Products.CMFCore unauthenticated denial of service and crash via unchecked use of input with Python's marshal module
Impact
The 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.
Patches
The code has been fixed in Products.CMFCore version 3.2.
Workarounds
Users 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.
References
- Products.CMFCore security advisory GHSA-4hpj-8rhv-9x87
Credits
Thanks go to Nicolas VERDIER from onepoint.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the Products.CMFCore issue tracker
- Email us at security@plone.org
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | products-cmfcore | >= 3.0, < 3.2, < 2.7.1 | 3.2, 2.7.1 |
References
- https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87
- https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5
- https://nvd.nist.gov/vuln/detail/CVE-2023-36814
- https://github.com/zopefoundation/Products.CMFCore/commit/c1847a9042abe7965271fa73762dfe091b576de
- https://github.com/pypa/advisory-database/tree/main/vulns/products-cmfcore/PYSEC-2023-113.yaml
- https://github.com/zopefoundation/Products.CMFCore
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-770- Platform
- Python (PyPI)
- Package
products-cmfcore- Disclosed
- 03.07.2023
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2023-113 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-4hpj-8rhv-9x87 - CC BY 4.0
Vulnerability history: products-cmfcore
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2021 07.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 0
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Products.CMFCore unauthenticated denial of service and crash via unchecked use of input with Python's marshal module this entry
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