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Security Bulletin: IBM MQ RDQM and IBM MQ Appliance are vulnerable to a denial of service attack (CVE-2018-1084)

Description

## Summary 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. ## Vulnerability Details **CVEID:** [CVE-2018-1084](<https://vulners.com/cve/CVE-2018-1084>) **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 crash. 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 9.1.0.0 - 9.1.0.2 _**IBM MQ and IBM MQ Appliance version 9.1 CD**_ versions 9.1.1 - 9.1.2 ## Remediation/Fixes _**IBM MQ version 9.1 LTS**_ Apply ifix [IT28745](<http://www.ibm.com/support/fixcentral/swg/quickorder?parent=ibm%7EWebSphere&product=ibm/WebSphere/WebSphere+MQ&release=9.1.0.2&platform=Linux+64-bit,x86_64&function=all&source=fc>) _**IBM MQ version 9.1 CD**_ Apply ifix [IT28745](<http://www.ibm.com/support/fixcentral/swg/quickorder?parent=ibm%7EWebSphere&product=ibm/WebSphere/WebSphere+MQ&release=9.1.2&platform=Linux+64-bit,x86_64&function=aparId&apars=IT28745&source=fc>) _**IBM MQ Appliance version 9.1 LTS**_ Apply ifix [IT28745](<https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&product=ibm/WebSphere/IBM+MQ+Appliance+M2000&function=fixId&fixids=9.1.0.2-IBM-MQ-Appliance-IT28745>), or later maintenance. _**IBM MQ Appliance version 9.1 CD**_ Apply ifix [IT28745,](<https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&product=ibm/WebSphere/IBM+MQ+Appliance+M2000&function=fixId&fixids=9.1.2-IBM-MQ-Appliance-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 are not directly connected (that is, they are remotely situated and connected by means of a switch or similar). ##


Affected Software


CPE Name Name Version
ibm mq 9.1.0.0
ibm mq 9.1.0.1
ibm mq 9.1.0.2
ibm mq 9.1.1
ibm mq 9.1.2
ibm mq appliance 9.1.0.0
ibm mq appliance 9.1.0.1
ibm mq appliance 9.1.0.2
ibm mq appliance 9.1.1
ibm mq appliance 9.1.2

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