Vesper Lend on Rari Fuse Pool #23 exploited when Uniswap v3 oracle returned infinite VUSD price due to missing bounds checking. Attacker claimed unlimited collateral and borrowed ~$3.37M in miscellaneous assets.

According to official sources, the No. 23 loan pool VesperLendbeta on the DeFi protocol RariFuse was attacked. The attacker consumed a large amount of VUSD liquidity in Uniswapv3, and created a VUSD/USDC liquidity pool to manipulate the oracle VUSD price feed function and raise the VUSD price. After lending a large amount of assets on VesperLend, the final profit was 3 million US dollars. At present, Vesper has officially suspended the borrowing of the functions of VUSD and vVSP on the RariFuse platform, and is working closely with Rari, Year and Uniswap to investigate the full impact of the attack. The investigation results and response measures will be updated in the future.