Vulnerability · Published Aug 30, 2021 · Assigned by eclipse
CVE-2021-34434
Medium 5.3
In plain English
A medium-severity security flaw 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 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.3Medium
Exploit odds (30 days)1.3%top 28.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a durable client is offline, then existing subscriptions for that client are not revoked.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mosquitto | 2.0.11-1.2+deb12u1 | DEBIAN-CVE-2021-34434 |
| Debian:12 | mosquitto | 2.0.11-1.2+deb12u1 | DSA-5511-1 |
| Debian:13 | mosquitto | 2.0.15-1 | DEBIAN-CVE-2021-34434 |
| Debian:14 | mosquitto | 2.0.15-1 | DEBIAN-CVE-2021-34434 |
| Ubuntu:22.04:LTS | mosquitto | 2.0.11-1ubuntu1.1 | USN-6492-1 |
| Ubuntu:22.04:LTS | mosquitto | 2.0.11-1ubuntu1.1 | UBUNTU-CVE-2021-34434 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto | 2.0 – before unspecifiedunspecified – through 2.0.11 |
Weakness: CWE-285
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=575324
- FEDORA-2021-aee8f32946 vendor-advisory
- FEDORA-2021-dc6df3744a vendor-advisory
- DSA-5511 vendor-advisory