title: Bypass of ZIA domain fronting detection module through evasion technique
description: In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.
problem types: CWE-295 Improper Certificate Validation
affected:
{
defaultStatus: unaffected
product: ZIA
vendor: Zscaler
versions:
lessThan: 6.2r.290, status: affected, version: 0, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 5.1
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL