description: In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.
problem types: CWE-476: NULL Pointer Dereference
affected:
{
product: Eclipse Mosquitto
vendor: The Eclipse Foundation
versions:
lessThan: unspecified, status: affected, version: 2.0, versionType: custom
lessThanOrEqual: 2.0.9, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
exploitCodeMaturity: FUNCTIONAL
integrityImpact: NONE
privilegesRequired: LOW
remediationLevel: OFFICIAL_FIX
reportConfidence: CONFIRMED
scope: UNCHANGED
temporalScore: 6
temporalSeverity: MEDIUM
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C
version: 3.1
]