Security Bulletin: IBM MQ is vulnerable to a denial of service attack caused by an error processing messages. (CVE-2021-38875)

Security Bulletin

Summary

An issue was identified with IBM MQ message processing code that could allow an authenticated attacker (with authority to connect to the queue manager and put messages) to execute a denial of service attack against the queue manager with a malformed message.

Vulnerability Details

CVEID: CVE-2021-38875
DESCRIPTION: IBM MQ is vulnerable to a denial of service attack caused by an error processing messages.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/208398 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM MQ	8.0
IBM MQ	9.0 LTS
IBM MQ	9.1 LTS
IBM MQ	9.2 LTS
IBM MQ	9.1 CD
IBM MQ	9.2 CD

Remediation/Fixes

This issue was resolved by APAR IT36179

IBM MQ version 8.0

Apply version 8.0 cumulative security update "CSU01"

IBM MQ version 9.0 LTS

Apply FixPack 9.0.0.12

IBM MQ version 9.1 LTS

Apply FixPack 9.1.0.9

IBM MQ version 9.2 LTS

Apply FixPack 9.2.0.4

IBM MQ version 9.1 CD and 9.2 CD

Upgrade to IBM MQ 9.2.4

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

18 Nov 2021: 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 is vulnerable to a denial of service attack caused by an error processing messages. (CVE-2021-38875)