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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3898
          Security Bulletin: IBM MQ is vulnerable to an issue in
                      Eclipse Jetty (CVE-2021-28165)
                             16 November 2021

===========================================================================

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

Product:           IBM MQ
Publisher:         IBM
Operating System:  Windows
                   Linux variants
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-28165  

Reference:         ASB-2021.0214
                   ASB-2021.0212
                   ESB-2021.3447
                   ESB-2021.3256
                   ESB-2021.2896

Original Bulletin: 
   https://www.ibm.com/support/pages/node/6516422

- --------------------------BEGIN INCLUDED TEXT--------------------

IBM MQ is vulnerable to an issue in Eclipse Jetty (CVE-2021-28165)

Document Information

Document number    : 6516422
Modified date      : 15 November 2021
Product            : IBM MQ
Component          : Explorer, Salesforce Bridge, Blockchain Bridge
Software version   : 9.0.0, 9.1.0, 9.2.0
Operating system(s): Linux
                     Windows
Edition            : All

Summary

An issue was identified in Eclipse Jetty that affects IBM MQ. Eclipse Jetty is
used within the MQ Explorer, MQ Salesforce Bridge and MQ Blockchain Bridge
components.

Vulnerability Details

CVEID: CVE-2021-28165
DESCRIPTION: Eclipse Jetty is vulnerable to a denial of service, caused by
improper input valistion. By sending a specially-crafted TLS frame, a remote
attacker could exploit this vulnerability to cause CPU resources to reach to
100% usage.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
199305 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

+--------------------+----------+
|Affected Product(s) |Version(s)|
+--------------------+----------+
|IBM MQ              |9.2 LTS   |
+--------------------+----------+
|IBM MQ              |9.2 CD    |
+--------------------+----------+
|IBM MQ              |9.1 LTS   |
+--------------------+----------+
|IBM MQ              |9.1 CD    |
+--------------------+----------+
|IBM MQ              |9.0 LTS   |
+--------------------+----------+

Remediation/Fixes

This issue was resolved under APAR IT37719

IBM MQ version 9.2 LTS

Apply FixPack 9.2.0.3

IBM MQ version 9.1 CD and 9.2 CD

Upgrade to IBM MQ 9.2.3

IBM MQ version 9.1 LTS

Apply FixPack 9.1.0.9

IBM MQ version 9.0 LTS

Apply FixPack 9.0.0.12

Workarounds and Mitigations

None

Change History

05 Nov 2021: Initial Publication

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