CVE-2021-29843 Denial of service in MQ Appliance

Medium 5.3 Published 8 Nov 2021 Updated 17 Sep 2024

Attackers can cause a denial of service in IBM MQ by exploiting an issue in message property processing.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-29843?

CVE-2021-29843 is a medium-severity denial of service vulnerability in IBM MQ Appliance, published on 8 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM MQ 9.1 LTS, 9.1 CD, 9.2 LTS, and 9.2CD is vulnerable to a denial of service attack caused by an issue processing message properties. IBM X-Force ID: 205203.

Which versions are affected by CVE-2021-29843?

It affects 1 product.

Products include Ibm Mq Appliance.

How do I fix CVE-2021-29843?

No fix has been published for CVE-2021-29843 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-29843 being exploited?

There is no known exploitation of CVE-2021-29843 in the wild and no public exploit code.

Sources

Also known as GHSA-w36r-438f-hgrv.