Input validation error in Eclipse Mosquitto - CVE-2017-7653

Vulnerability identifier: #VU81667

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-7653

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of not valid UTF-8 string. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Eclipse Mosquitto
Fedora
Junos OS
Junos OS Evolved
mosquitto

Install updates from vendor's website.

Eclipse Mosquitto - update to 1.5
Junos OS - addressed in versions 19.1R3-S10, 19.2R3-S7, 19.3R3-S8, 19.4R3-S11, 20.2R3-S7, 20.3R3-S6, 20.4R3-S7, 21.1R3-S4, 21.2R3-S5, 21.3R3-S4, 21.4R3-S4, 22.1R3, 22.2R3, 22.3R2, 22.4R1
Junos OS Evolved - addressed in versions 20.4R3-S7-EVO, 21.4R3-S4-EVO, 22.1R3-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.4R1-EVO
mosquitto - update to 1.5.3-1.el7

• 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

• Multiple vulnerabilities in Eclipse Mosquitto
• Junos OS and Junos OS Evolved update for MQTT
• Fedora EPEL 7 update for mosquitto