🛡️ CVE-2021-38153 — apache-nifi
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
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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More CVE 2021 advisories
Browse all of CVE 2021 in the advisory index.
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