CVE-2020-7774 (High) detected in y18n-4.0.0.tgz

[mend-bolt-for-github[bot]]

CVE-2020-7774 - High Severity Vulnerability

Vulnerable Library - y18n-4.0.0.tgz

the bare-bones internationalization library used by yargs

Library home page: https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/y18n/package.json

Dependency Hierarchy:

• react-scripts-3.4.3.tgz (Root Library)
  • webpack-dev-server-3.11.0.tgz
    • yargs-13.3.2.tgz
      • :x: y18n-4.0.0.tgz (Vulnerable Library)

Found in HEAD commit: 01d2522e4209e107bda54c059ee7caae1a2713dc

Found in base branch: master

Vulnerability Details

This affects the package y18n before 3.2.2, 4.0.1 and 5.0.5. PoC by po6ix: const y18n = require('y18n')(); y18n.setLocale('proto'); y18n.updateLocale({polluted: true}); console.log(polluted); // true

Publish Date: 2020-11-17

URL: CVE-2020-7774

CVSS 3 Score Details (9.8)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.npmjs.com/advisories/1654

Release Date: 2020-11-17

Fix Resolution (y18n): 4.0.1

Direct dependency fix Resolution (react-scripts): 3.4.4

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