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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== 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 =========================================================================== 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. 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