CVE-2023-23934
Published: 14 February 2023
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.
Priority
Status
Package | Release | Status |
---|---|---|
python-werkzeug Launchpad, Ubuntu, Debian |
trusty |
Ignored
(end of standard support)
|
upstream |
Released
(2.2.3)
|
|
bionic |
Released
(0.14.1+dfsg1-1ubuntu0.2)
|
|
focal |
Released
(0.16.1+dfsg1-2ubuntu0.1)
|
|
jammy |
Released
(2.0.2+dfsg1-1ubuntu0.22.04.1)
|
|
kinetic |
Released
(2.0.2+dfsg1-3ubuntu0.22.10.1)
|
|
xenial |
Released
(0.10.4+dfsg1-1ubuntu1.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
lunar |
Released
(2.2.2-2ubuntu0.1)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 3.5 |
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-23934
- https://github.com/pallets/werkzeug/security/advisories/GHSA-px8h-6qxv-m22q
- https://github.com/pallets/werkzeug/commit/cf275f42acad1b5950c50ffe8ef58fe62cdce028
- https://github.com/pallets/werkzeug/releases/tag/2.2.3
- https://ubuntu.com/security/notices/USN-5948-1
- https://ubuntu.com/security/notices/USN-5948-2
- NVD
- Launchpad
- Debian