GeoServer has a Server-Side Request Forgery (SSRF) Vulnerability in its XML Entity Resolution
Description
Summary
A GeoServer that uses ENTITY_RESOLUTION_ALLOWLIST may allow attacker to perform unauthenticated Server-Side Request Forgery (SSRF).
Details
This vulnerability requires that GeoServer is set up to use a proxy base URL and the ENTITY_RESOLUTION_ALLOWLIST (default since 2.25.0):
Impact
This vulnerability allows an attacker to cause GeoServer to make requests to an unintended location.
Workaround
GeoServer installations are only affected by this vulnerability if they use a proxy base URL that does not contain a URL path or end with a slash (e.g., https://somesite.org instead of https://somesite.org/ or https://somesite.org/geoserver). If the proxy base URL does not contain a path, adding a slash to the end of the URL will mitigate this vulnerability.
### Resources https://osgeo-org.atlassian.net/browse/GEOS-11867 https://github.com/geoserver/geoserver/pull/8622
### Credits: - Le Mau Anh Phong at Verichains Cyber Force
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.geoserver.web:gs-web-appMaven | < 2.26.4 | 2.26.4 |
org.geoserver:gs-mainMaven | < 2.26.4 | 2.26.4 |
org.geoserver:gs-mainMaven | >= 2.27.0, < 2.27.3 | 2.27.3 |
org.geoserver.web:gs-web-appMaven | >= 2.27.0, < 2.27.3 | 2.27.3 |
Affected products
1Patches
Vulnerability mechanics
References
3News mentions
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