Security Bulletin: Log4j as used in IBM® QRadar User Behavior Analytics add on to IBM® QRadar SIEM is vulnerable to denial of service. (CVE-2021-45105)

Summary

Log4j is used by IBM® QRadar User Behavior Analytics add on to IBM® QRadar SIEM to log system events. This bulletin provides a remediation to address the Log4j vulnerability CVE-2021-45105 by upgrading IBM® QRadar User Behavior Analytics add on to IBM® QRadar SIEM

Vulnerability Details

CVEID:CVE-2021-45105
**DESCRIPTION:**Apache Log4j is vulnerable to a denial of service, caused by the failure to protect from uncontrolled recursion from self-referential lookups. A remote attacker with control over Thread Context Map (MDC) input data could craft malicious input data that contains a recursive lookup to cause a StackOverflowError that will terminate the process. Note: The vulnerability is also called LOG4J2-3230.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215647 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading IBM® QRadar User Behavior Analytics add on to IBM® QRadar SIEM to version 4.1.6

Updated in version 4.1.6

Workarounds and Mitigations

None