🛡️ CVE-2021-38153 — apache-nifi

🟡 CVSS 5.0 — Medium ✅ No Known Exploit OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Timing Attack Vulnerability for Apache Kafka Connect and Clients

Some components in Apache Kafka use Arrays.equals to validate a password or key, which is vulnerable to timing attacks that make brute force attacks for such credentials more likely to be successful. Users should upgrade to 2.8.1 or higher, or 3.0.0 or higher where this vulnerability has been fixed. The affected versions include Apache Kafka 2.0.0, 2.0.1, 2.1.0, 2.1.1, 2.2.0, 2.2.1, 2.2.2, 2.3.0, 2.3.1, 2.4.0, 2.4.1, 2.5.0, 2.5.1, 2.6.0, 2.6.1, 2.6.2, 2.7.0, 2.7.1, and 2.8.0.

Affected software

CVE-2021-38153 is recorded against 6 packages.

  • apache-nifi (fixed in 1.26.0-r2)
  • kafka
  • org.apache.kafka:kafka-2.11 (from 2.0.0)
  • org.apache.kafka:kafka-2.12 (from 2.8.0 up to 2.8.1)
  • org.apache.kafka:kafka-2.13 (from 2.8.0 up to 2.8.1)
  • org.apache.kafka:kafka-clients (from 2.8.0 up to 2.8.1)

Timeline and source

Published on 6 June 2024 and last revised on 28 January 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

kafka.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
www.oracle.com (Web)
www.oracle.com (Web)
www.oracle.com (Web)
nvd.nist.gov (Web)

CVE-2021-38153 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-06-06
Updated 2026-08-12
Modified 2026-01-28
Fix URL N/A

Affected Packages

Software From version Fixed in
apache-nifi 1.26.0-r2
kafka
org.apache.kafka:kafka-2.11 2.0.0
org.apache.kafka:kafka-2.12 2.8.0 2.8.1
org.apache.kafka:kafka-2.13 2.8.0 2.8.1
org.apache.kafka:kafka-clients 2.8.0 2.8.1

References

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