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Security Bulletin: Log4j as used in IBM® QRadar User Behavior Analytics application add on to IBM® QRadar SIEM is vulnerable to remote code execution (RCE) (CVE-2021-44228)

Security Bulletin


Log4j is used by IBM® QRadar User Behavior Analytics application to log system events. This bulletin provides a remediation for the vulnerability, CVE-2021-44228 by upgrading IBM® QRadar User Behavior Analytics application add on to IBM® QRadar SIEM and thus addressing the exposure to the log4j vulnerability.

Vulnerability Details

CVEID:   CVE-2021-44228
DESCRIPTION:   Apache Log4j could allow a remote attacker to execute arbitrary code on the system, caused by the failure to protect against attacker controlled LDAP and other JNDI related endpoints by JNDI features. By sending a specially crafted code string, an attacker could exploit this vulnerability to load arbitrary Java code on the server and take complete control of the system. Note: The vulnerability is also called Log4Shell or LogJam.
CVSS Base score: 10
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s) Version(s)
QRadar User Behavior Analytics All


Updated in version 4.1.4

The recommendation is to apply the fix as soon as possible.

Note: An issue was found impacting some upgrades from earlier versions of UBA to versions 4.1.3 and 4.1.4. UBA version 4.1.5 has been released to address the upgrade issue and address CVE-2021-44228. More information can be found in the following technote:

Workarounds and Mitigations


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Change History

14 Dec 2021: Initial Publication
17 Dec 2021: Added comments about upgrade issues
17 Dec 2021: Further comments about upgrade issues

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


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Document Information

Modified date:
17 December 2021