Vulnerabilities in pkg:npm/posix

PACKAGE
Advisory Identifier: GHSA-27mx-gchc-6xjp
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Advisory Summary

CVE-2022-21211 is a HIGH (CVSS 7.5) unhandled crash vulnerability (CWE-252: Unchecked Return Value) affecting Posix libraries in the npm ecosystem. The issue involves unhandled crash in npm posix. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/posix

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/posix. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-27mx-gchc-6xjp CVE-2022-21211 HIGH Unhandled crash in npm posix

CVE-2022-21211 at a Glance

CVE Identifier CVE-2022-21211
GHSA Identifier GHSA-27mx-gchc-6xjp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-252: Unchecked Return Value
Affected Product Posix
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:N/A:H).

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 None (I:N)
Availability High (A:H)

How to Fix CVE-2022-21211

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

posix fixed: Latest secure release 
npm install posix@Latest secure release
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 posix

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-21211, inspect your project dependencies using npm:

npm ls posix

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

Note: The npm ls posix 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-252: Unchecked Return Value, where the product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. In Posix, 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

This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.

CVE-2022-21211 Affected Posix Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
posix
npm/posix
npm
≤ 4.2.0

References

NVD — CVE-2022-21211 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-21211
Posix Source Repository REPOSITORY
https://github.com/ohmu/node-posix
snyk.io/vuln/snyk-js-posix-... WEB
https://snyk.io/vuln/SNYK-JS-POSIX-2400719

Frequently Asked Questions

What is CVE-2022-21211?
CVE-2022-21211 is a security vulnerability in Posix involving Unhandled crash in npm posix under CWE-252: Unchecked Return Value.
Which Posix versions are affected?
Affected versions include releases prior to current release patches across affected packages: posix.
What version fixes CVE-2022-21211?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is posix affected?
Yes, posix is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2022-21211?
CVE-2022-21211 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:N/A:H.
What CWE is associated with CVE-2022-21211?
CVE-2022-21211 is classified under CWE-252: Unchecked Return Value (The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.).
How can I check npm dependencies for CVE-2022-21211?
Run the dependency tree command: 'npm ls posix'. 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-27mx-gchc-6xjp",
  "modified" : "2022-06-17T00:40:15Z",
  "published" : "2022-06-11T00:00:17Z",
  "aliases" : [ "CVE-2022-21211" ],
  "summary" : "Unhandled crash in npm posix",
  "details" : "This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "posix"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-21211"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ohmu/node-posix"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-POSIX-2400719"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-252" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-17T00:40:15Z",
    "nvd_published_at" : "2022-06-10T20:15:00Z"
  }
}