Security Bulletin: IBM MQ could allow an attacker to cause a denial of service caused by an error within the pubsub logic. (CVE-2020-4376)

Security Bulletin

Summary

An error within the pubsub logic could allow an attacker to execute a denial of service attack.

Vulnerability Details

CVEID: CVE-2020-4376
DESCRIPTION: IBM MQ, IBM MQ Appliance, IBM MQ for HPE NonStop 8.0.4 and 8.1.0 could allow an attacker to cause a denial of service caused by an error within the pubsub logic. IBM X-Force ID: 179081.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/179081 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
IBM WebSphere MQ	7.5
IBM WebSphere MQ	7.1

Remediation/Fixes

IBM WebSphere MQ 7.1

Contact IBM Support and request a fix for APAR IT31349

IBM WebSphere MQ 7.5

Contact IBM Support and request a fix for APAR IT31349

IBM MQ 8.0

Apply Fixpack 8.0.0.15

IBM MQ 9.0. LTS

Apply Fixpack 9.0.0.10

IBM MQ 9.1 LTS

Apply Fixpack 9.1.0.5

IBM MQ 9.1 CD

Upgrade to IBM MQ 9.2

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

03 Aug 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 could allow an attacker to cause a denial of service caused by an error within the pubsub logic. (CVE-2020-4376)