Vulnerability Description
Pyramid is an open source Python web framework. A path traversal vulnerability in Pyramid versions 2.0.0 and 2.0.1 impacts users of Python 3.11 that are using a Pyramid static view with a full filesystem path and have a `index.html` file that is located exactly one directory above the location of the static view's file system path. No further path traversal exists, and the only file that could be disclosed accidentally is `index.html`. Pyramid version 2.0.2 rejects any path that contains a null-byte out of caution. While valid in directory/file names, we would strongly consider it a mistake to use null-bytes in naming files/directories. Secondly, Python 3.11, and 3.12 has fixed the underlying issue in `os.path.normpath` to no longer truncate on the first `0x00` found, returning the behavior to pre-3.11 Python, un an as of yet unreleased version. Fixes will be available in:Python 3.12.0rc2 and 3.11.5. Some workarounds are available. Use a version of Python 3 that is not affected, downgrade to Python 3.10 series temporarily, or wait until Python 3.11.5 is released and upgrade to the latest version of Python 3.11 series.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Agendaless | Pyramid | >= 2.0, < 2.0.2 |
| Fedoraproject | Fedora | 38 |
Related Weaknesses (CWE)
References
- https://github.com/Pylons/pyramid/commit/347d7750da6f45c7436dd0c31468885cc9343c8Patch
- https://github.com/Pylons/pyramid/security/advisories/GHSA-j8g2-6fc7-q8f8PatchVendor Advisory
- https://github.com/python/cpython/issues/106242Issue TrackingThird Party Advisory
- https://github.com/python/cpython/pull/106816Patch
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://github.com/Pylons/pyramid/commit/347d7750da6f45c7436dd0c31468885cc9343c8Patch
- https://github.com/Pylons/pyramid/security/advisories/GHSA-j8g2-6fc7-q8f8PatchVendor Advisory
- https://github.com/python/cpython/issues/106242Issue TrackingThird Party Advisory
- https://github.com/python/cpython/pull/106816Patch
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
FAQ
What is CVE-2023-40587?
CVE-2023-40587 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Pyramid is an open source Python web framework. A path traversal vulnerability in Pyramid versions 2.0.0 and 2.0.1 impacts users of Python 3.11 that are using a Pyramid static view with a full filesys...
How severe is CVE-2023-40587?
CVE-2023-40587 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-40587?
Check the references section above for vendor advisories and patch information. Affected products include: Agendaless Pyramid, Fedoraproject Fedora.