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CVE-2021-4104: Deserialization of Untrusted Data

December 14, 2021 (updated October 13, 2023)

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

  • www.openwall.com/lists/oss-security/2022/01/18/3
  • access.redhat.com/security/cve/CVE-2021-4104
  • github.com/advisories/GHSA-fp5r-v3w9-4333
  • github.com/apache/logging-log4j2/pull/608
  • nvd.nist.gov/vuln/detail/CVE-2021-4104
  • psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0033
  • security.gentoo.org/glsa/202209-02
  • security.netapp.com/advisory/ntap-20211223-0007/
  • www.cve.org/CVERecord?id=CVE-2021-44228
  • www.kb.cert.org/vuls/id/930724
  • www.oracle.com/security-alerts/cpuapr2022.html
  • www.oracle.com/security-alerts/cpujan2022.html
  • www.oracle.com/security-alerts/cpujul2022.html

Code Behaviors & Features

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Affected versions

All versions up to 2.0

Solution

Unfortunately, there is no solution available yet.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-502: Deserialization of Untrusted Data
  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Source file

maven/org.zenframework.z8.dependencies.commons/log4j-1.2.17/CVE-2021-4104.yml

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