Improper Input Validation and Injection in Apache Log4j2
Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to an attack where an attacker with permission to modify the logging configuration file can construct a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI which can execute remote code. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.
Affected packages
Only the org.apache.logging.log4j:log4j-core package is directly affected by this vulnerability. The org.apache.logging.log4j:log4j-api should be kept at the same version as the org.apache.logging.log4j:log4j-core package to ensure compatability if in use.
This issue does not impact default configurations of Log4j2 and requires an attacker to have control over the Log4j2 configuration, which reduces the likelihood of being exploited.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.logging.log4j:log4j-core | >= 2.0-beta7, < 2.3.2, >= 2.4, < 2.12.4, >= 2.13.0, < 2.17.1 | 2.3.2, 2.12.4, 2.17.1 |
| Java / Kotlin (Maven) | org.ops4j.pax.logging:pax-logging-log4j2 | >= 1.8.0, < 1.9.2, >= 1.10.0, < 1.10.9, >= 1.11.0, < 1.11.13, >= 2.0.0, < 2.0.14 | 1.9.2, 1.10.9, 1.11.13, 2.0.14 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-44832
- https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf
- https://github.com/apache/logging-log4j2
- https://issues.apache.org/jira/browse/LOG4J2-3293
- https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143
- https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
- https://security.netapp.com/advisory/ntap-20220104-0001
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- http://www.openwall.com/lists/oss-security/2021/12/28/1
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-20, CWE-74- Platform
- Java / Kotlin (Maven)
- Package
org.apache.logging.log4j:log4j-core, org.ops4j.pax.logging:pax-logging-log4j2- Disclosed
- 04.01.2022
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-8489-44mv-ggj8 - CC BY 4.0
Vulnerability history: org.apache.logging.log4j:log4j-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 01.2020 04.2026
- Without a fix
- 0
- Exploited in attacks
- 2
Severity breakdown
- Critical 3
- High 2
- Medium 5
- Low 1
Disclosures per year
- 2020: 2
- 2021: 3
- 2022: 1
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 3
-
Improper Input Validation and Injection in Apache Log4j2 this entry
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