mediumSignature replayEVM-Solidity
Biconomy: Cross-Chain Signature Replay Attack
- Payout
- $0
- Protocol
- Biconomy
- Disclosed
- Mar 3, 2023
- Source
- code4rena
Biconomy's VerifyingSingletonPaymaster omitted the chain ID from its internal user operation hash calculation in getHash(). Because paymaster signatures did not commit to a specific EVM chain ID, valid sponsorship signatures generated for a user operation on o …
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References
- https://github.com/code-423n4/2023-01-biconomy-findings/issues/466
- https://github.com/code-423n4/2023-01-biconomy-findings
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