CVE-2023-0809 Denial of service in Mosquitto
Attackers can cause denial of service in Mosquitto MQTT broker by sending malicious initial packets that trigger excessive memory allocation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-0809?
CVE-2023-0809 is a medium-severity denial of service vulnerability in Eclipse Mosquitto, published on 2 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.
Which versions are affected by CVE-2023-0809?
It affects 1 product.
Products include Eclipse Mosquitto.
How do I fix CVE-2023-0809?
Upgrade to a fixed version.
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-2023-0809 being exploited?
There is no known exploitation of CVE-2023-0809 in the wild and no public exploit code.
Other vulnerabilities in Eclipse Mosquitto
Sources
Also known as ALPINE-CVE-2023-0809, DEBIAN-CVE-2023-0809, GHSA-v9xr-r3xx-x9gc, OESA-2023-1716, OESA-2023-1717, OESA-2023-1718 and 1 more.