Arbitrum-based decentralized finance (DeFi) protocol Rodeo Finance was exploited for $1.53 million on July 11. The DeFi protocol was exploited utilizing a code vulnerability in its Oracle, resulting in a lack of over 810 Ether (ETH).

In line with information shared by blockchain analytic agency PeckShield, the exploiter later bridged the stolen funds from Arbitrum to Ethereum and swapped 285 ETH for unshETH. The exploiter then deposited the ETH on Eth2 staking. Lastly, the exploiter routed the stolen ETH utilizing the favored mixer service Twister Money, which exploiters typically use as an exit path to obscure the transaction’s footprint.

Motion of funds from Rodeo exploiter. Supply: PeckShield

The exploiter used time-weighted common value oracle manipulation, which is utilized by DeFi protocols to calculate the common value of an asset for a particular timeframe and mitigate value fluctuation attributable to market volatility.

Nevertheless, it presents a vulnerability for exploiters to govern these oracles by artificially skewing the calculated common value of an asset. This enables them to achieve the higher hand and exploit the protocol throughout a transaction.

An exploiter first borrows a big sum of an asset after which artificially manipulates the value to purchase the identical asset at a deflated value. Later, the exploiter returns the mortgage and makes a revenue primarily based on the low value managed by manipulations.

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The exploiter pockets tackle nonetheless holds over 374 ETH, and Etherscan has marked the tackle as linked to the Rodeo exploit. The DeFi protocol had $20 million in whole worth locked (TVL), falling under $500 after the exploit. 

Rodeo Finance TVL put up exploit. Supply: DefiLlama

The exploit additionally tumbled the value of the native token of the DeFi protocol, which dropped by over 53% up to now 24 hours.

DRDO token value tumble put up exploit. Supply: Coingecko

In 2023 alone, there have been 21 recorded incidents of some type of exploit on the Arbitrum Community, with a mixed lack of over $20 million. The most recent exploit of $1.53 million makes it the fifth largest recorded on Aribitrum in 2023. Rodeo Finance was additionally exploited on July 5 for round $89,000 attributable to a vulnerability of their mintProtocolReserves perform.

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