ESB-2019.0778 - [Win] IBM MQ: Increased privileges - Existing account 2019-03-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0778
   IBM Security Bulletin: IBM MQ is vulnerable to a privilege escalation
          attack when using multiplexed channels (CVE-2018-1974)
                               12 March 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM MQ
Publisher:         IBM
Operating System:  Windows
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1974  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10792043

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IBM MQ is vulnerable to a privilege escalation attack when using multiplexed
channels (CVE-2018-1974)

Product:             IBM MQ

Component:           server

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, 9.0.0.0,
                     9.0.0.1, 9.0.0.2, 9.0.0.3, 9.0.0.4, 9.0.0.5, 9.1.0.0,
                     9.1.0.1, 9.1.1

Operating system(s): Windows

Software edition:    all

Reference #:         0792043

Security Bulletin

Summary

IBM MQ could allow an authenticated attacker to escalate their privileges with
channels that have multiplexing enabled.

Vulnerability Details

CVEID: CVE-2018-1974
DESCRIPTION: IBM MQ could allow an authenticated attacker to escalate their
privileges when using multiplexed channels.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
153915 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM MQ v8

  o Maintenance levels 8.0.0.0 - 8.0.0.10

IBM MQ v9 LTS

  o Maintenance levels 9.0.0.0 - 9.0.0.5

IBM MQ v9.1 CD

  o Maintenance levels 9.1.0 - 9.1.1

IBM MQ v9.1 LTS

  o Maintenance levels 9.1.0.0 - 9.1.0.1

Remediation/Fixes

IBM MQ v8

  o Apply FixPack 8.0.0.11

IBM MQ v9 LTS

  o Apply iFix IT24586 for MQ 9.0.0.5

IBM MQ v9.1 CD

  o Apply iFix IT24586 for MQ 9.1.1

IBM MQ v9.1 LTS

  o Apply iFix IT24586 for MQ 9.1.0.1

Workarounds and Mitigations

Disable multiplexing on channels

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

1 March 2019: Initial version released

*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.

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