The decentralized finance (DeFi) protocol Uniswap (UNI) missed a potential disaster: Blockchain security firm Dedaub found a critical flaw in one of the recent features implemented on the protocol that has since been patched.
A potential disaster averted in Uniswap
Dedauba company specializing in blockchain security, found a critical flaw in a decentralized trading smart contract (DES) uniswap (UNITED).
The fault was localized at the level of theUniversal router, a feature implemented last November by Uniswap, which allows users of the protocol to trade NFTs and tokens in a single transaction.
The Dedaub team disclosed a critical vulnerability to the Uniswap team!
Funds are safe – Uniswap has addressed the issue and redistributed Universal Router smart contracts across its chains 👏
Vulnerability allows reentry to drain user funds, mid-tx.
— Dedaub (@dedaub) January 2, 2023
According to Dedaub, the code for the Universal Router feature did not include a “lockout” feature to prevent a malicious third party operate the code during a transaction being processed on Uniswap.
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Therefore, without this security measure, a skilled hacker could have intercepted the transferred assets for a certain period of time in the related smart contract. According to Dedaub, however, this only concerned the assets immobilized in the smart contract.
The defect was reported as quickly as possible by the Dedaub teams, Uniswap teams fixed this unintentional error immediately and awarded blockchain security company with a bug bounty of 40,000 USDC.
Uniswap initially rated this error as “medium” as it required a user to complete a transaction that included both tokens and at least one NFT intended for a stranger or an unreliable personwhich indeed seems unlikely.
Rewards of this type are now commonplace within the cryptocurrency ecosystem, whether they are decentralized projects or not. To take place, this allows the different infrastructures to optimize their security while resorting to auditing firms, which is not always sufficient.
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