CVE-2021-34431
Last modified
CVE-2021-34431 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.11% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Eclipse | Mosquitto | >= 1.6, <= 2.0.10 |
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191Mailing List, Vendor Advisory
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191Mailing List, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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