CVE-2022-31172 OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers

2022-07-2113:55:11

CWE-20

GitHub_M

www.cve.org

openzeppelin contracts

signaturechecker

eip-1271

solidity 0.8

abi.decode

smart contract.

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

26.7%

JSON

OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. SignatureChecker.isValidSignatureNow is not expected to 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-1271 as expected. The contracts that may be affected are those that use SignatureChecker to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.

CNA Affected

[
  {
    "product": "openzeppelin-contracts",
    "vendor": "OpenZeppelin",
    "versions": [
      {
        "status": "affected",
        "version": ">= 4.1.0, < 4.7.1"
      }
    ]
  }
]