Security Bulletin: IBM Observability by Instana and IBM Observability with Instana - Server and Agents are vulnerable to denial of service and arbitrary code execution due to Apache Log4j (CVE-2021-45105, CVE-2021-45046)

Summary

Vulnerabilities detected in Apache Log4j affects IBM Observability by Instana and IBM Observability with Instana. The CVE numbers are: CVE-2021-45105 and CVE-2021-45046. These vulnerabilities have been addressed in both the Server and Agent components. The fix includes Apache Log4j v2.17.

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)

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

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now.

Upgrade to version 1.0.215.1 by downloading new 1.0.215.1 images published on January 19, 2022 from your IBM Passport Advantage account and following the installation instructions in the Readme.txt file included in the downloaded image.

Workarounds and Mitigations

IBM strongly recommends addressing the vulnerability now by taking the Remediation/Fixes actions documented in this bulletin.