title: Incomplete communication encryption and validation in B&R Automation Studio upgrade service
description: A missing secure communication definition and an incomplete TLS validation in the upgrade service in B&R Automation Studio versions 4.0.x, 4.1.x, 4.2.x, < 4.3.11SP, < 4.4.9SP, < 4.5.5SP, < 4.6.4 and < 4.7.2 enable unauthenticated users to perform MITM attacks via the B&R upgrade server.
problem types: CWE-326 Inadequate Encryption Strength
affected:
{
product: Automation Studio
vendor: B&R
versions:
status: affected, version: 4.0.x
status: affected, version: 4.1.x
status: affected, version: 4.2.x
status: affected, version: < 4.3.11SP
status: affected, version: < 4.4.9SP
status: affected, version: < 4.5.5SP
status: affected, version: < 4.6.3SP
status: affected, version: < 4.7.2
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
version: 3.1
]