OpenZeppelin Contracts's ERC165Checker may revert instead of returning false
CVE-2022-31170

7.5HIGH

Key Information:

Vendor

Openzeppelin

Status
Openzeppelin-contracts
Vendor
CVE Published:
22 July 2022

What is CVE-2022-31170?

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.

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Affected Version(s)

openzeppelin-contracts >= 4.0.0, < 4.7.1

References

https://github.com/OpenZeppelin/openzeppelin-contracts/pu...
x_refsource_MISC
https://github.com/OpenZeppelin/openzeppelin-contracts/se...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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