NULL pointer dereference in Eclipse Mosquitto - CVE-2017-7655

Vulnerability identifier: #VU18088

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-7655

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a NULL pointer dereference error in lib/messages_mosq.c. A remote attacker can perform a denial of service (DoS) attack against the application, using the vulnerable library.

Eclipse Mosquitto
Junos OS
Junos OS Evolved

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

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=533775

• Multiple vulnerabilities in Eclipse Mosquitto
• Junos OS and Junos OS Evolved update for MQTT