web3: BounceBit shuts down its own public chain after being attacked and migrates to BB
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1h ago
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BounceBit closes its own public chain due to an authorization vulnerability; BB will migrate to BNB Chain. The abnormally transferred 286.5 million tokens will not be counted towards the new supply.
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BounceBit宣布永久关闭其自有 Layer 1 区块链,此前网络授权系统出现漏洞,导致约 2.865 亿枚 BB 被异常转移。项目方表示,后续不会重建原链,而是把 BB 重新发行到 BNB Chain,改为 BEP-20 代币继续流通。

漏洞发生在授权系统

这次事件发生后,BounceBit已在区块高度 20,702,857 停止出块。团队称,问题出在基于 Evmos 的底层系统,漏洞允许攻击者在未经账户持有人授权的情况下,将其他地址指定为资金来源,并从 9 个主网账户转出约 286,543,148 枚 BB。

BounceBit表示,这次事件并非私钥泄露,也不是签名被伪造,钱包和交易所账户本身也没有遭到入侵。问题集中在链本身的软件授权逻辑。

新 BB 按攻击前快照发放

项目方早期曾考虑修复网络,但随后决定不再重建或升级原有 Layer 1。一个重要原因是,BounceBit所采用的 Evmos 代码库已停止维护,继续恢复原链的成本和复杂度都较高。

按照项目方案,新的 BB 余额将基于区块高度 20,697,260 的快照计算,也就是首次未经授权转账发生之前的状态。攻击者转移的约 2.865 亿枚 BB 不会被纳入新代币供应。

  • 停止出块高度:20,702,857
  • 快照区块高度:20,697,260
  • 异常转移数量:286,543,148 枚 BB

项目方称,用户无需手动申请新代币,系统计划自动把对应余额发放到用户的 BNB Chain 地址。质押中和解绑中的 BB,也将按照攻击前快照处理。

多数产品继续在 BNB Chain 运行

BounceBit表示,关闭自有公链并不意味着整个项目停止运营。团队称,其多数产品本来就围绕 BNB Chain 展开,用户活跃度也主要集中在该链上。

项目方还表示,CeDeFi、Prime 和 RWA 相关产品未受此次事件影响,后续将继续运行。团队同时提醒用户,不要点击非官方迁移链接,也不要与假冒合约交互,交易所对新 BB 代币的支持仍在协调中。

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