CVE-2023-30861 (GCVE-0-2023-30861)
Vulnerability from cvelistv5
Published
2023-05-02 17:04
Modified
2025-02-13 16:49
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-539 - Use of Persistent Cookies Containing Sensitive Information
Summary
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.
References
security-advisories@github.com https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b Patch
security-advisories@github.com https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965 Patch
security-advisories@github.com https://github.com/pallets/flask/releases/tag/2.2.5 Release Notes
security-advisories@github.com https://github.com/pallets/flask/releases/tag/2.3.2 Release Notes
security-advisories@github.com https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq Vendor Advisory
security-advisories@github.com https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html
security-advisories@github.com https://security.netapp.com/advisory/ntap-20230818-0006/
security-advisories@github.com https://www.debian.org/security/2023/dsa-5442
af854a3a-2127-422b-91ae-364da2661108 https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b Patch
af854a3a-2127-422b-91ae-364da2661108 https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965 Patch
af854a3a-2127-422b-91ae-364da2661108 https://github.com/pallets/flask/releases/tag/2.2.5 Release Notes
af854a3a-2127-422b-91ae-364da2661108 https://github.com/pallets/flask/releases/tag/2.3.2 Release Notes
af854a3a-2127-422b-91ae-364da2661108 https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20230818-0006/
af854a3a-2127-422b-91ae-364da2661108 https://www.debian.org/security/2023/dsa-5442
Impacted products
Vendor Product Version
pallets flask Version: >= 2.3.0, < 2.3.2
Version: < 2.2.5
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The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached.\\n\\nThis 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-539\", \"description\": \"CWE-539: Use of Persistent Cookies Containing Sensitive Information\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2023-08-20T20:06:11.279Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-30861\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-13T16:49:37.977Z\", \"dateReserved\": \"2023-04-18T16:13:15.882Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2023-05-02T17:04:22.197Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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