CVE-2023-27476 XML External Entity (XXE) Injection in OWSLib
An attacker can read arbitrary files via XML External Entity injection in OWSLib's XML parser, affecting users of this Python library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-27476?
CVE-2023-27476 is a high-severity vulnerability in geopython OWSLib, published on 7 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-611
Which versions are affected by CVE-2023-27476?
3 open source packages ship an affected version, including owslib and OWSLib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
owslib PyPI | All versions | 0.28.1 |
owslib PyPI | All versions | 0.28.1 |
OWSLib PyPI | All versions | 0.28.1 |
Products include Osgeo Owslib.
How do I fix CVE-2023-27476?
Upgrade owslib to 0.28.1 or later.
Is CVE-2023-27476 being exploited?
There is no known exploitation of CVE-2023-27476 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2023-27476, DLA-3470-1, DSA-5426-1, GHSA-8h9c-r582-mggc, MGASA-2023-0112, PYSEC-2023-86 and 1 more.