CVE-2021-34431

Description

In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.37%
Vendor Advisory eclipse.org
Affected: The Eclipse Foundation Eclipse Mosquitto
Published at:
Updated at:

References

Link Tags
https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191 mailing list vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-34431?
CVE-2021-34431 has been scored as a medium severity vulnerability.
How to fix CVE-2021-34431?
To fix CVE-2021-34431, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-34431 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-34431 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-34431?
CVE-2021-34431 affects The Eclipse Foundation Eclipse Mosquitto.
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