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HistoryJan 07, 2022 - 6:00 p.m.

Security Bulletin: IBM MQ Blockchain bridge dependencies are vulnerable to issues in Apache Log4j (CVE-2021-45105 & CVE-2021-44832)

2022-01-0718:00:41
www.ibm.com
29

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.975 High

EPSS

Percentile

99.9%

Summary

A Denial of Service issue was identified within the Log4j fix for CVE-2021-45046 that is used by Fabric Gateway to provide logging functionality. Fabric Gateway is used by the IBM MQ blockchain bridge component of IBM MQ to provide connection capability between IBM MQ queue managers and Hyperledger Fabric. The IBM MQ Blockchain Bridge is shipped as part of IBM MQ on Linux x86-64 only, under the MQSeriesBCBridge RPM package. Based on current knowledge and analysis, no other IBM MQ components or installable packages are affected. This bulletin provides patch information to address the reported Log4j vulnerabilities

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-2021-44832
**DESCRIPTION:**Apache Log4j could allow a remote attacker with permission to modify the logging configuration file to execute arbitrary code on the system. By constructing a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI , an attacker could exploit this vulnerability to execute remote code.
CVSS Base score: 6.6
CVSS Temporal Score: See: <https://exchange.xforce.ibmcloud.com/vulnerabilities/216189&gt; for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s) Version(s)
IBM MQ 9.2 CD
IBM MQ 9.1 CD
IBM MQ 9.2 LTS

Remediation/Fixes

This issue is resolved by APAR IT39467

The following patches resolve CVE-2021-45046, CVE-2021-44228, CVE-2021-45105 & CVE-2021-44832

IBM MQ version 9.2 LTS

Apply iFix 9.2.0.4-IBM-MQ-LinuxX64-LAIT39386-IT39444-IT39467

IBM MQ version 9.1 CD and 9.2 CD

Apply iFix 9.2.4-IBM-MQ-LinuxX64-LAIT39386-IT39444-IT39467

Workarounds and Mitigations

The IBM MQ Blockchain Bridge is shipped as part of IBM MQ on Linux x86-64 only, under the MQSeriesBCBridge RPM package. Based on current knowledge and analysis, no other IBM MQ components or installable packages are affected.

CPENameOperatorVersion
ibm mqeq9.1.0
ibm mqeq9.2.0

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.975 High

EPSS

Percentile

99.9%

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