A smart contract of SushiSwap, a decentralized finance (DeFi) protocol, suffered a breach, resulting in a loss of $3.3 million. Only users who have interacted with certain SushiSwap smart contracts in the past two weeks may be affected.
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A SushiSwap smart contract has a flaw
A smart contract of the decentralized finance protocol (DeFi) SushiSwap has been the victim of a flaw, resulting in $3.3 million in losses, according to the latest estimate at the time of writing. This sum would come, on its own, from user 0xSifuwell known in the crypto ecosystem on Twitter.
Sushi’s RouteProcessor2 contract has an approval bug; please revoke approval ASAP. We’re working with security teams to mitigate the issue. https://t.co/WhXJfa5xD4
— Jared Gray (@jaredgrey) April 9, 2023
According to @0xngmi, developer of the DefiLlama platform, only users who have interacted with some SushiSwap smart contracts in the last 2 weeks may be affected. The latter has also developed a website allowing you to check if your address or addresses are potentially at risk.
If one of your addresses was indeed in danger, we recommend that you withdraw the authorizations concerned as soon as possible. To do this, you can use Revoke or do it manually from some digital wallets that support this tool natively like Rabby Wallet.
According to Kevin Peng, analyst at The Block Research, only 190 Ethereum addresses approved the problematic smart contract. However, more than 200 addresses would be affected on layer 2 Arbitrum, and other addresses are also affected on other blockchains. If you want to manually check the contracts for each blockchain, you can find their respective address here.
The price of the SUSHI token found itself slightly impacted, with a drop of just over 5% over 24 hours.
Evolution of the price of the SUSHI token
The blockchain security and auditing firm BlockSec revealed that it successfully intercepted 100 ETH on block 17007839. Moreover, the first attacker, who therefore seems to be a “white hat”, would have already returned 90 of the 100 ETH.
At the time of writing these lines, neither SushiSwap nor its director Jared Gray gave further news regarding the flaw..
👉 Read also – Is DeFi the next target for US regulators?
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Passionate about the world of decentralized finance and the novelties brought by Web 3.0, I write articles for Cryptoast to help make blockchain more accessible to everyone. Convinced that cryptocurrencies will change the future very soon.
Maximilien Prue
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