mediumBridge exploitEVM-Solidity
zkSync: User might be able to double withdraw during migration
- Payout
- $0
- Protocol
- zkSync
- Disclosed
- May 29, 2024
- Source
- code4rena
During zkSync Era's three-step L1 bridge migration, a user could withdraw the same ERC20 funds twice. Because L1ERC20Bridge.sol is upgraded and its funds migrated to L1SharedBridge only at the final step, a withdrawal whose L2 batch number equals or exceeds th …
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References
- https://github.com/code-423n4/2024-03-zksync-findings/issues/34
- https://github.com/code-423n4/2024-03-zksync-findings
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