CVE-2022-31172: @openzeppelin/contracts OpenZeppelin Contracts's SignatureChecker May Revert Vulnerability

HIGH
Advisory Identifier: GHSA-4g63-c64m-25w9
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CVSS 7.5
CWE-20 CWE-347
Published
Advisory Summary

CVE-2022-31172 is a HIGH (CVSS 7.5) openzeppelin contracts's signaturechecker may revert vulnerability (CWE-20: Improper Input Validation) affecting @openzeppelin/contracts libraries in the npm ecosystem. The issue involves openzeppelin contracts's signaturechecker may revert on invalid eip-1271 signers. Remediation is available by upgrading affected packages to version 4.7.1.

CVE-2022-31172 at a Glance

CVE Identifier CVE-2022-31172
GHSA Identifier GHSA-4g63-c64m-25w9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product @openzeppelin/contracts
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2022-31172

To remediate this vulnerability, upgrade all affected @openzeppelin/contracts dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@openzeppelin/contracts fixed: 4.7.1 
npm install @openzeppelin/contracts@4.7.1
@openzeppelin/contracts-upgradeable fixed: 4.7.1 
npm install @openzeppelin/contracts-upgradeable@4.7.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @openzeppelin/contracts

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-31172, inspect your project dependencies using npm:

npm ls @openzeppelin/contracts

Analyze the terminal output to locate any version of @openzeppelin/contracts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.7.1), your application is affected.

Note: The npm ls @openzeppelin/contracts command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In @openzeppelin/contracts, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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 https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552 ### For more information If you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [security@openzeppelin.com](mailto:security@openzeppelin.com).

CVE-2022-31172 Affected @openzeppelin/contracts Versions

2 component(s)
Fixed Versions:
4.7.1
Product / Package Ecosystem Affected Versions Fixed Version
@openzeppelin/contracts
npm/@openzeppelin/contracts
npm
≥ 4.1.0
< 4.7.1
4.7.1
@openzeppelin/contracts-upgradeable
npm/@openzeppelin/contracts-upgradeable
npm
≥ 4.1.0
< 4.7.1
4.7.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4g63-c64m-25w9
NVD — CVE-2022-31172 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-31172
@openzeppelin/contracts Source Repository REPOSITORY
https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552

Frequently Asked Questions

What is CVE-2022-31172?
CVE-2022-31172 is a security vulnerability in @openzeppelin/contracts involving OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers under CWE-20: Improper Input Validation.
Which @openzeppelin/contracts versions are affected?
Affected versions include releases prior to 4.7.1 across affected packages: @openzeppelin/contracts, @openzeppelin/contracts-upgradeable.
What version fixes CVE-2022-31172?
Upgrading to 4.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @openzeppelin/contracts affected?
Yes, @openzeppelin/contracts is affected in releases prior to 4.7.1. Upgrade your dependency to 4.7.1 or later.
Is @openzeppelin/contracts-upgradeable affected?
Yes, @openzeppelin/contracts-upgradeable is affected in releases prior to 4.7.1. Upgrade your dependency to 4.7.1 or later.
What is the CVSS score of CVE-2022-31172?
CVE-2022-31172 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2022-31172?
CVE-2022-31172 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check npm dependencies for CVE-2022-31172?
Run the dependency tree command: 'npm ls @openzeppelin/contracts'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4g63-c64m-25w9",
  "modified" : "2022-07-21T22:33:37Z",
  "published" : "2022-07-21T22:33:37Z",
  "aliases" : [ "CVE-2022-31172" ],
  "summary" : "OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers",
  "details" : "### Impact\n\n`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.\n\nThe 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.\n\n### Patches\n\nThe issue was patched in 4.7.1.\n\n### References\n\nhttps://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552\n\n### For more information\n\nIf you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [security@openzeppelin.com](mailto:security@openzeppelin.com).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@openzeppelin/contracts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.1.0"
      }, {
        "fixed" : "4.7.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@openzeppelin/contracts-upgradeable"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.1.0"
      }, {
        "fixed" : "4.7.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4g63-c64m-25w9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-31172"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-347" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-21T22:33:37Z",
    "nvd_published_at" : "2022-07-22T04:15:00Z"
  }
}