| Package | Affected versions | Patched versions |
|---|---|---|
| contracts | ≥ 4.0.0, < 4.7.1 | 4.7.1 |
| @openzeppelin/contracts | ≥ 4.0.0, < 4.7.1 | 4.7.1 |
| @openzeppelin/contracts-upgradeable | ≥ 4.0.0, < 4.7.1 | 4.7.1 |
ERC165Checker.supportsInterface is designed to always successfully return a boolean, and under no circumstance revert. However, an incorrect assumption about Solidity 0.8's abi.decode allows some cases to revert, given a target contract that doesn't implement EIP-165 as expected, specifically if it returns a value other than 0 or 1.
The contracts that may be affected are those that use ERC165Checker to check for support for an interface and then handle the lack of support in a way other than reverting.
The issue was patched in 4.7.1.
https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552
If you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [email protected].
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