Resource exhaustion in Mqtt
CVE-2020-13849
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Mqtt — versions 3.1.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mdpi.com/1424-8220/20/10/2932 (Technical Description, Third Party Advisory)
- doi.org/10.3390/s20102932 (Technical Description, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-13849?
- CVE-2020-13849 is a high-severity vulnerability in Mqtt, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-06-04.
- How severe is CVE-2020-13849?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-13849 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.