Security Bulletin: Vulnerability in Apache Log4j (CVE-2021-45105) affects IBM Workload Scheduler 9.5

Security Bulletin

Summary

Apache Log4j 2.16, that is affected by CVE-2021-45105, is installed with IBM Workload Scheduler 9.5.0.5 in jdbc driver for informix/Onedb rdbms.

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)
IBM Workload Scheduler	9.5.0.5

Remediation/Fixes

Apar IJ36872 has been opened to address the issue and will be fixed in 9.5.0.6.

The affected file log4j-core-2.16.0.jar is not used by Informix/Onedb jdbc driver we stronly suggest to delete the file manually.

The location of the file to delete is <IWS home>/jdbcdrivers/informix on Master, Backup and Dynamic Domain Manager, <DWC home>/jdbcdrivers/informix on Dynamic Workload Console.

Note that the file log4j-core-2.16.0.jar is not present in releases of fixpacks different from 9.5.0.5.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

22 Dec 2021: 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: Vulnerability in Apache Log4j (CVE-2021-45105) affects IBM Workload Scheduler 9.5