GHSA-m2qf-hxjv-5gpq
Suggest an improvement- Source
- https://github.com/advisories/GHSA-m2qf-hxjv-5gpq
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/05/GHSA-m2qf-hxjv-5gpq/GHSA-m2qf-hxjv-5gpq.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-m2qf-hxjv-5gpq
- Aliases
- Published
- 2023-05-01T19:22:20Z
- Modified
- 2024-09-20T18:19:08.835166Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header
- Details
-
When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by a proxy to other clients. If the proxy also caches
Set-Cookieheaders, it may send one client'ssessioncookie to other clients. The severity depends on the application's use of the session, and the proxy's behavior regarding cookies. The risk depends on all these conditions being met.- The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.
- The application sets
session.permanent = True. - The application does not access or modify the session at any point during a request.
SESSION_REFRESH_EACH_REQUESTis enabled (the default).- The application does not set a
Cache-Controlheader to indicate that a page is private or should not be cached.
This happens because vulnerable versions of Flask only set the
Vary: Cookieheader when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. - References
-
- https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq
- https://nvd.nist.gov/vuln/detail/CVE-2023-30861
- https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b
- https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965
- https://github.com/pallets/flask
- https://github.com/pallets/flask/releases/tag/2.2.5
- https://github.com/pallets/flask/releases/tag/2.3.2
- https://github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2023-62.yaml
- https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html
- https://security.netapp.com/advisory/ntap-20230818-0006
- https://www.debian.org/security/2023/dsa-5442
Affected packages
PyPI / flask
Package
- Name
- flask
- View open source insights on deps.dev
- Purl
- pkg:pypi/flask
PyPI / flask
Package
- Name
- flask
- View open source insights on deps.dev
- Purl
- pkg:pypi/flask
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.2.5
Affected versions
0.*
0.1
0.2
0.3
0.3.1
0.4
0.5
0.5.1
0.5.2
0.6
0.6.1
0.7
0.7.1
0.7.2
0.8
0.8.1
0.9
0.10
0.10.1
0.11
0.11.1
0.12
0.12.1
0.12.2
0.12.3
0.12.4
0.12.5
1.*
1.0
1.0.1
1.0.2
1.0.3
1.0.4
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
2.*
2.0.0rc1
2.0.0rc2
2.0.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.1.2
2.1.3
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4