OpenZeppelin Contracts is a library for smart contract development. Versions 4.0.0 until 4.7.1 are vulnerable to ERC165Checker reverting instead of returning `false`. `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 version 4.7.1.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| @openzeppelin/contracts(npm) | 4.0.0 | 4.7.1 | N/A |
| @openzeppelin/contracts-upgradeable(npm) | 4.0.0 | 4.7.1 | N/A |
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