Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.
Reproducible Foundry test fork from SunWeb3Sec/DeFiHackLabs. Clone the repo, run forge test against the file path above, and replay the exploit against a mainnet fork at the historical block. Use for reproduction only — not for live targets.
Qubit, the lending product of QBridge, a BSC ecological decentralized lending project, is suspected to have been hacked. The hackers minted a large amount of xETH collateral and consumed about $80 million in assets in the capital pool. According to SlowMist's analysis, the main reason for this attack is that when the recharge of ordinary tokens and native tokens are implemented separately, when transferring the tokens in the whitelist, it is not checked again whether they are 0 addresses, resulting in The operation that should be recharged through the native recharge function can successfully go through the recharge logic of ordinary tokens. Attack method (per SlowMist): Contract Vulnerability. Reported loss: $ 80,000,000.
- chain
- bsc
- protocol
- Qubit
- bug_class
- logic
- date_occurred
- 2022-01-28
- loss_usd
- $80,000,000
- source_id
- sm:qubit::2022-01-28