CVE-2023-23934

Published on: Not Yet Published

Last Modified on: 02/23/2023 10:31:00 PM UTC

CVE-2023-23934 - advisory for GHSA-px8h-6qxv-m22q

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Certain versions of Werkzeug from Palletsprojects contain the following 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.

CVE-2023-23934 has been assigned by [email protected] to track the vulnerability - currently rated as LOW severity.
Affected Vendor/Software: pallets - werkzeug version = < 2.2.3

CVSS3 Score: 3.5 - LOW

Attack Vector ^ⓘ	Attack Complexity	Privileges Required	User Interaction
ADJACENT_NETWORK	LOW	NONE	REQUIRED
Scope	Confidentiality Impact	Integrity Impact	Availability Impact
UNCHANGED	NONE	LOW	NONE

CVE References

Description	Tags ^ⓘ	Link
Release 2.2.3 · pallets/werkzeug · GitHub	github.com text/html	MISC github.com/pallets/werkzeug/releases/tag/2.2.3
Merge pull request from GHSA-px8h-6qxv-m22q · pallets/[email protected] · GitHub	github.com text/html	MISC github.com/pallets/werkzeug/commit/cf275f42acad1b5950c50ffe8ef58fe62cdce028
cookie prefixed with `=` can shadow unprefixed cookie · Advisory · pallets/werkzeug · GitHub	github.com text/html	MISC github.com/pallets/werkzeug/security/advisories/GHSA-px8h-6qxv-m22q

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Related QID Numbers

181616 Debian Security Update for python-werkzeug (DLA 3346-1)
199235 Ubuntu Security Notification for Werkzeug Vulnerabilities (USN-5948-1)
283790 Fedora Security Update for mingw (FEDORA-2023-af75e27098)
905561 Common Base Linux Mariner (CBL-Mariner) Security Update for python-werkzeug (13589)

Known Affected Configurations (CPE V2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Palletsprojects	Werkzeug	All	All	All	All

cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*:

No vendor comments have been submitted for this CVE

Social Mentions

Source	Title	Posted (UTC)
/r/netcve	CVE-2023-23934	2023-02-14 21:38:31