Leaderboard
56All-time rank
Qubit
Jan 28, 2022
$80.0M
Lost
$80.0M
Recovered
$0
Net loss
$80.0M
Unrecovered0% recovered
On January 27-28, 2022 an attacker drained $80 million from Qubit Finance's QBridge cross-chain bridge by calling the deposit function with a zero address token and no ETH, exploiting improper use of call() instead of SafeERC20 verification to bypass input validation. 5M in BTC-B, and stablecoins.
How the exploit worked
View reproducible PoCsafeTransferFrom() does not revert.
Lost: $80 million
Source: DeFiHackLabs (SunWeb3Sec)
- Target
- Bridge
- Classification
- Input Validation
- Technique
- Missing Input Validation
- Attribution
- Unknown
- Chains
BSC
Event timeline
- Jan 28, 2022Exploit executed — $80.0M drained via missing input validation
- Attributed to Unknown
- Recovery status Unrecovered 0%
Data credits
- DefiLlamaIncident record, amounts, chains, recovery data and logo
- DeFiHackLabsExploit analysis and reproducible proof-of-concept (by SunWeb3Sec)