OESA-2023-1922

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1922
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2023-1922.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2023-1922
Upstream
Published
2023-12-15T11:06:29Z
Modified
2025-08-12T05:19:57.226314Z
Summary
python-flask security update
Details

Flask is a lightweight WSGI web application framework. It is designed to make getting started quick and easy, with the ability to scale up to complex applications. It began as a simple wrapper around Werkzeug and Jinja and has become one of the most popular Python web application frameworks.

Security Fix(es):

Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches Set-Cookie headers, it may send one client's session cookie 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.

  1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.
  2. The application sets session.permanent = True
  3. The application does not access or modify the session at any point during a request.
  4. SESSION_REFRESH_EACH_REQUEST enabled (the default).
  5. The application does not set a Cache-Control header to indicate that a page is private or should not be cached.

This happens because vulnerable versions of Flask only set the Vary: Cookie header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5.(CVE-2023-30861)

Database specific 
{
    "severity": "High"
}
References

Affected packages

openEuler:20.03-LTS-SP1 / python-flask

Package

Name
python-flask
Purl
pkg:rpm/openEuler/python-flask&distro=openEuler-20.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.2-5.oe1

Ecosystem specific 

{
    "src": [
        "python-flask-1.1.2-5.oe1.src.rpm"
    ],
    "noarch": [
        "python2-flask-1.1.2-5.oe1.noarch.rpm",
        "python3-flask-1.1.2-5.oe1.noarch.rpm"
    ]
}

openEuler:20.03-LTS-SP3 / python-flask

Package

Name
python-flask
Purl
pkg:rpm/openEuler/python-flask&distro=openEuler-20.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.2-5.oe1

Ecosystem specific 

{
    "src": [
        "python-flask-1.1.2-5.oe1.src.rpm"
    ],
    "noarch": [
        "python2-flask-1.1.2-5.oe1.noarch.rpm",
        "python3-flask-1.1.2-5.oe1.noarch.rpm"
    ]
}

openEuler:22.03-LTS / python-flask

Package

Name
python-flask
Purl
pkg:rpm/openEuler/python-flask&distro=openEuler-22.03-LTS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.1.2-4.oe2203sp2

Ecosystem specific 

{
    "src": [
        "python-flask-1.1.2-4.oe2203.src.rpm",
        "python-flask-2.1.2-4.oe2203sp1.src.rpm",
        "python-flask-2.1.2-4.oe2203sp2.src.rpm"
    ],
    "noarch": [
        "python3-flask-1.1.2-4.oe2203.noarch.rpm",
        "python3-flask-2.1.2-4.oe2203sp1.noarch.rpm",
        "python3-flask-2.1.2-4.oe2203sp2.noarch.rpm"
    ]
}

openEuler:22.03-LTS-SP1 / python-flask

Package

Name
python-flask
Purl
pkg:rpm/openEuler/python-flask&distro=openEuler-22.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.1.2-4.oe2203sp1

Ecosystem specific 

{
    "src": [
        "python-flask-2.1.2-4.oe2203sp1.src.rpm"
    ],
    "noarch": [
        "python3-flask-2.1.2-4.oe2203sp1.noarch.rpm"
    ]
}

openEuler:22.03-LTS-SP2 / python-flask

Package

Name
python-flask
Purl
pkg:rpm/openEuler/python-flask&distro=openEuler-22.03-LTS-SP2

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.1.2-4.oe2203sp2

Ecosystem specific 

{
    "src": [
        "python-flask-2.1.2-4.oe2203sp2.src.rpm"
    ],
    "noarch": [
        "python3-flask-2.1.2-4.oe2203sp2.noarch.rpm"
    ]
}