. . White hat discovers massive vulnerability in ETH-Arbitrum bridge: Wen maximum bounty?

White hat discovers massive vulnerability in ETH-Arbitrum bridge: Wen maximum bounty?

The ethical exploiter congratulated Arbitrium for the 400 ETH payout but said that such a discovery should be eligible for the maximum prize of roughly 1,500 ETH, or $2 million.

White hat discovers massive vulnerability in ETH-Arbitrum bridge: Wen maximum bounty?
White hat discovers massive vulnerability in ETH-Arbitrum bridge: Wen maximum bounty?


A self-described white hat hacker has uncovered a “multi-million greenback vulnerability” within the bridge linking Ethereum-associated Arbitrum Nitro and received a four hundred Ether (ETH) bounty for his or her find.

referred to as riptide on Twitter, the hacker delineated the exploit because the use of an initializing operates to line their own bridge address, which might hijack all incoming ETH deposits from those making an attempt to bridge funds from Ethereum to Arbitrum Nitro.

Riptide explained the exploit during a Medium post on Tuesday:

"We could either target large ETH deposits to remain hidden for a lengthy period of time, suck up every single deposit that comes via the bridge, or simply wait and simply front-run future large ETH deposits."


The hack might have doubtless weblike tens or maybe many millions value of ETH because the largest deposit riptide recorded within the inbox was 168,000 ETH worth over $225 million, and typical deposits ranged from a thousand to 5000 ETH during a 24-hour period, worth between $1.34 to $6.7 million.

Despite the earning potential from the dirty gains, riptide was glad that the “extremely based mostly Arbitrum team” provided a four hundred ETH bounty, valued at over $536,500. However, they additionally shortly Twitter that such a realized “should be eligible for a soap bounty,” that is worth $2 million.

Neither Arbitrum nor its creator company OffChain Labs has publically commented on the exploit; Cointelegraph contacted OffChain Labs for comment but didn't right away hear back.

Related: ETHW verifies contract weakness exploit, rejects accusations of replay attack


Arbitrum may be a layer-2 Optimistic Rollup resolution for Ethereum, clump batches of transactions before submitting them to the Ethereum network in an attempt to reduce network congestion associated save on fees. Arbitrum Nitro launched on Aug. 31st, an upgrade aimed to change communication between Arbitrum and Ethereum, additionally increasing its dealing output at lower fees.

Similar vogue bridge hacks are prospering for exploiters this year, notably, the $100 million taken from the Horizon Bridge in June and also the recent rover token bridge incident in August, that saw $190 million drained by the initial and “copycat” hackers continuance the exploit.

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