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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.
mend-bolt-for-githubbot
changed the title
CVE-2021-33503 (High) detected in urllib3-1.25.7-py2.py3-none-any.whl
CVE-2021-33503 (High) detected in urllib3-1.25.8-py2.py3-none-any.whl, urllib3-1.25.7-py2.py3-none-any.whl
Sep 14, 2021
mend-bolt-for-githubbot
changed the title
CVE-2021-33503 (High) detected in urllib3-1.25.8-py2.py3-none-any.whl, urllib3-1.25.7-py2.py3-none-any.whl
CVE-2021-33503 (High) detected in urllib3-1.25.7-py2.py3-none-any.whl
Oct 19, 2021
mend-bolt-for-githubbot
changed the title
CVE-2021-33503 (High) detected in urllib3-1.25.7-py2.py3-none-any.whl
CVE-2021-33503 (High) detected in urllib3-1.25.8-py2.py3-none-any.whl, urllib3-1.25.7-py2.py3-none-any.whl
Aug 31, 2022
CVE-2021-33503 - High Severity Vulnerability
Vulnerable Libraries - urllib3-1.25.8-py2.py3-none-any.whl, urllib3-1.25.7-py2.py3-none-any.whl
urllib3-1.25.8-py2.py3-none-any.whl
HTTP library with thread-safe connection pooling, file post, and more.
Library home page: https://files.pythonhosted.org/packages/e8/74/6e4f91745020f967d09332bb2b8b9b10090957334692eb88ea4afe91b77f/urllib3-1.25.8-py2.py3-none-any.whl
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
urllib3-1.25.7-py2.py3-none-any.whl
HTTP library with thread-safe connection pooling, file post, and more.
Library home page: https://files.pythonhosted.org/packages/b4/40/a9837291310ee1ccc242ceb6ebfd9eb21539649f193a7c8c86ba15b98539/urllib3-1.25.7-py2.py3-none-any.whl
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
Found in HEAD commit: 907fa5d0ffb73b19d1e141a677c4f52301544b3f
Found in base branch: master
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:
Suggested Fix
Type: Upgrade version
Origin: GHSA-q2q7-5pp4-w6pg
Release Date: 2021-06-29
Fix Resolution: urllib3 - 1.26.5
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