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GoPlus:Lumi Finance 遭襲主因系智能帳戶合約簽名驗證存在缺陷

2026-07-14 16:33:58

ChainCatcher 消息,据 GoPlus 分析,Arbitrum 上的 Lumi Finance 于 7 月 13 日遭攻擊,損失約 27 萬美元。

漏洞源於 Sodium 智能帳戶合約(ERC-4337)中的 validateUserOp 函數在調用 _validateSignature 驗證簽名時存在邏輯缺陷------執行 isValidSignatureNow 時,signer 參數傳遞的是攻擊者地址,調用 ECDSA.tryRecover 出錯後未 revert,轉而調用攻擊合約中的 isValidSignature 函數並通過驗證。攻擊者利用該漏洞在 UserOperation 驗證期間執行 Token approve 操作,未經支付方允許即從多個智能帳戶中獲取 ERC20 代幣的批准權限。

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