CVE-2023-36814: Products.CMFCore Denial of Service Vulnerability
HIGHCVE-2023-36814 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Products.CMFCore libraries in the PyPI ecosystem. The issue involves products.cmfcore unauthenticated denial of service and crash via unchecked use of input with python's marshal module. Remediation is available by upgrading affected packages to version 3.2, 2.7.1.
CVE-2023-36814 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2023-36814
To remediate this vulnerability, upgrade all affected Products.CMFCore dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install Products.CMFCore>=3.2pip install Products.CMFCore>=2.7.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show Products.CMFCoreHow to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2023-36814, inspect your installed packages using pip:
pip show Products.CMFCoreAnalyze the terminal output to locate any version of Products.CMFCore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2), your application is affected.
Note: The pip show Products.CMFCore command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Products.CMFCore, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-36814 Affected Products.CMFCore Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
Products.CMFCore
|
PyPI |
≥ 3.0
< 3.2
|
3.2
|
|
Products.CMFCore
|
PyPI |
< 2.7.1
|
2.7.1
|
References
Frequently Asked Questions
What is CVE-2023-36814?
Which Products.CMFCore versions are affected?
What version fixes CVE-2023-36814?
Is Products.CMFCore affected?
What is the CVSS score of CVE-2023-36814?
What CWE is associated with CVE-2023-36814?
How can I check PyPI dependencies for CVE-2023-36814?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-4hpj-8rhv-9x87",
"modified" : "2024-10-14T15:28:49Z",
"published" : "2023-07-05T22:42:09Z",
"aliases" : [ "CVE-2023-36814" ],
"summary" : "Products.CMFCore unauthenticated denial of service and crash via unchecked use of input with Python's marshal module",
"details" : "### Impact\nThe use of Python's marshal module to handle unchecked input in a public method on `PortalFolder` objects can lead to an unauthenticated denial of service and crash situation. The code in question is exposed by all portal software built on top of `Products.CMFCore`, such as Plone. All deployments are vulnerable.\n\n### Patches\nThe code has been fixed in `Products.CMFCore` version 3.2.\n\n### Workarounds\nUsers can make the affected `decodeFolderFilter` method unreachable by editing the `PortalFolder.py` module in `Products.CMFCore` by hand and then restarting Zope. Go to line 233 of `PortalFolder.py` and remove both the `@security.public` decorator for `decodeFolderFilter` as well as the method's entire docstring. This is safe because the method is not actually used by current code.\n\n### References\n- Products.CMFCore security advisory [GHSA-4hpj-8rhv-9x87](https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87)\n\n### Credits\nThanks go to Nicolas VERDIER from onepoint.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n- Open an issue in the [Products.CMFCore issue tracker](https://github.com/zopefoundation/Products.CMFCore/issues)\n- Email us at [security@plone.org](mailto:security@plone.org)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "Products.CMFCore"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0"
}, {
"fixed" : "3.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "PyPI",
"name" : "Products.CMFCore"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.7.1"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-36814"
}, {
"type" : "WEB",
"url" : "https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5"
}, {
"type" : "WEB",
"url" : "https://github.com/zopefoundation/Products.CMFCore/commit/c1847a9042abe7965271fa73762dfe091b576de"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/products-cmfcore/PYSEC-2023-113.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/zopefoundation/Products.CMFCore"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-770" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-07-05T22:42:09Z",
"nvd_published_at" : "2023-07-03T17:15:09Z"
}
}