Omni Bridge

Amount Lost: $271,800.00
Funds Returned: $0.00
Category: Bridge
Date: 2022-9-16

Quick Summary

Omni Bridge was hacked by exploiting a smart contract on the EthereumPoW chain. 200 $WETH was stolen by a replay attack and transferred through Mexc Global.

Details of the Exploit

Omni Bridge is a crosschain bridge. A replay attack was launched against Omni Bridge on the EthereumPoW chain, which resulted in a hacker exploiting 200 $WETH. The hacker was able to withdraw bridged funds from the both EthereumPoS and EthereumPoW chains because the OmniBridge contract failed to validate chainId before approving the transaction.