|
Vulnerabilities
< Back

CVE-2023-23934

Updated on 14 Feb 2023

Severity

3.5 Low severity

Details

CVSS score
3.5
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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.

Details

Affected product:
Flask , Werkzeug
Affected packages:
flask @ 0.12.5 (+3 more)
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.

Fixes