109 lines
4.5 KiB
PowerShell
109 lines
4.5 KiB
PowerShell
function Test-BlockMailForwarding {
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[CmdletBinding()]
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[OutputType([CISAuditResult])]
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param (
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# Parameters can be added if needed
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)
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begin {
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# Dot source the class script if necessary
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#. .\source\Classes\CISAuditResult.ps1
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# Initialization code, if needed
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$recnum = "6.2.1"
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<#
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Conditions for 6.2.1 (L1) Ensure all forms of mail forwarding are blocked and/or disabled
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Validate test for a pass:
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- Confirm that the automated test results align with the manual audit steps outlined in the CIS benchmark.
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- Specific conditions to check:
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- Condition A: Transport rules do not forward email to external domains.
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- Condition B: Anti-spam outbound policy is configured to disable automatic email forwarding to external domains.
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- Condition C: No exceptions to the forwarding rules unless explicitly defined by organizational policy.
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Validate test for a fail:
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- Confirm that the failure conditions in the automated test are consistent with the manual audit results.
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- Specific conditions to check:
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- Condition A: One or more transport rules forward email to external domains.
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- Condition B: Anti-spam outbound policy does not disable automatic email forwarding to external domains.
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- Condition C: Unapproved exceptions to the forwarding rules are present.
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#>
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}
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process {
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try {
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# 6.2.1 (L1) Ensure all forms of mail forwarding are blocked and/or disabled
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# Step 1: Retrieve the transport rules that redirect messages
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$transportRules,$nonCompliantSpamPolicies = Get-ExoOutput -Rec $recnum
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$transportForwardingBlocked = $transportRules.Count -eq 0
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# Step 2: Check all anti-spam outbound policies
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$nonCompliantSpamPoliciesArray = @($nonCompliantSpamPolicies)
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$spamForwardingBlocked = $nonCompliantSpamPoliciesArray.Count -eq 0
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# Determine overall compliance
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$forwardingBlocked = $transportForwardingBlocked -and $spamForwardingBlocked
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# Prepare failure reasons and details based on compliance
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$failureReasons = @()
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$details = @()
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if ($transportRules -ne 1) {
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# Fail Condition A
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$failureReasons += "Mail forwarding rules found: $($transportRules.Name -join ', ')"
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$details += "Transport Rules Details:`nRule Name|Redirects To"
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$details += $transportRules | ForEach-Object {
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"$($_.Name)|$($_.RedirectMessageTo -join ', ')"
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}
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$details += "`n"
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}
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if ($nonCompliantSpamPoliciesArray.Count -gt 0) {
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# Fail Condition B
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$failureReasons += "Outbound spam policies allowing automatic forwarding found."
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$details += "Policy|AutoForwardingMode"
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$details += $nonCompliantSpamPoliciesArray | ForEach-Object {
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"$($_.Name)|$($_.AutoForwardingMode)"
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}
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}
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if ($failureReasons.Count -eq 0) {
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$failureReasons = "N/A"
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$details = "Both transport rules and outbound spam policies are configured correctly to block forwarding."
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}
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else {
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$failureReasons = $failureReasons -join " | "
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$details = $details -join "`n"
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}
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# Populate the audit result
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$params = @{
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Rec = $recnum
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Result = $forwardingBlocked
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Status = if ($forwardingBlocked) { "Pass" } else { "Fail" }
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Details = $details
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FailureReason = $failureReasons
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}
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$auditResult = Initialize-CISAuditResult @params
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}
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catch {
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Write-Error "An error occurred during the test: $_"
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# Retrieve the description from the test definitions
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$testDefinition = $script:TestDefinitionsObject | Where-Object { $_.Rec -eq $recnum }
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$description = if ($testDefinition) { $testDefinition.RecDescription } else { "Description not found" }
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$script:FailedTests.Add([PSCustomObject]@{ Rec = $recnum; Description = $description; Error = $_ })
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# Call Initialize-CISAuditResult with error parameters
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$auditResult = Initialize-CISAuditResult -Rec $recnum -Failure
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}
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}
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end {
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# Return the audit result
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return $auditResult
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}
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}
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