Security Bulletin: IBM MQ could allow an authenticated user, under nondefault configuration, to cause a data corruption attack due to an error when using segmented messages. (CVE-2020-4592)

Security Bulletin

Summary

An issue was found within the MQ queue manager message processing logic that could allow an attacker to cause corrupt data when using segmented messages with a queue manager that is configured to use Linear Logging.

Vulnerability Details

CVEID: CVE-2020-4592
DESCRIPTION: IBM MQ could allow an authenticated user, under nondefault configuration to cause a data corruption attack due to an error when using segmented messages.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/184755 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N)

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

Remediation/Fixes

IBM WebSphere MQ 7.5

Contact IBM Support and request a fix for APAR IT31663

IBM MQ 8.0

Apply interim fix for APAR IT31663

IBM MQ 9.0 LTS

Apply Fixpack 9.0.0.11

IBM MQ 9.1 LTS

Apply Fixpack 9.1.0.6

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

18 Dec 2020: Initial Publication
23 Dec 2020: Added details about linear logging

*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 authenticated user, under nondefault configuration, to cause a data corruption attack due to an error when using segmented messages. (CVE-2020-4592)