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)

Security Bulletin

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

Affected Product(s)	Version(s)
QRadar User Behavior Analytics	1.0.0 - 4.1.5

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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

07 Jan 2022: Initial Publication

*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.

Disclaimer

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

Document Location

Worldwide

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Tips

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)