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Security Bulletin: IBM MQ is vulnerable to a denial of service attack within the error logging function (CVE-2019-4039)

Security Bulletin


Summary

A vulnerability was found within the error logging function that meant that a local attacker could cause an overwrite of arbitrary MQ files and cause a denial of service attack against IBM MQ queue managers.

Vulnerability Details

CVEID: CVE-2019-4039
DESCRIPTION: IBM MQ could allow a local attacker to cause a denial of service within the error log reporting system.
CVSS Base Score: 6.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/156163 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

IBM MQ V8
versions 8.0.0.0 - 8.0.0.11

IBM MQ V9 LTS
versions 9.0.0.0 - 9.0.0.6

IBM MQ V9.1 LTS
versions 9.1.0.0 - 9.1.0.1

IBM MQ V9.1 CD
versions 9.1.1


Remediation/Fixes


Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM by Josh McIver

Change History

16 May 2019: Original version published
12 June 2019: Updated to confirm affected levels of IBM MQ version 9.0 and provide link to mitigation for this release

*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

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document information

More support for: IBM MQ

Component: error logging

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, 9.1.1

Operating system(s): AIX, HP-UX, Linux, Solaris

Reference #: 0870492

Modified date: 31 July 2019