github.com/pion/dtls/security/advisories/GHSA-hhpj-h56m-9f2p

High: Client authentication bypass with shared session stores - https://github.com/pion/dtls/security/advisories/GHSA-cqhp-ggp7-58qj

High: Unbounded handshake cache allows remote memory exhaustion - https://github.com/pion/dtls/security/advisories/GHSA-jm57-r6vj-mwg9

High: Oversized RSA keys allow CPU exhaustion - https://github.com/pion/dtls/security/advisories/GHSA-jp25-wc3w-p9xp

Moderate: Repeated certificate verification allows CPU exhaustion - https://github.com/pion/dtls/security/advisories/GHSA-qpgj-64qg-5m4r

The most annoying part is that neither company's models were willing to help with verifying or filtering the bugs, so we had to manually review them one by one (Spent all day :/