CVE-2017-7653

Severity: medium (CVSS 5.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-05 · updated 2026-06-17
Weakness: CWE-20

Description

The Eclipse Mosquitto broker up to version 1.4.15 does not reject strings that are not valid UTF-8. A malicious client could cause other clients that do reject invalid UTF-8 strings to disconnect themselves from the broker by sending a topic string which is not valid UTF-8, and so cause a denial of service for the clients.

Affected products

Debian Linux: 8.0, 9.0
The Eclipse Foundation Eclipse Mosquitto: through 1.4.15

References

http://docs.oasis-open.org/mqtt/disallowed-chars/v1.0/disallowed-chars-v1.0.pdf
https://bugs.eclipse.org/bugs/show_bug.cgi?id=532113
https://lists.debian.org/debian-lts-announce/2018/09/msg00036.html
https://usn.ubuntu.com/4023-1/
https://www.debian.org/security/2018/dsa-4325
http://docs.oasis-open.org/mqtt/disallowed-chars/v1.0/disallowed-chars-v1.0.pdf
https://bugs.eclipse.org/bugs/show_bug.cgi?id=532113
https://lists.debian.org/debian-lts-announce/2018/09/msg00036.html
https://usn.ubuntu.com/4023-1/
https://www.debian.org/security/2018/dsa-4325

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