An XML external entity (XXE) injection in PyWPS before 4.4.5 allows an attacker to view files on the application server filesystem by assigning a path to the entity. OWSLib 0.24.1 may also be affected.
Weakness
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Owslib | Osgeo | 0.24.1 (including) | 0.24.1 (including) |
| Pywps | Osgeo | * | 4.4.5 (excluding) |
| Pywps | Ubuntu | bionic | * |
| Pywps | Ubuntu | focal | * |
| Pywps | Ubuntu | hirsute | * |
| Pywps | Ubuntu | impish | * |
| Pywps | Ubuntu | kinetic | * |
| Pywps | Ubuntu | trusty | * |
| Pywps | Ubuntu | upstream | * |
| Pywps | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/geopython/OWSLib/issues/790
- https://github.com/geopython/pywps/pull/616
- https://lists.debian.org/debian-lts-announce/2021/09/msg00001.html
- https://github.com/geopython/OWSLib/issues/790
- https://github.com/geopython/pywps/pull/616
- https://lists.debian.org/debian-lts-announce/2021/09/msg00001.html