low2.6
CVE-2023-23934
Incorrect parsing of nameless cookies leads to __Host- cookies bypass
Impact
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 <= 2.2.2 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | Werkzeug | < 2.2.3 | 2.2.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Palletsprojects | Werkzeug | before 2.2.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/pallets/werkzeug/commit/cf275f42acad1b5950c50ffe8ef58fe62cdce028
- https://github.com/pallets/werkzeug/releases/tag/2.2.3
- https://github.com/pallets/werkzeug/security/advisories/GHSA-px8h-6qxv-m22q
- https://security.netapp.com/advisory/ntap-20230818-0003/
- https://www.debian.org/security/2023/dsa-5470
- https://github.com/advisories/GHSA-px8h-6qxv-m22q
- https://nvd.nist.gov/vuln/detail/CVE-2023-23934
- https://github.com/pypa/advisory-database/tree/main/vulns/werkzeug/PYSEC-2023-57.yaml
- https://security.netapp.com/advisory/ntap-20230818-0003