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HIGH

Deserialization of untrusted data in JMSSink in Apache Log4j 1.x

Published Jan 18, 2022

Description

JMSSink in all versions of Log4j 1.x is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration or if the configuration references an LDAP service the attacker has access to. The attacker can provide a TopicConnectionFactoryBindingName configuration causing JMSSink to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-4104. Note this issue only affects Log4j 1.x when specifically configured to use JMSSink, which is not the default. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.

Affected products

Remediation

Vendor solution

Users should upgrade to Log4j 2 or remove usage of the JMSSink from their configurations.

Red Hat statement

Note this flaw ONLY affects applications which are specifically configured to use JMSSink, which is not the default, or when the attacker has write access to the Log4j configuration for adding JMSSink to the attacker's JNDI LDAP endpoint. Red Hat Satellite bundles log4j-over-slf4j with Candlepin, however, product is not affected as it uses logback framework for logging. Red Hat Virtualization and OpenShift Container Platform in the OCP Metering stack (the Hive/Presto/Hadoop components) ship a vulnerable version of the log4j package, however JMSSink is not used. Therefore the impact of this vulnerability for these products is rated Low.

Red Hat mitigation

These are the possible mitigations for this flaw for releases version 1.x: - Comment out or remove JMSSink in the Log4j configuration if it is used - Remove the JMSSink class from the server's jar files. For example: ``` zip -q -d log4j-*.jar org/apache/log4j/net/JMSSink.class ``` - Restrict access for the OS user on the platform running the application to prevent modifying the Log4j configuration by the attacker.

Metrics

Weaknesses (1)

CWE-502

Deserialization of Untrusted Data

References (14)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Jan 18, 2022
Updated May 27, 2026
Reserved Jan 16, 2022
Link CVE-2022-23302
CISA Vulnrichment
Updated May 22, 2026
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2022-23302
Red Hat
Severity Moderate
Public date Jan 18, 2022
Links CVE-2022-23302 - Bugzilla
GHSA-W9P3-5CR8-M3JJ