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

7.5HIGH

Key Information:

Vendor

Openzeppelin

Status
Openzeppelin-contracts
Vendor
CVE Published:
22 July 2022

What is CVE-2022-31172?

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.

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Affected Version(s)

openzeppelin-contracts >= 4.1.0, < 4.7.1

References

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

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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