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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”
7 l* l0 O! f0 c6 U2 v3 R21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。) T5 j' ]' r- F* q( h
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 e. J- G# b1 B% D o
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。
0 @2 |' A- q* u5 m黑客重入攻击1 Y; h) u& `/ z6 K4 \, X# N
Conic 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6 v* p" C% t8 {1 e/ T$ ]
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0 v& l0 z+ A R
存在错误假设,而能够执行攻击。# B/ U* q# Q' t+ ?0 ?/ a4 E
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
9 k) ^- k$ O: l5 U# `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0 G* _1 z* I0 X! m8 v& V4 F
的问题,该合约不属于先前Coinic合约审计范围。
9 {, @) m( K( d0 W4 C# ECurve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。+ t8 v! R4 b# Q# E* V7 P* Y' t
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
9 W! }5 W6 Q" c: o8 Q3 M者可以转移比他们存入要更多的流动性代币。4 z( N0 k v! v$ o/ T$ P; W% p- z; F
Conic Finance遭二度攻击,全面关闭资金池
0 q5 \# i# g7 [ W, U* A2 _* 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。
) H4 M0 W9 E O/ f n“大约四个小时前,我们收到了影响$crvUSD Omnipool的漏洞利用警报。作为对此的回应,并考虑到今天的8 y/ D* f, I( b, [ y
ETH Omnipool漏洞,我们立即实施了最大程度的安全措施并暂时关闭了所有Omnipool。”) a+ D. y/ a8 i( O' ~
官方后续推文指出,第二次攻击与ETH Omnipool的重入漏洞无关。攻击者通过利用crvUSD Omnipool获利约
+ [/ H" i" y. X9 y30万美元。随后官方发布通知,建议所有用户立即申请退款并撤销对Conic的应用程式批准,并承诺将全额退还# |4 a$ Z- }" ?7 h9 ]/ d& L
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。
9 ]% n7 Z1 {8 R; |7 YCNC币价失血77%' ?" X. Z' Z8 r' v a
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
; p, N6 y f$ ~2 u- f) c5 C+ b5,193万美元;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0 ?7 o7 q" c1 [9 N1 |. E( N6 S6 G
52.8%。
) C7 r. E- C9 h( F& @, x6 u
x# i- K0 T u8 g2 { |
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