Dynamic Security Plugin Vulnerability in Eclipse Mosquitto
CVE-2021-34434

5.3MEDIUM

Key Information:

Vendor

The Eclipse Foundation

Status
Eclipse Mosquitto
Vendor
CVE Published:
30 August 2021

What is CVE-2021-34434?

In versions 2.0 to 2.0.11 of Eclipse Mosquitto, a flaw exists in the dynamic security plugin. When a client's ability to subscribe to a topic is revoked while the client is offline, any existing subscriptions for that client are not correctly retracted. This oversight may lead to unauthorized access or message delivery to unintended clients, posing a risk to the integrity of the messaging system.

Affected Version(s)

Eclipse Mosquitto 2.0

Eclipse Mosquitto <= 2.0.11

References

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575324
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.