CVE-2021-4104
Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2
- State
- Published
- Severity
- 7.5 High
- Published
- Dec 14, 2021
- Updated
- May 28, 2026
- Reserved
- Dec 13, 2021
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
Apache Log4j 1.xApache Software Foundation |
|
References
- https://www.cve.org/CVERecord?id=CVE-2021-44228
- https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
- https://access.redhat.com/security/cve/CVE-2021-4104
- VU#930724third-party-advisory
- [oss-security] 20220118 CVE-2022-23302: Deserialization of untrusted data in JMSSink in Apache Log4j 1.xmailing-list
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0033
- https://security.netapp.com/advisory/ntap-20211223-0007/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- GLSA-202209-02vendor-advisory
- GLSA-202310-16vendor-advisory
- GLSA-202312-02vendor-advisory
- GLSA-202312-04vendor-advisory
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