GHSA-2pr6-76vf-7546: Js yaml Denial of Service Vulnerability

MODERATE
Share
CVSS 5.9
CWE-400
Published
Advisory Summary

GHSA-2pr6-76vf-7546 is a MODERATE (CVSS 5.9) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Js yaml libraries in the npm ecosystem. The issue involves denial of service in js-yaml. Remediation is available by upgrading affected packages to version 3.13.0.

GHSA-2pr6-76vf-7546 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2pr6-76vf-7546
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Js yaml
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.9

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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 GHSA-2pr6-76vf-7546

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

js-yaml fixed: 3.13.0 
npm install js-yaml@3.13.0
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 js-yaml

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-2pr6-76vf-7546, inspect your project dependencies using npm:

npm ls js-yaml

Analyze the terminal output to locate any version of Js yaml in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.13.0), your application is affected.

Note: The npm ls js-yaml 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Js yaml, 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

Versions of `js-yaml` prior to 3.13.0 are vulnerable to Denial of Service. By parsing a carefully-crafted YAML file, the node process stalls and may exhaust system resources leading to a Denial of Service. ## Recommendation Upgrade to version 3.13.0.

GHSA-2pr6-76vf-7546 Affected Js yaml Versions

1 component(s)
Fixed Versions:
3.13.0
Product / Package Ecosystem Affected Versions Fixed Version
js-yaml
npm/js-yaml
npm
< 3.13.0
3.13.0

References

Js yaml Source Repository REPOSITORY
https://github.com/nodeca/js-yaml/issues/475
Security Fix Commit FIX COMMIT
https://github.com/nodeca/js-yaml/commit/a567ef3c6e61eb319f0bfc2671d91061afb01235
snyk.io/vuln/snyk-js-jsyaml... WEB
https://snyk.io/vuln/SNYK-JS-JSYAML-173999
www.npmjs.com/advisories/788 WEB
https://www.npmjs.com/advisories/788
www.npmjs.com/advisories/788/vers... WEB
https://www.npmjs.com/advisories/788/versions

Frequently Asked Questions

What is GHSA-2pr6-76vf-7546?
GHSA-2pr6-76vf-7546 is a security vulnerability in Js yaml involving Denial of Service in js-yaml under CWE-400: Uncontrolled Resource Consumption.
Which Js yaml versions are affected?
Affected versions include releases prior to 3.13.0 across affected packages: js-yaml.
What version fixes GHSA-2pr6-76vf-7546?
Upgrading to 3.13.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is js-yaml affected?
Yes, js-yaml is affected in releases prior to 3.13.0. Upgrade your dependency to 3.13.0 or later.
What is the CVSS score of GHSA-2pr6-76vf-7546?
GHSA-2pr6-76vf-7546 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-2pr6-76vf-7546?
GHSA-2pr6-76vf-7546 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for GHSA-2pr6-76vf-7546?
Run the dependency tree command: 'npm ls js-yaml'. 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-2pr6-76vf-7546",
  "modified" : "2021-08-04T21:32:56Z",
  "published" : "2019-06-05T14:35:29Z",
  "aliases" : [ ],
  "summary" : "Denial of Service in js-yaml",
  "details" : "Versions of `js-yaml` prior to 3.13.0 are vulnerable to Denial of Service. By parsing a carefully-crafted YAML file, the node process stalls and may exhaust system resources leading to a Denial of Service.\n\n\n## Recommendation\n\nUpgrade to version 3.13.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "js-yaml"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.13.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nodeca/js-yaml/issues/475"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodeca/js-yaml/commit/a567ef3c6e61eb319f0bfc2671d91061afb01235"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-JSYAML-173999"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/788"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/788/versions"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-06-05T13:52:07Z",
    "nvd_published_at" : null
  }
}