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事件发生时,多名用户发现自己的NFT被人以极低的价格买入,并迅速被高价转卖。例如,众所周知,无聊猿目前的最低售价为19.8万美元,然而,某用户的无聊猿却被人以1800美元的价格买走,并在20分钟后以19.6万美元的价格出售。显然,攻击者利用了Opensea平台的漏洞,低买高卖他人的NFT以赚取高额差价。被低买高卖的NFT资产包括Bored Ape Yacht Club、Mutant Ape Yacht Club、Cool Cats和Cyberkongz NFTs等。例如,Bored Ape Yacht Club NFT #9991就在25日7点左右被利用该漏洞以0.77ETH的极低价格购入,随后以84.2ETH的正常价格再度出售。
除了OpenSea外,另一家主流NFT交易市场Rarible也遭到了同样形式的攻击。据悉,这两个NFT市场之所以受到同样攻击,是因为Rarible也使用了来自OpenSea的某个用来上架NFT的API,这一API存在漏洞,使得挂单出现异常。在正常挂单情况下,出售NFT时的签名信息会暂存在OpenSea的服务器上,这一数据可以通过API进行访问,并且会在交易正常完成后作废。但由于机制上的漏洞,在OpenSea已经完成交易的挂单有可能仍处于活动状态,一旦NFT的买者将NFT转回OpenSea,这一点会被黑客利用,以原来的报价买入NFT。由于此前报价是在该NFT价格还很低时产生的,黑客得以使用超低价格买入NFT,在用市价迅速卖出。
事件发生时,多位利益受损的用户在社交媒体上焦急地寻求帮助。下图即是前文所提及的Bored Ape Yacht Club NFT #9991的原有主人。此外,还有多位用户都称自己的NFT被以过期的价格买走。
This page is not intended for residents and citizens of Spain, Cuba, Bolivia, Venezuela and other Spanish-speaking jurisdictions listed in the Restricted Locations related terms of Gate.io's User Agreement.Español
This page is not intended for residents and citizens of France, Canada and other French-speaking jurisdictions listed in the Restricted Locations related terms of Gate.io's User Agreement.Français (Afrique)