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code-423n4 / 2024-04-ai-arena-mitigation-findings

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ADD-02 MitigationConfirmed #60

Open c4-bot-5 opened 5 months ago

c4-bot-5 commented 5 months ago

Lines of code

Vulnerability details

C4 issue

ADD-02: L-02 FighterFarm::claimFighters : Ecrecover is known to be vulnerable to signature malleability of this QA Report

Comments

Solidity's ecrecover function, used in the Verification contract, is known to be vulnerable to signature malleability. AI Arena's contracts are not vulnerable to signature malleability, because it's not possible to use the same signed data twice, no matter whether it comes from the original signature or from a different one. The team still decided to change the implementation and use a non-malleable signature recovery method.

Mitigation

PR #8 This commit introduces the use of OpenZeppelin's ECDSA helper library, which prevents signature malleability issues.

Suggestion

None

Conclusion

LGTM

c4-judge commented 5 months ago

jhsagd76 marked the issue as satisfactory