Security Bulletin: Vulnerability in Apache Log4j affects IBM Cloud Private (CVE-2021-45105)

Summary

There is a vulnerability in the Apache Log4j open source library. The library is used by Elasticsearch, a dependency of IBM Cloud Private, for logging messages to files. This bulletin identifies the security fixes to apply to address the Log4Shell vulnerability (CVE-2021-45105).

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

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading.

The recommended solution involves the IBM Cloud Private ibm-icplogging component. It is recommended that you follow the instructions for the component in the links listed below:

For IBM Cloud Private 3.1.0: IBM Cloud Private 3.1.0 Patch

For IBM Cloud Private 3.1.1: IBM Cloud Private 3.1.1 Patch

For IBM Cloud Private 3.1.2: IBM Cloud Private 3.1.2 Patch

For IBM Cloud Private 3.2.0: IBM Cloud Private 3.2.0 Patch

For IBM Cloud Private 3.2.1: IBM Cloud Private 3.2.1 Patch

For IBM Cloud Private 3.2.2: IBM Cloud Private 3.2.2 Patch

For IBM Cloud Private 3.1.0:

• Upgrade to the latest Continuous Delivery (CD) update package, IBM Cloud Private 3.2.2.

Workarounds and Mitigations

None