---
title: "GHSA-q5fm-55c2-v6j9: Fiona affected by CVE-2023-45853 related to MiniZip madler-zlib"
url: https://erroneo.us/security/ghsa/GHSA-q5fm-55c2-v6j9/
description: "GHSA-q5fm-55c2-v6j9 (critical, PyPI): Fiona affected by CVE-2023-45853 related to MiniZip madler-zlib. Summary Vulnerability scan of fiona shows…"
type: advisory
section: "Security Digest"
date_published: 2024-07-16
date_modified: 2024-08-21
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-q5fm-55c2-v6j9"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-q5fm-55c2-v6j9: Fiona affected by CVE-2023-45853 related to MiniZip madler-zlib

## Affected packages

- PyPI `fiona` < 1.10b1 → fixed: 1.10b1

## Details

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 zipOpenNewFileInZip464 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.

## Sources

- [GitHub Advisory GHSA-q5fm-55c2-v6j9](https://github.com/advisories/GHSA-q5fm-55c2-v6j9)
- [github.com](https://github.com/Toblerity/Fiona/security/advisories/GHSA-q5fm-55c2-v6j9)
- [nvd.nist.gov](https://nvd.nist.gov/vuln/detail/CVE-2023-45853)
- [github.com](https://github.com/OSGeo/gdal/commit/4aa7ca61c1d2191baf1eea2a97d0dec33a41691f)
- [github.com](https://github.com/madler/zlib/commit/73331a6a0481067628f065ffe87bb1d8f787d10c)

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Source page: https://erroneo.us/security/ghsa/GHSA-q5fm-55c2-v6j9/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt