CVE-2020-4465

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-28 · updated 2026-06-17
Weakness: CWE-120

Description

IBM MQ, IBM MQ Appliance, and IBM MQ for HPE NonStop 8.0, 9.1 CD, and 9.1 LTS is vulnerable to a buffer overflow vulnerability due to an error within the channel processing code. A remote attacker could overflow the buffer using an older client and cause a denial of service. IBM X-Force ID: 181562.

Affected products

IBM MQ Appliance: from 8.0 before 8.0.0.15; from 9.1.0.0 before 9.1.0.6; from 9.1.0.0 before 9.2.0.0 — fixed in 8.0.0.15, 9.1.0.6, 9.2.0.0

How to fix

Upgrade to a fixed version: IBM MQ Appliance 8.0.0.15, 9.1.0.6, 9.2.0.0. Check the vendor advisory for mitigations.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/181562
https://www.ibm.com/support/pages/node/6252783
https://exchange.xforce.ibmcloud.com/vulnerabilities/181562
https://www.ibm.com/support/pages/node/6252783

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