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Improper Input Validation and Uncontrolled Resource Consumption and Deserialization of Untrusted Data in GeoServer

High
jodygarnett published GHSA-4pm3-f52j-8ggh Apr 13, 2022

Package

maven GeoServer (Maven)

Affected versions

< 2.20.4, <2.19.6

Patched versions

2.21.0, 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.

Severity

High
7.2
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE ID

CVE-2022-24847