Memory Leak Vulnerability in Eclipse Mosquitto MQTT Broker
CVE-2021-34431

6.5MEDIUM

Key Information:

Vendor

The Eclipse Foundation

Status
Eclipse Mosquitto
Vendor
CVE Published:
22 July 2021

What is CVE-2021-34431?

In versions 1.6 to 2.0.10 of the Eclipse Mosquitto MQTT broker, an authenticated client connected via MQTT v5 can exploit a crafted CONNECT message, leading to a memory leak. This vulnerability may enable attackers to execute a Denial of Service (DoS) attack against the broker, impacting its performance and availability. Users are advised to update to the latest patched version to mitigate this risk.

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Deploy the Patch

Affected Version(s)

Eclipse Mosquitto 1.6

Eclipse Mosquitto <= 2.0.10

References

https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks to Kathrin Kleinhammer of OTARIS Interactive Services GmbH for discovering and reporting this issue.
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