CVE-2021-33503 (High) detected in multiple libraries

[mend-bolt-for-github]

CVE-2021-33503 - High Severity Vulnerability

Vulnerable Libraries - urllib3-1.23-py2.py3-none-any.whl, urllib3-1.21.1-py2.py3-none-any.whl, urllib3-1.24.3-py2.py3-none-any.whl

urllib3-1.23-py2.py3-none-any.whl

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

Library home page: https://files.pythonhosted.org/packages/bd/c9/6fdd990019071a4a32a5e7cb78a1d92c53851ef4f56f62a3486e6a7d8ffb/urllib3-1.23-py2.py3-none-any.whl

Path to dependency file: chatbot_ner/datastore

Path to vulnerable library: /datastore

Dependency Hierarchy:

• ❌ urllib3-1.23-py2.py3-none-any.whl (Vulnerable Library)

urllib3-1.21.1-py2.py3-none-any.whl

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

Library home page: https://files.pythonhosted.org/packages/24/53/f397db567de0aa0e81b211d81c13c41a779f14893e42189cf5bdb97611b2/urllib3-1.21.1-py2.py3-none-any.whl

Path to dependency file: chatbot_ner/requirements.txt

Path to vulnerable library: chatbot_ner/requirements.txt,/datastore

Dependency Hierarchy:

• ❌ urllib3-1.21.1-py2.py3-none-any.whl (Vulnerable Library)

urllib3-1.24.3-py2.py3-none-any.whl

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

Library home page: https://files.pythonhosted.org/packages/01/11/525b02e4acc0c747de8b6ccdab376331597c569c42ea66ab0a1dbd36eca2/urllib3-1.24.3-py2.py3-none-any.whl

Path to dependency file: chatbot_ner/datastore

Path to vulnerable library: /datastore

Dependency Hierarchy:

• ❌ urllib3-1.24.3-py2.py3-none-any.whl (Vulnerable Library)

Found in HEAD commit: 72a48c8801f2708eff686388040667b74459efec

Found in base branch: develop

Vulnerability Details

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Publish Date: 2021-06-29

URL: CVE-2021-33503

CVSS 3 Score Details (7.5)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-q2q7-5pp4-w6pg

Release Date: 2021-05-22

Fix Resolution: urllib3 - 1.26.5

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