CVE-2023-49803 (High) detected in cors-3.4.3.tgz

[mend-bolt-for-github]

CVE-2023-49803 - High Severity Vulnerability

Vulnerable Library - cors-3.4.3.tgz

Cross-Origin Resource Sharing(CORS) for koa

Library home page: https://registry.npmjs.org/@koa/cors/-/cors-3.4.3.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• oidc-provider-7.14.3.tgz (Root Library)
  • ❌ cors-3.4.3.tgz (Vulnerable Library)

Found in HEAD commit: 6e8408d8e06b1da6360cb50965e4dec09ff975e4

Found in base branch: main

Vulnerability Details

@koa/cors npm provides Cross-Origin Resource Sharing (CORS) for koa, a web framework for Node.js. Prior to version 5.0.0, the middleware operates in a way that if an allowed origin is not provided, it will return an Access-Control-Allow-Origin header with the value of the origin from the request. This behavior completely disables one of the most crucial elements of browsers - the Same Origin Policy (SOP), this could cause a very serious security threat to the users of this middleware. If such behavior is expected, for instance, when middleware is used exclusively for prototypes and not for production applications, it should be heavily emphasized in the documentation along with an indication of the risks associated with such behavior, as many users may not be aware of it. Version 5.0.0 fixes this vulnerability.

Publish Date: 2023-12-11

URL: CVE-2023-49803

CVSS 3 Score Details (8.6)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.cve.org/CVERecord?id=CVE-2023-49803

Release Date: 2023-12-11

Fix Resolution: @koa/cors - 5.0.0

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