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CVE-2023-23934

Publication date 14 February 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.5 · Low

Score breakdown

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.

Status

Package Ubuntu Release Status
python-werkzeug 23.04 lunar
Fixed 2.2.2-2ubuntu0.1
22.10 kinetic
Fixed 2.0.2+dfsg1-3ubuntu0.22.10.1
22.04 LTS jammy
Fixed 2.0.2+dfsg1-1ubuntu0.22.04.1
20.04 LTS focal
Fixed 0.16.1+dfsg1-2ubuntu0.1
18.04 LTS bionic
Fixed 0.14.1+dfsg1-1ubuntu0.2
16.04 LTS xenial
14.04 LTS trusty Ignored

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Severity score breakdown

Parameter Value
Base score 3.5 · Low
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N