Security Bulletin: Log4j Vulnerability ( CVE-2021-44228 ) in IBM Informix Dynamic Server in Cloud Pak for Data

Summary

This Security Alert addresses CVE-2021-44228, a vulnerability in Apache Log4j. Versions Affected: All Apache Log4j2 <=2.14.1 on IBM Informix Dynamic Server in Cloud Pak for Data. Fix includes Apache Log4j 2.17.1.

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)

Affected Products and Versions

Remediation/Fixes

None

Workarounds and Mitigations

IBM strongly recommends addressing the vulnerability now by executing these manual steps.

1. Upgrade your Informix 4.0.0 deployments to 4.0.1
2. Install the Informix operator version 4.0.1 (included in the CASE ibm-informix-operator-bundle-4.0.3.tgz)
3. Navigate to the official documentation for the Informix CP4D service (<https://www.ibm.com/docs/en/cloud-paks/cp-data/4.0?topic=services-informix&gt;) and follow the steps in the “Upgrading Informix” to update any deployed Informix custom resource from 4.0.0 to 4.0.1