Submitted by kutugu
https://github.com/nounsDAO/nouns-monorepo/blob/718211e063d511eeda1084710f6a682955e80dcb/packages/nouns-contracts/contracts/governance/NounsDAOV3Proposals.sol#L270-L275
https://github.com/nounsDAO/nouns-monorepo/blob/718211e063d511eeda1084710f6a682955e80dcb/packages/nouns-contracts/contracts/governance/NounsDAOV3Proposals.sol#L983
The current version of openzeppelin contracts has a high risk of vulnerability about signature malleability attack: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3610.
So if the signer only cancel one signature, the malicious proposer can still extend a fully valid signature through the previous signature to pass the proposal.
Foundry
Update openzeppelin contracts to the new version.
eladmallel (Nouns DAO) confirmed, but disagreed with severity and commented:
davidbrai (Nouns DAO) commented:
gzeon (judge) decreased severity to Low and commented:
gzeon (judge) increased severity to Medium and commented:
