Uniswap’s not too long ago launched bug bounty program has uncovered a hard and fast vulnerability within the protocol’s Common Router sensible contract.
The automated market maker launched two new sensible contracts to its platform in November 2022. Permit2 that permits token approvals to be shared and managed throughout completely different purposes, whereas the Common Router unifies the change of ERC-20 and non-fungible (NFT) tokens right into a single transaction router.
Uniswap additionally introduced a profitable bug bounty program to determine potential vulnerabilities in its sensible contracts in the direction of the top of 2022, because it sought to make sure the safety and effectiveness of its protocol.
The sensible contract safety and auditing firm, Dedaub, introduced that it had obtained a bug bounty after detecting a vulnerability within the Common Router sensible contract that may have allowed a reentrancy assault to empty consumer funds mid-transaction.
The Dedaub group has disclosed a Essential vulnerability to the Uniswap group!
Funds are protected – Uniswap addressed the problem and redeployed the Common Router sensible contracts on all its chains
The vulnerability permits re-entertrancy to empty the consumer’s funds, mid-tx.
— Dedaub (@dedaub) January 2, 2023
In line with Dedaub’s abstract, the Common Router contract permits customers to carry out numerous actions, together with exchanging a number of tokens and NFTs in a single transaction.
The contract incorporates a scripting language for all kinds of token actions, which may embody transfers to 3rd social gathering recipients. If applied appropriately, transfers would go to the recipient inside the specified parameters.
Nevertheless, Dedaub recognized a vulnerability the place third-party code was used in the course of the switch, permitting the code to re-enter the Common Router contract and take any tokens that have been quickly within the contract.
Dedaub then urged a easy resolution, advising the Uniswap group so as to add a reentrancy lock to the principle execution of the brand new sensible contract. Uniswap awarded the auditing agency a complete of $40,000 for figuring out the vulnerability. The quantity included a 33% bonus for reporting the problem in the course of the Uniswap bonus interval in November 2022.
Uniswap categorized the problem as medium severity, whereas a subsequent evaluation deemed the vulnerability to be of excessive impression and low chance. In line with Dedaub, the opportunity of a consumer instantly sending NFTs to an untrusted recipient was thought of consumer error.
Extra advanced and fewer doubtless eventualities have been thought of legitimate for re-entry, leading to Uniswap contemplating the vector as having a low chance. BoxNews contacted Uniswap to study extra particulars about its open bounty program, the quantities paid out, and the variety of flaws recognized so far.
Bug bounties have grow to be commonplace within the cryptocurrency and blockchain area as platforms and enterprises strive to make sure the safety of their software program, programs, and infrastructure.
The cryptocurrency change, Coinbase not too long ago clarified the phrases of its bug bounty program, whereas blockchain safety agency, Immunefi, has facilitated over $65 million price of bug bounties amongst moral hackers and Web3 corporations by 2022.
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