DeepFlowTech

Aave's rsETH markets on V3 and V4 were frozen due to an attack on KelpDAO to prevent new deposits and loans. Aave stated that its contracts were not exploited and will review lending information to explore ways to cover potential bad debts. The cross-chain bridge of KelpDAO was attacked, resulting in approximately $292 million worth of rsETH being stolen.

On the evening of April 18 at 17:35 (UTC), a wallet that had been used to launder funds via Tornado Cash sent a cross-chain message to LayerZero’s EndpointV2 contract.
The meaning of this message was very simple: a user on one chain wanted to transfer rsETH back to the Ethereum mainnet. As designed by the protocol, LayerZero faithfully conveyed the instruction. The bridge contract that Kelp DAO deployed on the mainnet also, as designed, faithfully carried out the release.
116,500 rsETH—valued at about $292 million at the time—was transferred in a single transaction to an address controlled by the attacker.
The problem was that on the other chain, no one had ever deposited this rsETH. This “cross-chain request” was fabricated out of thin air. LayerZero believed it, and Kelp’s bridge also believed it.
46 minutes later, Kelp’s emergency multisig was still only then able to take action.

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