title: Insufficient hostname validation during Clusterswitch message in Zoom Client for Meetings
description: The Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.10.0 fails to properly validate the hostname during a server switch request. This issue could be used in a more sophisticated attack to trick an unsuspecting users client to connect to a malicious server when attempting to use Zoom services.
problem types: Improper Input Validation
affected:
{
product: Zoom Client for Meetings for Android
vendor: Zoom Video Communications Inc
versions:
lessThan: 5.10.0, status: affected, version: unspecified, versionType: custom
}
{
product: Zoom Client for Meetings for iOS
vendor: Zoom Video Communications Inc
versions:
lessThan: 5.10.0, status: affected, version: unspecified, versionType: custom
}
{
product: Zoom Client for Meetings for Linux
vendor: Zoom Video Communications Inc
versions:
lessThan: 5.10.0, status: affected, version: unspecified, versionType: custom
}
{
product: Zoom Client for Meetings for MacOS
vendor: Zoom Video Communications Inc
versions:
lessThan: 5.10.0, status: affected, version: unspecified, versionType: custom
}
{
product: Zoom Client for Meetings for Windows
vendor: Zoom Video Communications Inc
versions:
lessThan: 5.10.0, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 5.9
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
version: 3.1
]