What is CVE-2021-41039?

CVE-2021-41039 is a vulnerability in versions 1.6 to 2.0.11 of Eclipse Mosquitto that can cause excessive CPU usage and lead to a loss of performance and possible denial of service when an MQTT v5 client connects with a large number of user-property properties.

How does CVE-2021-41039 affect Eclipse Mosquitto?

CVE-2021-41039 affects versions 1.6 to 2.0.11 of Eclipse Mosquitto by causing excessive CPU usage, which can result in a loss of performance and possible denial of service.

What is the severity of CVE-2021-41039?

CVE-2021-41039 has a severity rating of 7.5 (high).

How can I fix CVE-2021-41039 in Eclipse Mosquitto?

To fix CVE-2021-41039, you should update Eclipse Mosquitto to a version that is not affected, such as version 2.0.18.

Where can I find more information about CVE-2021-41039?

You can find more information about CVE-2021-41039 on the Eclipse Bugzilla website (https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314) and the Debian Security tracker (https://security-tracker.debian.org/tracker/CVE-2021-34434).

Vulnerability/
CVE-2021-41039

high

7.5

CWE

1050

1/12/2021

2/10/2023

CVE-2021-41039

First published: Wed Dec 01 2021(Updated: )

In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.

Credit: emo@eclipse.org emo@eclipse.org

Affected Software	Affected Version	How to fix
Eclipse Mosquitto	>=1.6<=2.0.11
debian/mosquitto	<=2.0.11-1	1.5.7-1+deb10u1 2.0.11-1+deb11u1 2.0.11-1.2 2.0.11-1.2+deb12u1 2.0.18-1

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Frequently Asked Questions

What is CVE-2021-41039?
CVE-2021-41039 is a vulnerability in versions 1.6 to 2.0.11 of Eclipse Mosquitto that can cause excessive CPU usage and lead to a loss of performance and possible denial of service when an MQTT v5 client connects with a large number of user-property properties.
How does CVE-2021-41039 affect Eclipse Mosquitto?
CVE-2021-41039 affects versions 1.6 to 2.0.11 of Eclipse Mosquitto by causing excessive CPU usage, which can result in a loss of performance and possible denial of service.
What is the severity of CVE-2021-41039?
CVE-2021-41039 has a severity rating of 7.5 (high).
How can I fix CVE-2021-41039 in Eclipse Mosquitto?
To fix CVE-2021-41039, you should update Eclipse Mosquitto to a version that is not affected, such as version 2.0.18.
Where can I find more information about CVE-2021-41039?
You can find more information about CVE-2021-41039 on the Eclipse Bugzilla website (https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314) and the Debian Security tracker (https://security-tracker.debian.org/tracker/CVE-2021-34434).

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agent/first-publish-date
agent/last-modified-date
agent/references
agent/remedy
agent/severity
agent/softwarecombine
agent/tags
agent/type
agent/weakness
collector/security-tracker-debian
vendor/eclipse
canonical/eclipse mosquitto
version/eclipse mosquitto/1.6
version/eclipse mosquitto/2.0.11
package-manager/debian

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