VulnerabilityAnalyzed

CVE-2024-34711

GeoServer is an open source server that allows users to share and edit geospatial data.

HIGH 8.2EPSS 0.30%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

GeoServer is an open source server that allows users to share and edit geospatial data. An improper URI validation vulnerability exists that enables an unauthorized attacker to perform XML External Entities (XEE) attack, then send GET request to any HTTP server. By default, GeoServer use PreventLocalEntityResolver class from GeoTools to filter out malicious URIs in XML entities before resolving them. The URI must match the regex (?i)(jar:file|http|vfs)[^?#;]*\\.xsd. But the regex leaves a chance for attackers to request to any HTTP server or limited file. Attacker can abuse this to scan internal networks and gain information about them then exploit further. GeoServer 2.25.0 and greater default to the use of ENTITY_RESOLUTION_ALLOWLIST and does not require you to provide a system property.

CVSS 3.1: 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS: 0.30% probability · 22th percentile
CISA KEV: Not listed
Weakness: CWE-200, CWE-611, CWE-918
Affected: osgeo/geoserver
Source: security-advisories@github.com

References

https://docs.geoserver.org/latest/en/user/production/config.html#production-config-external-entitiesProduct
https://github.com/geoserver/geoserver/security/advisories/GHSA-mc43-4fqr-c965Mitigation, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.