CVE-2023-23934 | Date: (C)2023-02-16 (M)2023-12-22 |
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.
CVSS Score and Metrics +CVSS Score and Metrics -CVSS V3 Severity: | CVSS V2 Severity: |
CVSS Score : 3.5 | CVSS Score : |
Exploit Score: 2.1 | Exploit Score: |
Impact Score: 1.4 | Impact Score: |
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CVSS V3 Metrics: | CVSS V2 Metrics: |
Attack Vector: ADJACENT_NETWORK | Access Vector: |
Attack Complexity: LOW | Access Complexity: |
Privileges Required: NONE | Authentication: |
User Interaction: REQUIRED | Confidentiality: |
Scope: UNCHANGED | Integrity: |
Confidentiality: NONE | Availability: |
Integrity: LOW | |
Availability: NONE | |
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