web3: The Sandbox suspends cross-chain connections between Base and BNB SAND
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The Sandbox Suspension of Additional Issuance Due to Cross-Chain Bridge Exception; Base and BNB Chain Cross-Chain with SAND, Synchronization of Suspension of Related Deposits and Withdrawals on Korean Exchanges.
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The Sandbox 已暂停 Base 和 BNB Smart Chain 上的 SAND 跨链转移。项目方称,攻击者利用其跨链基础设施铸造了没有抵押支持的 SAND,因此先行隔离两条链上的相关代币,并展开调查。

项目方表示,以太坊主网上锁定的底层 SAND 资产仍然安全,合法跨链代币的抵押也未受影响。以太坊和 Polygon 未被波及,用户钱包也没有出现被攻破的情况。

异常增发规模与实际影响

The Sandbox 估计,这次事件的实际影响低于 SAND 总供应量的 0.01%。这一数字与异常铸造的名义规模差距很大。

安全公司 Blockaid 表示,攻击者通过 400 多笔交易铸造了名义价值约 490 亿美元的 SAND。PeckShield 另行监测到,约 149 亿枚 SAND 被铸入两个地址。

Base与BNB链跨链双向暂停

项目方已关闭 Base 和 BNB Smart Chain 的双向转移,阻止这些异常生成的代币通过跨链桥赎回,或回流至以太坊上的抵押资产。

The Sandbox 同时提醒用户,不要在这两条受影响网络上买卖或交易 SAND,因为相关流动性已经受损。项目方正准备基于事发前状态制作快照,并表示将对符合条件的流动性提供者进行补偿。

韩国交易所同步暂停充提

这起事件也引发韩国主要交易所采取措施。Bithumb 于韩国时间 8 月 22 日 11 时 11 分暂停 SAND 充提,Upbit 在 1 分钟后跟进。两家交易所均提到安全风险,并援引韩国《虚拟资产用户保护法》采取措施。

Upbit 一度连以太坊网络上的 SAND 也一并暂停,但 The Sandbox 随后表示,以太坊版本的 SAND 并未暴露在这次漏洞之下。

The Sandbox 表示,待调查完成后将公布完整复盘报告。在跨链功能恢复前,Base 和 BNB Smart Chain 上的 SAND 将继续与未受影响的以太坊和 Polygon 市场分离。

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