Security Bulletin: A vulnerability in Apache log4j (CVE-2021-45105) affects IBM Operations Analytics Predictive Insights

Summary

There is a vulnerability in the Apache Log4j open source library used by IBM Operations Analytics Predictive Insights. Apache Log4j versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups which allows a Denial of Service attack. This affects the IBM Operations Analytics Predictive Insights Analytics, UI and REST Mediation components. This vulnerability has been addressed and the fix upgrades to Apache Log4j v. 2.17.1

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

If not already applied, IBM strongly recommends addressing the vulnerability:

1. apply 1.3.6 Interim Fix 5
https://www.ibm.com/support/fixcentral/swg/selectFixes?product=ibm/Tivoli/IBM+SmartCloud+Analytics±+Predictive+Insights&release=All

2. THEN apply predictiveInsights1.3.6_iFix5_log4j_patch2

Instructions on how to apply both, iFix5 and patch2 are found in the README in the downloaded software.

Workarounds and Mitigations

None