Security Bulletin: IBM MQ can cause a Denial of Service attack to connecting MQTT clients (CVE-2018-1684)

Security Bulletin

Summary

A problem within the IBM MQ MQTT Service logic could cause a denial of service attack to be executed against MQTT clients attempting to connect to the queue manager.

Vulnerability Details

CVEID: CVE-2018-1684
DESCRIPTION: IBM WebSphere MQ is vulnerable to a error with MQTT topic string publishing that can cause a denial of service attack.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/145456 for the current score
CVSS Environmental Score*: Undefined
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

IBM MQ V8

IBM MQ V8 versions 8.0.0.0 - 8.0.0.10

IBM MQ V9 LTS

IBM MQ V9 LTS versions 9.0.0.0 - 9.0.0.5

IBM MQ V9 CD

IBM MQ V9 CD versions 9.0.1 - 9.0.5

IBM MQ V9.1 LTS

IBM MQ V9.1 LTS versions 9.1.0.0

Remediation/Fixes

IBM MQ V8

Apply iFix IT25490

IBM MQ V9 LTS

Apply iFix IT25490

IBM MQ V9 CD

Upgrade to IBM MQ V9.1.0 and apply iFix IT25490

IBM MQ V9.1 LTS

Apply iFix IT25490

Workarounds and Mitigations

None.

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

1st November 2018: Initial version created

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Internal Use Only

Advisory ID 12350
Product Record ID 116659

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Tips

Security Bulletin: IBM MQ can cause a Denial of Service attack to connecting MQTT clients (CVE-2018-1684)