CVE-2021-28363 (Medium) detected in urllib3-1.26.3-py2.py3-none-any.whl

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CVE-2021-28363 - Medium Severity Vulnerability

Vulnerable Library - urllib3-1.26.3-py2.py3-none-any.whl

HTTP library with thread-safe connection pooling, file post, and more.

Library home page: https://files.pythonhosted.org/packages/23/fc/8a49991f7905261f9ca9df5aa9b58363c3c821ce3e7f671895442b7100f2/urllib3-1.26.3-py2.py3-none-any.whl

Path to dependency file: /requirements.txt

Path to vulnerable library: /requirements.txt

Dependency Hierarchy:

• responses-0.8.1-py2.py3-none-any.whl (Root Library)
  • requests-2.25.1-py2.py3-none-any.whl
    • ❌ urllib3-1.26.3-py2.py3-none-any.whl (Vulnerable Library)

Found in HEAD commit: c78c9db7aa4d1fdd1aea6ad4e15a777c07e72d4d

Found in base branch: master

Vulnerability Details

The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.

Publish Date: 2021-03-15

URL: CVE-2021-28363

CVSS 3 Score Details (6.5)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-5phf-pp7p-vc2r

Release Date: 2021-03-15

Fix Resolution: 1.26.4