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AUSCERT External Security Bulletin Redistribution
ESB-2019.2915
IBM MQ clients are vulnerable to a denial of service attack caused by
consuming specifically crafted messages (CVE-2019-4261)
5 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM MQ
Publisher: IBM
Operating System: Linux variants
Windows
AIX
HP-UX
Solaris
IBM i
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4261
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10886887
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IBM MQ clients are vulnerable to a denial of service attack caused by consuming
specifically crafted messages (CVE-2019-4261)
Product: IBM MQ
Component: client
Software version: 8.0.0.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5,
8.0.0.6, 8.0.0.7, 8.0.0.8, 8.0.0.9, 8.0.0.10, 8.0.0.11,
9.0.0.0, 9.0.0.1, 9.0.0.2, 9.0.0.3, 9.0.0.4, 9.0.0.5,
9.0.0.6, 9.1.0.0, 9.1.0.1, 9.1.0.2, 9.1.1, 9.1.2
Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows
Software edition: All
Reference #: 0886887
Security Bulletin
Summary
An error was found with the IBM MQ client message handling logic that causes a
denial of service attack when specifically crafted messages are consumed.
Vulnerability Details
CVEID: CVE-2019-4261
DESCRIPTION: IBM MQ Clients are vulnerable to a denial of service attack caused
by specially crafted messages.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
160013 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
Affected Products and Versions
IBM WebSphere MQ V7.1
versions 7.1.0.0 - 7.1.0.9
IBM WepSphere MQ V7.5
versions 7.5.0.0 - 7.5.0.9
IBM MQ V8
versions 8.0.0.0 - 8.0.0.11
IBM MQ V9.0LTS
versions 9.0.0.0 - 9.0.0.6
IBM MQ V9.1 LTS
versions 9.1.0.0 - 9.1.0.2
IBM MQ V9.1 CD
versions 9.1.0 - 9.1.2
Remediation/Fixes
IBM WebSphere MQ V7.1
Contact IBM Support to request a fix for APAR IT25916
IBM WepSphere MQ V7.5
Contact IBM Support to request a fix for APAR IT25916
IBM MQ V8
Apply Fixpack 8.0.0.12
IBM MQ V9.0LTS
Apply Fixpack 9.0.0.7
IBM MQ V9.1 LTS
Apply Fixpack 9.1.0.3
IBM MQ V9.1 CD
Upgrade to IBM MQ 9.1.3
Workarounds and Mitigations
None
Change History
1st August 2019: Original version published
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