CVE-2021-39231: Missing authentication/authorization on internal RPC endpoints

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-19 · updated 2026-06-17
Weakness: CWE-862

Description

In Apache Ozone versions prior to 1.2.0, Various internal server-to-server RPC endpoints are available for connections, making it possible for an attacker to download raw data from Datanode and Ozone manager and modify Ratis replication configuration.

Affected products

Apache Software Foundation Apache Ozone: before 1.2.0 — fixed in 1.2.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Ozone 1.2.0. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2021/11/19/2
https://mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/%3C110cd117-75ed-364b-cd38-3effd20f2183%40apache.org%3E
http://www.openwall.com/lists/oss-security/2021/11/19/2
https://mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/%3C110cd117-75ed-364b-cd38-3effd20f2183%40apache.org%3E

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