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AUSCERT External Security Bulletin Redistribution
ESB-2021.3959
Security Bulletin: IBM MQ is vulnerable to a denial of service attack
caused by an issue processing message properties. (CVE-2021-29843)
22 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM MQ
Publisher: IBM
Operating System: Linux variants
AIX
HP-UX
Windows
Solaris
IBM i
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-29843
Reference: ESB-2021.3955
ESB-2021.3710
Original Bulletin:
https://www.ibm.com/support/pages/node/6517044
- --------------------------BEGIN INCLUDED TEXT--------------------
IBM MQ is vulnerable to a denial of service attack caused by an issue
processing message properties. (CVE-2021-29843)
Document Information
Document number : 6517044
Modified date : 18 November 2021
Product : IBM MQ
Component : Server
Software version : 8.0.0, 9.0.0, 9.1.0, 9.2.0
Operating system(s): Linux
Linux on IBM Z Systems
AIX
HP-UX
Windows
Solaris
IBM i
Edition : All
Summary
An issue was identified in IBM MQ that could be used by an attacker to create a
denial of service attack. This issue is only present when MQ is configured in
FASTPATH bindings mode.
Vulnerability Details
CVEID: CVE-2021-29843
DESCRIPTION: IBM MQ 9.1 LTS, 9.1 CD, 9.2 LTS, and 9.2CD is vulnerable to a
denial of service attack caused by an issue processing message properties. IBM
X-Force ID: 205203.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
205203 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
+--------------------+----------+
|Affected Product(s) |Version(s)|
+--------------------+----------+
|IBM MQ |8.0 |
+--------------------+----------+
|IBM MQ |9.0 LTS |
+--------------------+----------+
|IBM MQ |9.1 LTS |
+--------------------+----------+
|IBM MQ |9.2 LTS |
+--------------------+----------+
|IBM MQ |9.2 CD |
+--------------------+----------+
Remediation/Fixes
This issue was fixed under APAR IT35489
IBM MQ v8
Apply v8.0.0.16 cumulative security update (CSU) 01 or later CSU
IBM MQ v9.0 LTS
Apply FixPack 9.0.0.12
IBM MQ v9.1 LTS
Apply FixPack 9.1.0.9
IBM MQ v9.2 LTS
Apply FixPack 9.2.0.3
IBM MQ v9.2 CD
Upgrade to IBM MQ 9.2.4
Workarounds and Mitigations
Disable FASTPATH mode.
Change History
18 Nov 2021: Initial Publication
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