tests/Test-RestrictExternalSharing.ps1
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function Test-RestrictExternalSharing { [CmdletBinding()] [OutputType([CISAuditResult])] param ( # Aligned # Define your parameters here ) begin { <# Conditions for 7.2.3 (L1) Ensure external content sharing is restricted Validate test for a pass: - Confirm that the automated test results align with the manual audit steps outlined in the CIS benchmark. - Specific conditions to check: - Condition A: The SharingCapability is set to "ExternalUserSharingOnly" or more restrictive in the SharePoint admin center. - Condition B: Using PowerShell, the SharingCapability property for the SharePoint tenant is set to "ExternalUserSharingOnly", "ExistingExternalUserSharingOnly", or "Disabled". - Condition C: The external sharing settings in SharePoint Online and OneDrive are set to the same or a more restrictive level than the organization’s sharing settings. Validate test for a fail: - Confirm that the failure conditions in the automated test are consistent with the manual audit results. - Specific conditions to check: - Condition A: The SharingCapability is set to "Anyone" or "ExternalUserAndGuestSharing" in the SharePoint admin center. - Condition B: Using PowerShell, the SharingCapability property for the SharePoint tenant is set to "Anyone" or "ExternalUserAndGuestSharing". - Condition C: The external sharing settings in SharePoint Online and OneDrive are set to a more permissive level than the organization’s sharing settings. #> # Dot source the class script if necessary #. .\source\Classes\CISAuditResult.ps1 # Initialization code, if needed $recnum = "7.2.3" Write-Verbose "Running Test-RestrictExternalSharing for $recnum..." } process { try { # 7.2.3 (L1) Ensure external content sharing is restricted # Retrieve the SharingCapability setting for the SharePoint tenant <# $SPOTenantSharingCapability = [PSCustomObject]@{ SharingCapability = "ExternalUserAndGuestSharing" } #> $SPOTenantSharingCapability = Get-CISSpoOutput -Rec $recnum $isRestricted = $SPOTenantSharingCapability.SharingCapability -in @('ExternalUserSharingOnly', 'ExistingExternalUserSharingOnly', 'Disabled') # Prepare failure reasons and details based on compliance # Condition B: Using PowerShell, the SharingCapability property for the SharePoint tenant is set to "ExternalUserSharingOnly", "ExistingExternalUserSharingOnly", or "Disabled". $failureReasons = if (-not $isRestricted) { "External content sharing is not adequately restricted. Current setting: $($SPOTenantSharingCapability.SharingCapability)`n" + ` "The acceptable values for SharingCapability are: 'ExternalUserSharingOnly', 'ExistingExternalUserSharingOnly', or 'Disabled'.`n" + ` "To remediate this setting, use the Set-SPOTenant cmdlet to set the SharingCapability property to an acceptable value:`n`n" + ` "Set-SPOTenant -SharingCapability <acceptable value from above>" } else { "N/A" } # Condition A: The SharingCapability is set to "ExternalUserSharingOnly" or more restrictive in the SharePoint admin center. # Condition C: The external sharing settings in SharePoint Online and OneDrive are set to the same or a more restrictive level than the organization’s sharing settings. $details = "SharingCapability: $($SPOTenantSharingCapability.SharingCapability)" # Create and populate the CISAuditResult object $params = @{ Rec = $recnum Result = $isRestricted Status = if ($isRestricted) { "Pass" } else { "Fail" } Details = $details FailureReason = $failureReasons } $auditResult = Initialize-CISAuditResult @params } catch { $LastError = $_ $auditResult = Get-TestError -LastError $LastError -recnum $recnum } } end { # Return auditResult return $auditResult } } |