Critical

Fiona affected by CVE-2023-45853 related to MiniZip madler-zlib

  • Disclosed: 16.07.2024
  • Updated: 11.10.2026 12:18

Summary

Vulnerability scan of fiona shows CVE-2023-45853. The vulnerability is in GDAL, a dependency of fiona.

Details

Fiona depends on GDAL and GDAL has a port of minizip. MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. The GDAL project has addressed the CVE in version 3.8.0. See https://lists.osgeo.org/pipermail/gdal-dev/2023-November/057881.html.

The Fiona version 1.9.6 wheels on PyPI include GDAL version 3.6.4 and thus could be vulnerable. All of the Fiona 1.10 pre-release wheels in PyPI include GDAL version 3.8.4 and are not vulnerable.

Impact

Systems which use GDAL versions prior to 3.8.0 to open unchecked zip files, whether in combination with fiona or not, could be susceptible to buffer overflows.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) fiona < 1.10b1 1.10b1

References

CVSS score 9.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-1395, CWE-190
Platform
Python (PyPI)
Package
fiona
Disclosed
16.07.2024
Updated
11.10.2026 12:18

Sources and licenses

OSV / GitHub Advisory Database - GHSA-q5fm-55c2-v6j9 - CC BY 4.0

Vulnerability history: fiona

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
07.2024 07.2024
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 1

Disclosures per year

  1. 2024: 2
  2. 2025: 0
  3. 2026: 0
  1. Fiona affected by CVE-2023-45853 related to MiniZip madler-zlib this entry
    Critical · 9.8 ghsa-q5fm-55c2-v6j9 < 1.10b1 1.10b1
  2. High · 7.1 ghsa-g4m4-9q4c-mfw6 < 1.10b2 1.10b2

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