CVE-2017-7654 Denial of service in Eclipse Mosquitto

What is CVE-2017-7654?

CVE-2017-7654 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 5 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Eclipse Mosquitto 1.4.15 and earlier, a Memory Leak vulnerability was found within the Mosquitto Broker. Unauthenticated clients can send crafted CONNECT packets which could cause a denial of service in the Mosquitto Broker.

Weakness: CWE-772, CWE-401

Which versions are affected by CVE-2017-7654?

It affects 2 products.

Products include Debian Debian Linux, Eclipse Mosquitto.

How do I fix CVE-2017-7654?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-7654 being exploited?

There is no known exploitation of CVE-2017-7654 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-7654, GHSA-gp2q-hhpv-54m6, UBUNTU-CVE-2017-7654.