CVE-2021-33176 Denial of service in vernemq
Attackers can cause denial of service in VerneMQ MQTT Broker by sending untrusted inputs that trigger excessive memory consumption.
- 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-2021-33176?
CVE-2021-33176 is a high-severity denial of service vulnerability in vernemq, published on 8 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
VerneMQ MQTT Broker versions prior to 1.12.0 are vulnerable to a denial of service attack as a result of excessive memory consumption due to the handling of untrusted inputs. These inputs cause the message broker to consume large amounts of memory, resulting in the application being terminated by the operating system.
Which versions are affected by CVE-2021-33176?
It affects 1 product.
Products include Octavolabs Vernemq.
How do I fix CVE-2021-33176?
No fix has been published for CVE-2021-33176 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-2021-33176 being exploited?
There is no known exploitation of CVE-2021-33176 in the wild and no public exploit code.
Other vulnerabilities in vernemq
Sources
Also known as GHSA-h44q-8m75-8x46.