Deserialization of Untrusted Data The advisory has been revoked - it doesn't affect any version of package apache-log4j1.2 (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2504-APACHELOG4J12-9824216
- published26 Apr 2025
- disclosed14 Dec 2021
Introduced: 14 Dec 2021
CVE-2021-4104 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream apache-log4j1.2 package and not the apache-log4j1.2 package as distributed by Ubuntu.
JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide TopicBindingName and TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2 when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-4104
- http://www.openwall.com/lists/oss-security/2022/01/18/3
- https://access.redhat.com/security/cve/CVE-2021-4104
- https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0033
- https://security.gentoo.org/glsa/202209-02
- https://security.gentoo.org/glsa/202310-16
- https://security.gentoo.org/glsa/202312-02
- https://security.gentoo.org/glsa/202312-04
- https://security.netapp.com/advisory/ntap-20211223-0007/
- https://www.cve.org/CVERecord?id=CVE-2021-44228
- https://www.kb.cert.org/vuls/id/930724
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://github.com/cckuailong/log4shell_1.x