Security Bulletin: IBM MQ and IBM MQ Appliance command server is vulnerable to a denial of service attack caused by specially crafted PCF messages (CVE-2019-4378)

Created by Robert Parker on Thu, 06/06/2019 - 05:49
Published URL:
https://www.ibm.com/support/pages/node/886885
886885

Security Bulletin


Summary

An error was found within the IBM MQ and IBM MQ Appliance Command Server PCF logic that means an attacker can cause a denial of service attack by sending a specially crafted PCF message. Doing so will cause the Command Server to crash, which will prevent further administrative commands from being executed against queue managers.

Vulnerability Details

CVEID: CVE-2019-4378
DESCRIPTION: IBM MQ command server is vulnerable to a denial of service attack caused by an authenticated and authorized user using specially crafted PCF messages.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/162084 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 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 and IBM MQ Appliance V8
versions 8.0.0.0 - 8.0.0.12
IBM MQ V9.0LTS
versions 9.0.0.0 - 9.0.0.6
IBM MQ and IBM MQ Appliance V9.1 LTS
versions 9.1.0.0 - 9.1.0.2
 
IBM MQ and IBM MQ Appliance V9.1 CD
versions 9.1.0 - 9.1.2

Remediation/Fixes

IBM WebSphere MQ V7.1
Contact IBM Support requesting a fix for APAR IT29141
 
IBM WepSphere MQ V7.5
Contact IBM Support requesting a fix for APAR IT29141
IBM MQ and IBM MQ Appliance V8
IBM MQ V9.0LTS
IBM MQ and IBM MQ Appliance V9.1 LTS
 
IBM MQ and IBM MQ Appliance V9.1 CD
Upgrade to IBM MQ 9.1.3

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

11 September 2019: Original version published

*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: 16459
MQ Product record: 137522
MQ Appliance product record : 137523

Document Location

Worldwide

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Document Information

Modified date:
17 September 2019

UID

ibm10886885

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