Improper input validation in Eclipse Mosquitto - CVE-2017-7650

Vulnerability identifier: #VU6840

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-7650

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to improper handling of usernames, containing ‘#’ or ‘+’ characters, within pattern based ACLs. A remote attacker can create a specially crafted username and bypass implemented security mechanisms.

Eclipse Mosquitto
Debian Linux
Fedora
mosquitto (Alpine package)
mosquitto

Update to version 1.4.12.

mosquitto (Alpine package) - update to 1.4.12-r0
mosquitto - addressed in versions 1.4.12-1.el7, 1.4.12-1.fc24, 1.4.12-1.fc25, 1.4.12-1.fc26

• http://mosquitto.org/category/security/

• Debian update for mosquitto
• Authentication bypass in Eclipse Mosquitto
• Improper input validation in mosquitto (Alpine package)
• Fedora 26 update for mosquitto
• Fedora 25 update for mosquitto
• Fedora 24 update for mosquitto
• Fedora EPEL 7 update for mosquitto