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Security Bulletin: IBM MQ is vulnerable to a deadlock in the IBM MQ PAM feature. (CVE-2018-1419)

Security Bulletin


Users of the IBM MQ PAM module feature can experience a deadlock causing further authentication attempts to fail resulting in a denial of service.

Vulnerability Details

CVEID: CVE-2018-1419
IBM MQ, when configured to use a PAM module for authentication, could allow a user to cause a deadlock in the IBM MQ PAM code which could result in a denial of service.
CVSS Base Score: 3.7
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM MQ v8.0

  • Maintenance level: -

  • Maintenance levels: -

IBM MQ v9.0.x CD
  • IBM MQ version 9.0.1 - 9.0.4

Workarounds and Mitigations

IBM MQ v8.0

  • Apply fixpack
    IBM MQ v9.0 LTS
    IBM MQ v9.0.x CD
  • Get Notified about Future Security Bulletins


    Complete CVSS v3 Guide
    On-line Calculator v3

    Related information

    IBM Secure Engineering Web Portal
    IBM Product Security Incident Response Blog

    Change History

    18 May 2018: 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.


    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.

    Cross reference information
    Segment Product Component Platform Version Edition
    Business Integration IBM MQ
    Business Integration IBM MQ Advanced
    Business Integration IBM MQ Advanced for Developers

    Document information

    More support for: IBM MQ

    Software version: 8.0,,,,,,,,, 9.0,,, 9.0.1, 9.0.2, 9.0.3, 9.0.4

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

    Software edition: All Editions

    Reference #: 2014650

    Modified date: 12 June 2018