Security Bulletin: Multiple vulnerabilities in Apache Log4j affect IBM Tivoli Netcool Impact (CVE-2021-45105, CVE-2021-45046)

Summary

The Apache Log4j library used by IBM Tivoli Netcool Impact is vulnerable to denial of service and arbitrary code execution due to Apache Log4j (CVE-2021-45105, CVE-2021-45046). The library is used by IBM Tivoli Netcool Impact to provide logging functionality. The fix includes Apache Log4j 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)

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.

Note: This fix supersedes the previous fix provided for resolution of CVE-2021-44228 and CVE-2021-45046.

**For 7.1.0.23: **Upgrade to the refreshed Fix Pack 24
--OR–
Apply Interim Fix 10 (7.1.0-TIV-NCI-IF0010)

For 7.1.0.24:
Apply Interim Fix 10 (7.1.0-TIV-NCI-IF0010)

Workarounds and Mitigations

None