CVE-2019-4055 Denial of service in MQ
Attackers can cause a denial of service in IBM MQ by exploiting a flaw in the TLS key renegotiation function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-4055?
CVE-2019-4055 is a high-severity denial of service vulnerability in Ibm Mq, published on 19 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM MQ 8.0.0.0 through 8.0.0.10, 9.0.0.0 through 9.0.0.5, and 9.1.0.0 through 9.1.1 is vulnerable to a denial of service attack within the TLS key renegotiation function. IBM X-Force ID: 156564.
Which versions are affected by CVE-2019-4055?
It affects 2 products.
Products include Ibm Mq, Ibm Mq Appliance.
How do I fix CVE-2019-4055?
No fix has been published for CVE-2019-4055 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-2019-4055 being exploited?
There is no known exploitation of CVE-2019-4055 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-q2xx-h2wh-wv97.