CVE-2020-13849 Denial of service in n/a
Remote attackers can cause denial of service by exploiting MQTT Keep-Alive timeout handling, preventing new connections.
- 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-2020-13849?
CVE-2020-13849 is a high-severity denial of service vulnerability in n/a, published on 4 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.
Weakness: CWE-400
Which versions are affected by CVE-2020-13849?
It affects 1 product.
Products include Mqtt Mqtt.
How do I fix CVE-2020-13849?
No fix has been published for CVE-2020-13849 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-2020-13849 being exploited?
There is no known exploitation of CVE-2020-13849 in the wild and no public exploit code.
Sources
Also known as GHSA-cx2v-x9qw-9rgc.