CVE-2021-39034 Denial of service in MQ
Attackers can cause a denial of service in IBM MQ by exploiting an issue in the channel process, affecting system availability.
- 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-2021-39034?
CVE-2021-39034 is a medium-severity denial of service vulnerability in Ibm Mq, published on 17 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM MQ 9.1 LTS is vulnerable to a denial of service attack caused by an issue within the channel process. IBM X-Force ID: 213964.
Which versions are affected by CVE-2021-39034?
It affects 1 product.
Products include Ibm Mq.
How do I fix CVE-2021-39034?
No fix has been published for CVE-2021-39034 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-2021-39034 being exploited?
There is no known exploitation of CVE-2021-39034 in the wild and no public exploit code.
Other vulnerabilities in Ibm Mq
- CVE-2026-10575 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2026-11375 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2026-11378 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2022-22489 XML external entity in MQ
- CVE-2026-10027 IBM MQ queue manager is vulnerable to unauthenticated remote code execution
Sources
Also known as GHSA-hp4f-cj7x-h6mc.