Discussing Pre-22.0 Bitcoin Core Vulnerability Disclosures

Brink engineers Gloria Zhao and Niklas Gögge talk through the recently disclosed Bitcoin Core pre-22.0 vulnerabilities.

This continues our previous discussion in Episode 4 on pre-0.21.0 Bitcoin Core Vulnerabilities.

• (0:00) - Introduction
• (1:07) - Background on Bitcoin peer-to-peer address relay
• (4:30) - Bitcoin Core’s AddrMan (address manager) data structure
• (5:37) - Disclosure of remote crash due to addr message spam
• (8:51) - Address spamming observed on the network
• (10:57) - Bitcoin Core #22387 PR to fix addr message spam
• (13:46) - Background on Miniupnp, the UPnP library used by Bitcoin Core
• (15:18) - The bug in Miniupnpc
• (16:33) - Disclosure of the impact of an infinite loop bug in the miniupnp dependency
• (17:50) - Bitcoin Core #20421 PR to fix the infinite loop bug in the miniupnp dependency
• (18:46) - Lessons learned