Vulnerability · Published Jul 22, 2021 · Assigned by eclipse
CVE-2021-34431
Medium 6.5
In plain English
A medium-severity memory leak in Eclipse Mosquitto from The Eclipse Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.1%top 33.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mosquitto | 2.0.11-1 | DEBIAN-CVE-2021-34431 |
| Debian:13 | mosquitto | 2.0.11-1 | DEBIAN-CVE-2021-34431 |
| Debian:14 | mosquitto | 2.0.11-1 | DEBIAN-CVE-2021-34431 |
| Ubuntu:22.04:LTS | mosquitto | 2.0.11-1ubuntu1.1 | USN-6492-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto | 1.6 – before unspecifiedunspecified – through 2.0.10 |
Weakness: CWE-401
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191 x_refsource_CONFIRM