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CertiK:zkSync借贷协议EraLend被攻击事件分析

明明 2023-07-27 14

在 2023 年 7 月 25 日,zkSync Era-based 借贷协议 EraLend 宣布发生了一起安全事件。在初步调查后,CertiK 发现 EraLend 遭到了只读可重入攻击,导致总损失约 270 万美元。

事件概要

EraLend 在 zkSync 主网上遭受了只读可重入攻击。该攻击由地址 0xf1D 07 执行,攻击者利用了闪电贷去操控 EraLend 价格预言机。EraLend 使用 Syncswap 交易对作为价格预言机,其中存在只读可重入漏洞。攻击者能够销毁代币,并在_updateReserves 被调用之前进行回调,导致预言机基于未更新的储备计算价格。

受到攻击的代码,来源 Syncswap Github

EraLend 团队发布了一份声明,称“攻击已经得到控制,攻击者不能再能够继续他们的行动。目前正在评估影响的范围,之后将进一步公布。”建议用户目前不要向 EraLend 存入 USDC。

资产追踪

CertiK 追踪到被盗资金被转移到多个由攻击者控制的 EOA(Externally Owned Address)地址上,涉及以太坊、Arbitrum 和 Optimism 网络。其中大部分资金被整合到以太坊网络的四个钱包中。

CertiK:zkSync借贷协议EraLend被攻击事件分析

含有被盗资金的钱包

有关重入攻击

2020 年数据:

总损失金额:$ 62, 936, 849.00 

总重入攻击次数: 6 

平均每次攻击损失金额(USD++++++++):$ 10, 489, 474.83 

2021 年数据:

总损失金额:$ 67, 924, 596.28 

总重入攻击次数: 7 

平均每次攻击损失金额(USD):$ 9, 703, 513.75 

2022 年数据:

总损失金额:$ 18, 403, 869.53 

总重入攻击次数: 8 

平均每次攻击损失金额(USD):$ 2, 300, 483.69 

2023 年数据:

总损失金额:$ 14, 121, 542.00 

总重入攻击次数: 7 

平均每次攻击损失金额(USD):$ 2, 017, 363.14 

闪电贷攻击:日益增长的威胁

在 2023 年,加密货币和区块链领域的闪电贷攻击日益令人担忧。与 2022 年的 101 起攻击相比,今年已经发生了 128 起事件。这些攻击利用智能合约的漏洞来最大化利润。

闪电贷允许用户在无抵押品的情况下借取大额资金,但必须在同一笔交易内还清贷款。攻击者滥用了这一特性,导致迄今为止总计 2.55 亿美元的损失,平均每起事件损失约为 200 万美元。

在 7 月的头三周内,已经发生了 22 起攻击,导致损失 850 万美元,而 2023 年每月平均闪电贷攻击为 18 起。7 月和 2023 年 2 月各自创下了每月 22 起攻击的记录。这凸显了理解 DeFi 风险和在加密货币领域构建更安全的智能合约的重要性。警惕和预防是在这个波动的领域中安全航行的必要条件。

总结

EraLend 是 CertiK 在 7 月发生的第二大可重入攻击事件,本月由于闪电贷攻击共损失 640 万美元。

到目前为止, 7 月份已经发生了 3 次可重入攻击。7 月份可重入攻击的总损失为 640 万美元,平均每次攻击损失 210 万美元。截至 2023 年,已经发生了 7 次可重入攻击,总损失约为 1410 万美元,平均每次攻击损失 200 万美元。值得注意的是,今年的数据至今仅统计到 7 月份,截至目前 8 月至 12 月尚未报告有关的攻击或损失。到目前为止, 2023 年的总损失可能超过 2022 年的总损失,甚至可能达到 2021 年的水平,因为还有 5 个月的时间。



免责声明:所提供的信息不是交易建议,www.hao76.com对根据本页提供的信息进行的任何投资不承担任何责任。本文内容仅供参考,风险自担!



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    3.914127
    $0.540700
    -7.12%
  • BONK
    BONK
    0.000365
    $0.000050
    -5.84%
  • ROSE
    ROSE
    0.591137
    $0.081660
    +3.40%
  • AXL
    AXL
    5.144033
    $0.710600
    -1.85%
  • AVAV
    AVAV
    0.000000
    $0.000000
    -0.58%
  • ALT
    ALT
    0.828359
    $0.114430
    +4.19%
  • PIXEL
    PIXEL
    1.390612
    $0.192100
    +0.89%
  • JUP
    JUP
    8.075828
    $1.115600
    -2.89%
  • JTO
    JTO
    22.057233
    $3.047000
    +8.74%
  • MANTA
    MANTA
    6.015609
    $0.831000
    +5.08%
  • XAI
    XAI
    1.775003
    $0.245200
    +5.45%
  • PORTAL
    PORTAL
    2.233955
    $0.308600
    +2.08%
  • WLD
    WLD
    16.244316
    $2.244000
    +0.26%
  • ARKM
    ARKM
    14.948535
    $2.065000
    -7.85%
  • PENDLE
    PENDLE
    37.678995
    $5.205000
    +1.60%
  • LOKA
    LOKA
    1.413053
    $0.195200
    -0.80%
  • SUI
    SUI
    25.956158
    $3.585600
    -4.55%
  • MAV
    MAV
    1.363828
    $0.188400
    +1.54%
  • APT
    APT
    87.809070
    $12.130000
    -1.13%
  • RDNT
    RDNT
    0.441579
    $0.061000
    +4.26%
  • HFT
    HFT
    1.433322
    $0.198000
    -0.10%
  • GAL
    GAL
    18.401538
    $2.542000
    -0.58%
  • ANC
    ANC
    0.228101
    $0.031510
    -7.92%
  • HIGH
    HIGH
    10.018776
    $1.384000
    -0.34%
  • MC
    MC
    3.518878
    $0.486100
    -0.42%
  • PEPE
    PEPE
    0.000148
    $0.000021
    +1.40%
  • BICO
    BICO
    2.112340
    $0.291800
    +2.91%
  • BB
    BB
    2.176043
    $0.300600
    +2.55%
  • TRB
    TRB
    486.026460
    $67.140000
    +1.15%
  • AEVO
    AEVO
    2.532926
    $0.349900
    -0.33%
  • PONKE
    PONKE
    4.896238
    $0.676369
    -1.03%
  • TON
    TON
    39.836217
    $5.503000
    +3.97%
  • IOTA
    IOTA
    1.234250
    $0.170500
    +0.00%

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