optimistic rollup
White hat finds huge vulnerability in ETH to Arbitrum bridge: Wen max bounty?
A self-described white hat hacker has uncovered a “multi-million dollar vulnerability” in the bridge linking Ethereum and Arbitrum Nitro and received a 400 Ether (ETH) bounty for their find. Known as riptide on Twitter, the hacker described the exploit as the use of an initializing function to set their own bridge address, which would hijack all incoming ETH deposits from those trying to bridge funds from Ethereum to Arbitrum Nitro. Riptide explained the exploit in a Medium post on Sept. 20: “We could either selectively target large ETH deposits to remain undetected for a longer period of time, siphon up every single deposit that comes through the bridge, or wait and just front-run the next massive ETH deposit.” The hack could have potentially netted tens or even hundreds of millions worth...
