CVE-2021-39234
Raw block data can be read bypassing ACL/authorization
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
CVE-2021-39234- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 4.9 Medium
AV:N/AC:M/Au:S/C:P/I:P/A:N - Weakness
- CWE-20, CWE-863
- Updated
- 2026-11-02
CVE List No score
Raw block data can be read bypassing ACL/authorization
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
CVE-2021-39234- Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2021-2334 No score
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
EUVD-2021-2334- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c8cw-2c5j-xff3
Incorrect Authorization in Apache Ozone
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
GHSA-c8cw-2c5j-xff3- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
CVE-2021-39234- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-c8cw-2c5j-xff3
Incorrect Authorization in Apache Ozone
In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft specific request allowing access those blocks, bypassing other security checks like ACL.
- Record
GHSA-c8cw-2c5j-xff3- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.ozone:ozone-mainMaven |
before 1.2.0 | 1.2.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39234 is a medium vulnerability (CVSS 6.8) in Apache Ozone, published November 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.41%, the 72nd percentile. Fixed in org.apache.ozone:ozone-main 1.2.0.