Security Bulletin: IBM MQ AMQP channels fail to block connections restricted by SSLPEER setting (CVE-2020-4320)

Security Bulletin

Summary

An error was found within the SSLPEER logic within a AMQP channel that meant it would not block/allow certificates as expected.

Vulnerability Details

CVEID: CVE-2020-4320
DESCRIPTION: IBM MQ Appliance, IBM MQ, AMQP Channels do not correctly block or allow clients based on the certificate distinguished name SSLPEER setting.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/177403 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM MQ	9.1 LTS
IBM MQ	9.0 LTS
IBM MQ	8.0
IBM MQ	9.1 CD

Remediation/Fixes

IBM MQ and IBM MQ Appliance V8
Apply FixPack 8.0.0.15

IBM MQ V9 LTS
Apply FixPack 9.0.0.10

IBM MQ and IBM MQ Appliance V9.1 LTS
Apply FixPack 9.1.0.5

IBM MQ and IBM MQ Appliance V9.1 CD
Apply FixPack 9.1.5

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

11 Mar 2020: Initial Publication

*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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

Security Bulletin: IBM MQ AMQP channels fail to block connections restricted by SSLPEER setting (CVE-2020-4320)