CVE-2021-39233 – This vulnerability allows any client to make un... (How to Fix)

Q: What is the severity of CVE-2021-39233?

CVE-2021-39233 has a CVSS score of 9.1 (CRITICAL). This vulnerability allows any client to make unauthorized container-related DataNode requests to Apache Ozone, bypassing authentication mechanisms. It affects Apache Ozone installations prior to version 1.2.0, potentially exposing sensitive data and allowing unauthorized operations.

📋 TL;DR

This vulnerability allows any client to make unauthorized container-related DataNode requests to Apache Ozone, bypassing authentication mechanisms. It affects Apache Ozone installations prior to version 1.2.0, potentially exposing sensitive data and allowing unauthorized operations.

💻 Affected Systems

Products:

Apache Ozone

Versions: All versions prior to 1.2.0

Operating Systems: All platforms running Apache Ozone

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all Apache Ozone deployments with DataNode services running.

📦 What is this software?

Ozone by Apache

View all CVEs affecting Ozone →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete compromise of Ozone storage system - attackers could read, modify, or delete container data, potentially leading to data loss, corruption, or exposure of sensitive information.

🟠

Likely Case

Unauthorized access to container metadata and data, allowing attackers to read sensitive information or disrupt storage operations.

🟢

If Mitigated

Limited impact with proper network segmentation and access controls, but still presents authentication bypass risk.

🌐 Internet-Facing: HIGH - If Ozone DataNode endpoints are exposed to the internet, attackers can exploit this without authentication.

🏢 Internal Only: MEDIUM - Internal attackers or compromised internal systems could exploit this vulnerability to access unauthorized data.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploitation requires network access to DataNode endpoints but no authentication.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.2.0

Vendor Advisory: https://mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/%3C394a9a73-44dd-b5db-84d8-607c3226eb00%40apache.org%3E

Restart Required: Yes

Instructions:

1. Upgrade Apache Ozone to version 1.2.0 or later. 2. Restart all Ozone services including DataNodes. 3. Verify authorization is properly enforced.

🔧 Temporary Workarounds

Network Segmentation

linux

Restrict network access to Ozone DataNode endpoints to trusted clients only.

iptables -A INPUT -p tcp --dport <datanode_port> -s <trusted_ip> -j ACCEPT
iptables -A INPUT -p tcp --dport <datanode_port> -j DROP

🧯 If You Can't Patch

Implement strict network access controls to limit DataNode endpoint access
Monitor DataNode logs for unauthorized access attempts

🔍 How to Verify

Check if Vulnerable:

Check Apache Ozone version - if version is below 1.2.0, system is vulnerable.

Check Version:

ozone version

Verify Fix Applied:

After upgrading to 1.2.0+, attempt unauthorized DataNode requests should be rejected with proper authorization errors.

📡 Detection & Monitoring

Log Indicators:

Unauthorized access attempts to DataNode container endpoints
Failed authorization logs for container operations

Network Indicators:

Unusual traffic patterns to DataNode ports from unauthorized sources

SIEM Query:

source="ozone.log" AND "DataNode" AND "container" AND ("unauthorized" OR "access denied")

📊 Metadata

CVE ID: CVE-2021-39233

CVSS v3 Score: 9.1 (CRITICAL)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE: CWE-306

Published: November 19, 2021

Last Updated: November 21, 2024

🔗 References

http://www.openwall.com/lists/oss-security/2021/11/19/4 Third Party Advisory
https://mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/%3C394a9a73-44dd-b5db-84d8-607c3226eb00%40apache.org%3E Mailing List,Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/11/19/4 Third Party Advisory
https://mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/%3C394a9a73-44dd-b5db-84d8-607c3226eb00%40apache.org%3E Mailing List,Vendor Advisory

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