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Security Bulletin: MAS Monitor 8.4, 8.5, and 8.6 log4j

Security Bulletin


Summary

A new vulnerability with log4j has been detected. MAS Monitor uses log4j in all releases and interim fixes are now available for our 8.4, 8.5 and 8.6 releases. More details of the vulnerability are available here: https://nvd.nist.gov/vuln/detail/CVE-2021-44228

Vulnerability Details

CVEID:   CVE-2021-4104
DESCRIPTION:   Apache Log4j could allow a remote attacker to execute arbitrary code on the system, caused by the deserialization of untrusted data when the attacker has write access to the Log4j configuration. If the deployed application is configured to use JMSAppender, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 8.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215048 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2021-45046
DESCRIPTION:   Apache Log4j could result in remote code execution, caused by an incomplete fix of CVE-2021-44228 in certain non-default configurations. When the logging configuration uses a non-default Pattern Layout with a Context Lookup, an attacker with control over Thread Context Map (MDC) input data can craft malicious input data using a JNDI Lookup pattern to leak sensitive information and remote code execution in some environments and local code execution in all environments.
CVSS Base score: 9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215195 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
Monitor ComponentAll

Remediation/Fixes

To receive the interim fix update your Red Hat OpenShift deployments for each of the Monitor API pods to point to the newly published fix image in IBM Cloud Registry.
 
Steps:
First, disable the Monitor operator by decrementing the number of pods instantiated by the operator deployment from 1 to 0. 

 

Now go each of these 5 deployments:  rest-meta, rest-kpi, rest-master, rest-datalake and rest-dscmanager.

Change the image tag from the released version to this image version

For 8.6:
8.6.2-pre.8.6.hotfix

For 8.5:
8.5.7-pre.8.5.hotfix

For 8.4:
8.4.12-pre.8.4.hotfix
 
After the pods restart the interim fix has been applied

Move to this directory on each pod. 
cd /opt/was/liberty/wlp/usr/servers/default/dropins
List the files in the war.  
unzip -l *.war
 Verify your log4j.jar is version 2.15.0.

Reenable your operator to automatically install/receive future fixpacks as they are released on OLM.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

16 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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Document Information

Modified date:
28 March 2022

Initial Publish date:
16 December 2021

UID

ibm16566913

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