GHSA-px8h-6qxv-m22q

Suggest an improvement
Source
https://github.com/advisories/GHSA-px8h-6qxv-m22q
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-px8h-6qxv-m22q/GHSA-px8h-6qxv-m22q.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-px8h-6qxv-m22q
Aliases
Published
2023-02-15T15:37:03Z
Modified
2024-02-17T05:35:00.580106Z
Severity
  • CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Summary
Incorrect parsing of nameless cookies leads to __Host- cookies bypass
Details

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.

References

Affected packages

PyPI / werkzeug

Package

Name
werkzeug
View open source insights on deps.dev
Purl
pkg:pypi/werkzeug

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0The exact introduced commit is unknown
Fixed
2.2.3

Affected versions

0.*

0.1
0.2
0.3
0.3.1
0.4
0.4.1
0.5
0.5.1
0.6
0.6.1
0.6.2
0.7
0.7.1
0.7.2
0.8
0.8.1
0.8.2
0.8.3
0.9
0.9.1
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.10
0.10.1
0.10.2
0.10.3
0.10.4
0.11
0.11.1
0.11.2
0.11.3
0.11.4
0.11.5
0.11.6
0.11.7
0.11.8
0.11.9
0.11.10
0.11.11
0.11.12
0.11.13
0.11.14
0.11.15
0.12
0.12.1
0.12.2
0.13
0.14
0.14.1
0.15.0
0.15.1
0.15.2
0.15.3
0.15.4
0.15.5
0.15.6
0.16.0
0.16.1

1.*

1.0.0rc1
1.0.0
1.0.1

2.*

2.0.0rc1
2.0.0rc2
2.0.0rc3
2.0.0rc4
2.0.0rc5
2.0.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.1.2
2.2.0a1
2.2.0
2.2.1
2.2.2

Ecosystem specific 

{
    "affected_functions": [
        "werkzeug.http.parse_cookie"
    ]
}