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[虚拟币交流]
Conic Finance二度被黑!损失超350万美元 代币CNC暴跌(转载)
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去中心化金融(DeFi)协议Curve生态的收益聚合器和流动性管理协议“Conic Finance”
$ C, G, ^8 Y, u5 r- s) d2 p21日晚间以来已爆出遭遇2次黑客攻击,该平台的ETH Omnipool资金池首先遭到漏洞利用。
. k$ `+ O% s* f, ]0 f据区块链安全公司Beosin的监测账号Beosin Alert周五晚间7点左右报告,Conic Finance遭黑客在一笔交易中被2 _* ]: }! Z' Y" {5 C
盗走326万美元资金,约1,727枚以太币,目前全部ETH赃款已被转移到新地址。
3 s$ k5 j. p* p* S黑客重入攻击
. w" a2 E0 @3 L$ B8 a: R# R2 XConic Finance官方随后确认遭到攻击,并宣布于前端禁用ETH Omnipool存款,称没有没有其他Omnipools受* |, i* j! Q" B
到此漏洞的影响,并分析这次事件根本原因是重入攻击,由于对Curve V2池中ETH的Curve元注册表返回的地址7 k5 c( l: o$ p2 v( ~) k2 R
存在错误假设,而能够执行攻击。
( e+ H! R9 f" u( l; o8 ^5 w区块链安全公司派盾(Peckshield)初步分析称,漏洞来自Coinic编写的Curve LP Oracle V2合约,他们先前的审计8 P4 R! g: |8 z4 y ^
发现了类似的唯读型重入(read-onlyreentrancy)问题。然而,新推出的Curve LP Oracle V2合约中也出现了同样
4 K( h7 l! B* [4 g/ ?$ C的问题,该合约不属于先前Coinic合约审计范围。1 f3 F8 p" j1 p
Curve则在下回应,由Coinic编写的Curve LP Oracle V2合约算法看似没有错误,可能是设定错误导致漏洞。" }. _1 {, r2 A6 ^
Beosin解释,此次重入攻击,攻击者利用此漏洞来操纵steCRV、cbETH/ETH-f、rETH-f等代币的价格,使得攻击# x# e- n8 R# N3 j ]9 G
者可以转移比他们存入要更多的流动性代币。
4 N3 \8 A$ t, L$ ~Conic Finance遭二度攻击,全面关闭资金池) X) p5 m% e& q( W% z. H
今日凌晨,Conic官方公告关闭所有Omnipool存款,并在早上7点时暂时全面关闭Omnipool。/ F, @$ k' ^9 j2 k) O1 k
“大约四个小时前,我们收到了影响$crvUSD Omnipool的漏洞利用警报。作为对此的回应,并考虑到今天的) x- @% t7 c! s, }0 E# q
ETH Omnipool漏洞,我们立即实施了最大程度的安全措施并暂时关闭了所有Omnipool。”
; n; k, Z2 \9 p: q. O% ?) ~官方后续推文指出,第二次攻击与ETH Omnipool的重入漏洞无关。攻击者通过利用crvUSD Omnipool获利约
! k3 A% R7 O3 w9 \- H30万美元。随后官方发布通知,建议所有用户立即申请退款并撤销对Conic的应用程式批准,并承诺将全额退还
D% u Y( Y- C0 Y, Z2 d用户丢失的代币,还将为符合条件的账户发放1~10,000枚CNC代币作为补偿。3 N' R5 i7 S. M2 X U
CNC币价失血77%
4 H0 B/ K; ]+ @( \5 e% l受黑客攻击事件影响,Defillama数据显示,Conic Finance的总锁仓量(TVL)从1.56亿美元暴跌近67%,目前仅剩
7 E* L) z1 @0 b. S; m/ N5,193万美元;原生代币Conic(CNC)更一度跌超77%至1.34美元,截稿前报2.84美元,近24小时跌幅仍高达4 g, r$ h+ t: J& D# a8 a% ?. `
52.8%。
0 H3 Y# H: h) b0 `/ y. H8 W; Z7 Q$ L% R3 ^" q2 c* z5 m" |, ^ T
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