title: Improper Authentication Mechanism in B&R VC4 Visualization
description: Improper Authentication vulnerability in B&R Industrial Automation B&R VC4 (VNC-Server modules).  This vulnerability may allow an unauthenticated network-based attacker to bypass the authentication mechanism of the VC4 visualization on affected devices. The impact of this vulnerability depends on the functionality provided in the visualization.
This issue affects B&R VC4: from 3.* through 3.96.7, from 4.0* through 4.06.7, from 4.1* through 4.16.3, from 4.2* through 4.26.8, from 4.3* through 4.34.6, from 4.4* through 4.45.1, from 4.5* through 4.45.3, from 4.7* through 4.72.9.
problem types: CWE-287 Improper Authentication
affected:
{
defaultStatus: unaffected
modules: VNC-Server
product: B&R VC4
vendor: B&R Industrial Automation
versions:
lessThanOrEqual: 3.96.7, status: affected, version: 3.*, versionType: custom
lessThanOrEqual: 4.06.7, status: affected, version: 4.0*, versionType: custom
lessThanOrEqual: 4.16.3, status: affected, version: 4.1*, versionType: custom
lessThanOrEqual: 4.26.8, status: affected, version: 4.2*, versionType: custom
lessThanOrEqual: 4.34.6, status: affected, version: 4.3*, versionType: custom
lessThanOrEqual: 4.45.1, status: affected, version: 4.4*, versionType: custom
lessThanOrEqual: 4.45.3, status: affected, version: 4.5*, versionType: custom
lessThanOrEqual: 4.72.9, status: affected, version: 4.7*, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.8
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL