BlockSec:Arbitrum 上 FutureSwap 协议再遭攻击,重入漏洞致损失 7.4 万美元

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Foresight News 消息,据 BlockSec Phalcon 监测,Arbitrum 上 Futureswap 合约再次遭受攻击,预计损失约 74,000 美元。虽然损失不大,但值得注意的是,此次攻击暴露了一个新的攻击面:重入漏洞。攻击者通过一个包含三天冷却期的两步流程从协议中盗取资金。第一步是铸造阶段,攻击者在流动性提供过程中利用重入漏洞,通过在合约更新内部账目之前重新进入 0x5308fcb1 函数,铸造了大量相对于实际存入资产的 LP 代币。第二步是提款阶段,攻击者在等待完强制的三天提款冷却期后执行了提款,烧毁了非法铸造的 LP 代币以兑换基础抵押品,从而有效地从协议中盗取资产并实现盈利。

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