highLogic errorEVM-Solidity
Biconomy: Paymaster ETH can be drained with malicious sender
- Payout
- $0
- Protocol
- Biconomy
- Disclosed
- Mar 3, 2023
- Source
- code4rena
In Biconomy's ERC-4337 implementation, the VerifyingSingletonPaymaster verified user operation signatures without maintaining an internal record of previously consumed hash digests, relying instead on the user account's nonce sequence. A user could upgrade the …
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References
- https://github.com/code-423n4/2023-01-biconomy-findings/issues/151
- https://github.com/code-423n4/2023-01-biconomy-findings
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