CVE-2019-4049: Security Bulletin: IBM MQ is vulnerable to a denial of service attack within the error logging function (CVE-2019-4049)

Summary

An error was found in the error logging functionality which could allow an attacker to consume disk space on the underlying filesystem. This could cause a denial of service attack.

Vulnerability Details

CVEID: CVE-2019-4049
DESCRIPTION: IBM WebSphere MQ is vulnerable to a denial of service due to a local user being able to fill up the disk space of the underlying filesystem using the error logging service.
CVSS Base Score: 6.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/156398 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 V9.1 LTS

versions 9.1.0.0 - 9.1.0.2

IBM MQ V9.1 CD

version 9.1.1

Remediation/Fixes

IBM MQ V9.1 LTS

IBM MQ V9.1 CD

Workarounds and Mitigations

None.

References

Off

Acknowledgement

The vulnerability was reported to IBM by Josh McIver

Change History

16th September 2019: Fixed type in 9.1 version numbers
5th August 2019: Corrected fix details for 9.1 LTS
1st August 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

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.

Internal Use Only

Product Record: 129393

Advisory: 14915

Document Location

Worldwide

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"client;server","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"}],"Version":"9.1.0.0;9.1.0.1;9.1.0.2;9.1.1","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]