Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like `=value` instead of `key=value`. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like `=__Host-test=bad` for another subdomain. Werkzeug prior to 2.2.3 will parse the cookie `=__Host-test=bad` as __Host-test=bad`. If a Werkzeug application is running next to a vulnerable or malicious subdomain which sets such a cookie using a vulnerable browser, the Werkzeug application will see the bad cookie value but the valid cookie key. The issue is fixed in Werkzeug 2.2.3.
CVE-2023-23934 - Low Severity Vulnerability
The comprehensive WSGI web application library.
Library home page: https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl
Path to dependency file: /server/requirements.txt
Path to vulnerable library: /server/requirements.txt
Dependency Hierarchy: - Flask-1.1.2-py2.py3-none-any.whl (Root Library) - :x: **Werkzeug-1.0.1-py2.py3-none-any.whl** (Vulnerable Library)
Found in HEAD commit: c421d3348b3d76f3e4cb457a1838cff7bdd726b3
Found in base branch: dev
Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like `=value` instead of `key=value`. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like `=__Host-test=bad` for another subdomain. Werkzeug prior to 2.2.3 will parse the cookie `=__Host-test=bad` as __Host-test=bad`. If a Werkzeug application is running next to a vulnerable or malicious subdomain which sets such a cookie using a vulnerable browser, the Werkzeug application will see the bad cookie value but the valid cookie key. The issue is fixed in Werkzeug 2.2.3.
Publish Date: 2023-02-14
URL: CVE-2023-23934
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Adjacent - Attack Complexity: Low - Privileges Required: None - User Interaction: Required - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://www.cve.org/CVERecord?id=CVE-2023-23934
Release Date: 2023-02-14
Fix Resolution (Werkzeug): 2.2.3
Direct dependency fix Resolution (Flask): 1.1.3
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