CVE-2023-40587

MEDIUM EPSS 45.7%
Published Aug 25, 20232y ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Aug 25, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
45.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 3

VendorProductVersionRange
agendalesspyramid*≥2.0  –  <2.0.2
fedoraprojectfedora38any
fedoraprojectfedora39any

References 6

  • github.com https://github.com/Pylons/pyramid/commit/347d7750da6f45c7436dd0c31468885cc9343c85
    Patch
  • github.com https://github.com/Pylons/pyramid/security/advisories/GHSA-j8g2-6fc7-q8f8
    PatchVendor Advisory
  • github.com https://github.com/python/cpython/issues/106242
    Issue TrackingThird Party Advisory
  • github.com https://github.com/python/cpython/pull/106816
    Patch
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYSDTQ7NP5GHPQ7HBE47MBJQK7YEIYMF/
    Mailing List
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQIPHQTM3XE5NIEXCTQFV2J2RK2YUSMT/
    Mailing List

Remediation

  • github.com https://github.com/Pylons/pyramid/commit/347d7750da6f45c7436dd0c31468885cc9343c85
    Patch
  • github.com https://github.com/Pylons/pyramid/security/advisories/GHSA-j8g2-6fc7-q8f8
    PatchVendor Advisory
  • github.com https://github.com/python/cpython/pull/106816
    Patch