Resource exhaustion in Eclipse Mosquitto - CVE-2023-5632

Vulnerability identifier: #VU83385

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-5632

CWE-ID: CWE-400

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 application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by establishing a connection to the mosquitto server without sending data, cause the EPOLLOUT event to be added, which results excessive CPU consumption.

Eclipse Mosquitto
IBM Integration Bus
openEuler
mosquitto
mosquitto-debuginfo
mosquitto-devel
mosquitto-debugsource
IBM App Connect Enterprise

Install updates from vendor's website.

Eclipse Mosquitto - update to 2.0.6
mosquitto - update to 2.0.16-1
mosquitto-debuginfo - update to 2.0.16-1
mosquitto-devel - update to 2.0.16-1
mosquitto-debugsource - update to 2.0.16-1
IBM Integration Bus - update to 10.1.0.2
IBM App Connect Enterprise - addressed in versions 11.0.0.23, 12.0.10.1

• https://github.com/eclipse/mosquitto/pull/2053
• https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d

• Denial of service in Eclipse Mosquitto
• Resource exhaustion in IBM App Connect Enterprise and IBM Integration Bus
• openEuler 22.03 LTS update for mosquitto
• openEuler 22.03 LTS SP1 update for mosquitto
• openEuler 22.03 LTS SP2 update for mosquitto