Security Bulletin: IBM MQ Appliance is vulnerable to a denial of service (CVE-2023-4807)

Summary

IBM MQ Appliance has resolved a denial of service vulnerability.

Vulnerability Details

CVEID:CVE-2023-4807
**DESCRIPTION:**OpenSSL is vulnerable to a denial of service, caused by a state corruption flaw in the POLY1305 MAC (message authentication code) implementation, when running on newer X86_64 processors supporting the AVX512-IFMA instructions. A local authenticated attacker could exploit this vulnerability to cause an incorrect result of some application dependent calculations or a crash or in some cases gain complete control of the application process.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/265578 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Remediation/Fixes

This vulnerability is addressed under APAR IT44589

IBM strongly recommends addressing the vulnerability now.

IBM MQ Appliance version 9.2 LTS

Upgrade to IBM MQ Appliance 9.3.0.15 fix pack, or later firmware.

IBM MQ Appliance version 9.3 LTS

Apply IBM MQ Appliance 9.3.0.15 fix pack, or later firmware.

IBM MQ Appliance version 9.3 CD

Apply IBM MQ Appliance 9.3.4.1 cumulative security update, or later firmware.

Workarounds and Mitigations

None