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

High severity GitHub Reviewed Published Jul 20, 2022 in OpenZeppelin/openzeppelin-contracts • Updated Jan 27, 2023

Package

npm @openzeppelin/contracts (npm)

Affected versions

>= 4.1.0, < 4.7.1

Patched versions

4.7.1
npm @openzeppelin/contracts-upgradeable (npm)
>= 4.1.0, < 4.7.1
4.7.1

Description

Impact

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. We believe this to be unlikely.

Patches

The issue was patched in 4.7.1.

References

OpenZeppelin/openzeppelin-contracts#3552

For more information

If you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [email protected].

References

@frangio frangio published to OpenZeppelin/openzeppelin-contracts Jul 20, 2022
Published to the GitHub Advisory Database Jul 21, 2022
Reviewed Jul 21, 2022
Published by the National Vulnerability Database Jul 22, 2022
Last updated Jan 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.062%
(28th percentile)

Weaknesses

CVE ID

CVE-2022-31172

GHSA ID

GHSA-4g63-c64m-25w9

Source code

No known source code
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