Skip to content
Fencer Vulns
low 2.3

CVE-2024-3220 json

Default mimetype known files writeable on Windows

published 2025-02-14 20 mo ago modified 2026-10-26 14 d ago also BIT-python-2024-3220 , BIT-python-min-2024-3220 , EUVD-2024-31812

cvss
2.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

There is a defect in the CPython standard library module “mimetypes” where on Windows the default list of known file locations are writable meaning other users can create invalid files to cause MemoryError to be raised on Python runtime startup or have file extensions be interpreted as the incorrect file type.

This defect is caused by the default locations of Linux and macOS platforms (such as “/etc/mime.types”) also being used on Windows, where they are user-writable locations (“C:\etc\mime.types”).

To work-around this issue a user can call mimetypes.init() with an empty list (“[]”) on Windows platforms to avoid using the default list of known file locations.

Patch / fix

  • bitnami python 3.14.0
  • bitnami python-min 3.14.0
  • Python Software Foundation CPython 3.11.18, 3.12.16, 3.13.18, 3.14.9, 3.15.1, 3.16.0
  • python3 Alpine 3.23, Alpine 3.22, Alpine 3.21 3.12.16-r0

alpine advisories ALPINE-CVE-2024-3220

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-3220 updated cvss 4.6

python: Default mimetype known files writeable on Windows

  • Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools Red Hat Enterprise Linux 7 python, python3, tkinter, python-libs, python-test, python-tools, +4 more Red Hat Enterprise Linux 8 numpy, scipy, PyYAML, python3, mod_wsgi, python36, +89 more Red Hat Enterprise Linux 9 python3, python3.9, python3.11, python3.12, python3-idle, python3-libs, +11 more Red Hat Enterprise Linux 10 python3.12 Red Hat Enterprise Linux AI (RHEL AI) bootc-nvidia-rhel9, bootc-azure-amd-rhel9, bootc-aws-nvidia-rhel9, bootc-gcp-nvidia-rhel9, bootc-ibm-nvidia-rhel9, bootc-azure-nvidia-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
bitnami python
<3.14.0
3.14.0
bitnami python-min
<3.14.0
3.14.0

Affected products

  • Python Software Foundation CPython

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.