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Improper Input Validation in GeoServer

High severity GitHub Reviewed Published Apr 13, 2022 in geoserver/geoserver • Updated Jun 27, 2023

Package

maven org.geoserver:gs-main (Maven)

Affected versions

>= 2.20.0, < 2.20.4
< 2.19.6

Patched versions

2.20.4
2.19.6

Description

Impact

The GeoServer security mechanism can perform an unchecked JNDI lookup, which in turn can be used to perform class deserialization and result in arbitrary code execution. The same can happen while configuring data stores with data sources located in JNDI, or while setting up the disk quota mechanism.
In order to perform any of the above changes, the attack needs to have obtained admin rights and use either the GeoServer GUI, or its REST API.

Patches

The lookups are going to be restricted in GeoServer 2.21.0, 2.20.4, 2.19.6.

Workarounds

Protection can be achieved by making the GUI (geoserver/web), the REST configuration (geoserver/rest) and the embedded GeoWebCache configuration (geoserver/gwc/rest) unreachable from remote hosts, in addition to protecting access to the file system where the GeoServer configuration is stored.

References

@jodygarnett jodygarnett published to geoserver/geoserver Apr 13, 2022
Published by the National Vulnerability Database Apr 13, 2022
Published to the GitHub Advisory Database Apr 22, 2022
Reviewed Apr 22, 2022
Last updated Jun 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.098%
(42nd percentile)

Weaknesses

CVE ID

CVE-2022-24847

GHSA ID

GHSA-4pm3-f52j-8ggh

Source code

Credits

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