Andrey
@web3_4d
Blockchain security researcher in Positive Technologies
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💰 New article by our researcher Andrey Bachurin: "Binance Smart Chain Token Bridge Hack" The article explains the technical details of one of the largest cryptocurrency hacks ever. Read the blog post: swarm.ptsecurity.com/binance-smart-…
A clear example of how errors in the logic of the contract allow to steal funds. It looks like a loophole in a legal contract, only the scale is larger.
2/ The protocol has a flawed migrate() that is exploited to transfer real UniswapV2 liquidity to an attacker-controlled new V3 pair with skewed price, resulting in huge leftover as the refund for profit. Also, the authorized sender check is bypassed by locking any tokens.
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