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.

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)

EPSS: 0.020 (78.7th percentile) — read the EPSS interpretation.

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.

Affected products

Mqtt — versions 3.1.1
N/a — versions n/a

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

References

cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)

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.