CVE-2023-27476: XML External Entity (XXE) Injection in OWSLib
First published: Tue Mar 07 2023(Updated: )
OWSLib is a Python package for client programming with Open Geospatial Consortium (OGC) web service interface standards, and their related content models. OWSLib's XML parser (which supports both `lxml` and `xml.etree`) does not disable entity resolution, and could lead to arbitrary file reads from an attacker-controlled XML payload. This affects all XML parsing in the codebase. This issue has been addressed in version 0.28.1. All users are advised to upgrade. The only known workaround is to patch the library manually. See `GHSA-8h9c-r582-mggc` for details.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Osgeo Owslib | <0.28.1 | |
| debian/owslib | <=0.17.1-1 | 0.17.1-1+deb10u1 0.23.0-1+deb11u1 0.27.2-3 0.29.2-1 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2023-27476
- https://github.com/geopython/OWSLib/commit/d91267303a695d69e73fa71efa100a035852a063
- https://www.cve.org/CVERecord?id=CVE-2023-27476
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034182
- https://github.com/geopython/OWSLib/pull/863/commits/b92687702be9576c0681bb11cad21eb631b9122f
- https://github.com/geopython/OWSLib/security/advisories/GHSA-8h9c-r582-mggc
- https://lists.debian.org/debian-lts-announce/2023/06/msg00032.html
- https://securitylab.github.com/advisories/GHSL-2022-131_owslib/
- https://www.debian.org/security/2023/dsa-5426
- https://github.com/geopython/OWSLib/commit/b0c687544ddc213d8dcd4a056139b63451938b21
- https://securitylab.github.com/advisories/GHSL-2022-131_OWSLib/
Frequently Asked Questions
What is CVE-2023-27476?
CVE-2023-27476 is a vulnerability in the OWSLib Python package that allows arbitrary file reads from the file system.
How does CVE-2023-27476 occur?
CVE-2023-27476 occurs because OWSLib's XML parser does not disable entity resolution.
What is the severity of CVE-2023-27476?
CVE-2023-27476 has a severity rating of 7.5 (high).
Which versions of OWSLib are affected by CVE-2023-27476?
OWSLib versions up to and including 0.28.1 are affected by CVE-2023-27476.
How can I fix CVE-2023-27476?
To fix CVE-2023-27476, update OWSLib to version 0.29.2-1 or higher.
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