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AUSCERT External Security Bulletin Redistribution
IBM MQ RDQM and IBM MQ Appliance are vulnerable to a denial
of service attack (CVE-2018-1084)
14 May 2019
AusCERT Security Bulletin Summary
Product: IBM MQ
Operating System: Linux variants
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-1084
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IBM MQ RDQM and IBM MQ Appliance are vulnerable to a denial of service attack
Product: IBM MQ
Software version: 18.104.22.168, 22.214.171.124, 126.96.36.199, 9.1.1, 9.1.2
Operating system(s): Linux
Software edition: Advanced
Reference #: 0879045
A denial of service vulnerability was discovered within the corosync library
which is used by the RDQM feature of IBM MQ and the high availability feature
of IBM MQ Appliance.
DESCRIPTION: Corosync is vulnerable to a denial of service, caused by an
integer overflow in exec/totemcrypto.c. By sending a specially-crafted packet,
a remote attacker could exploit this vulnerability to cause the application to
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
141586 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
IBM MQ and IBM MQ Appliance version 9.1 LTS
versions 188.8.131.52 - 184.108.40.206
IBM MQ and IBM MQ Appliance version 9.1 CD
versions 9.1.1 - 9.1.2
IBM MQversion 9.1 LTS
Apply ifix IT28745
IBM MQ version 9.1 CD
Apply ifix IT28745
IBM MQ Appliance version 9.1 LTS
Apply ifix IT28745 , or later maintenance.
IBM MQ Appliance version 9.1 CD
Apply ifix IT28745, or later maintenance
Workarounds and Mitigations
IBM MQ RDQM is only affected when configured in a high availability (HA) group.
In most cases the IBM MQ Appliance is not affected by this issue. The exception
is when you have a high availability configuration in which the two appliances
not directly connected (that is, they are remotely situated and connected by
a switch or similar).
10 May 2019: Original version published
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