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Two Rights Might Make A Wrong

samczsun.com · 1,991 words · saved by 1 readers

Too much raw fish doesn’t make a better roll of sushi

A common misconception in building software is that if every component in a system is individually verified to be safe, the system itself is also safe. Nowhere is this belief better illustrated than in DeFi, where composability is second nature to developers. Unfortunately, while composing two components might be safe most of the time, it only takes one vulnerability to cause serious financial damage to hundreds if not thousands of innocent users. Today, I’d like to tell you about how I found and helped patch a vulnerability that put over 109k ETH (~350 million USD at today’s exchange rate) at

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