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CVE-2025-27819

Apache Kafka: Possible RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration

Published: Jun 10, 2025Updated: Jul 11, 2025 Sources: CVE List NVD GHSA BDUCWE-502
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.9%
Top 45.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

In CVE-2023-25194, we announced the RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration in Kafka Connect API. But not only Kafka Connect API is vulnerable to this attack, the Apache Kafka brokers also have this vulnerability. To exploit this vulnerability, the attacker needs to be able to connect to the Kafka cluster and have the AlterConfigs permission on the cluster resource. Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usage in SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka 3.4.0, and "com.sun.security.auth.module.JndiLoginModule,com.sun.security.auth.module.LdapLoginModule" is disabled by default in in Apache Kafka 3.9.1/4.0.0

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

Apache KafkaApache Software Foundation
On-premDatabase
Databases / cache-message-queue
kafkaapache
On-premDatabase
Databases / cache-message-queue
org.apache.kafka:kafka_2.10MavenOSS Libraries
org.apache.kafka:kafka_2.11MavenOSS Libraries
org.apache.kafka:kafka_2.12MavenOSS Libraries
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
mavenpackage-ecosystemOSS Libraries
and 7 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://kafka.apache.org/cve-list
kafka.apache.org
https://nvd.nist.gov/vuln/detail/CVE-2025-27819
nvd.nist.gov
https://github.com/advisories/GHSA-26f8-x7cc-wqpc
github.com
and 3 more references View all →

Timeline

Published
Jun 10, 2025
Last Updated
Jul 11, 2025

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