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【Warning! EIP-7702 Vulnerability Exploited, QNT Reserve Pool Loses Nearly 55 ETH!】A recent smart contract vulnerability incident has attracted widespread market attention. The attacker exploited the EIP-7702 account vulnerability to steal 1,988.5 QNT from the QNT reserve pool, worth approximately 54.93 ETH. The root cause of this attack lies in the lack of permission settings in the management contract of the reserve pool, allowing the attacker to call contract functions without authorization.
Vulnerability analysis:
Attack path: The reserve pool's administrator account EOA delegated code to the Batcecutor contract via the EIP-770 contract, which in turn set the BatchCall contract, with no permission control, as the authorized caller.
Root cause of the vulnerability: Because the BatchCall() function lacks permission verification, any external caller can invoke it, ultimately leading to the illegal extraction of QNT assets from the reserve pool.
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