CVE-2025-27819

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

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Kafka
Published at:
Updated at:

References

Link Tags
https://kafka.apache.org/cve-list vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-27819?
CVE-2025-27819 has been scored as a high severity vulnerability.
How to fix CVE-2025-27819?
To fix CVE-2025-27819, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27819 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-27819 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27819?
CVE-2025-27819 affects Apache Software Foundation Apache Kafka.
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