Ensure 'Allow VBA to load typelib references by path from untrusted intranet locations' is set to 'Disabled'

高レベル 1自動office

説明

This policy setting permits VBA to load typelib references by explicit path read from the project data if that path points to an intranet location that is not explicitly in the system trusted sites list. Rationale: The Visual Basic Application language can be abused by manipulating typelib references stored in untrusted locations. By preventing a user from overriding the default security settings this prevents a change to an unsecure state where harmful software could be more easily executed on a system. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\vba\security:allowvbaintranetreferences (REG_DWORD) in every loaded user hive (S-1-5-21-*) and is compliant when each holds 0. It prints 'no-user-hive-loaded' (FAIL) when no user profile is loaded, so scan while users are logged on.

チェック方法

監査方法: Windows レジストリ

registry

$sids = @(Get-ChildItem -Path 'Registry::HKEY_USERS' -ErrorAction SilentlyContinue | Where-Object { $_.PSChildName -match '^S-1-5-21-\d+-\d+-\d+-\d+$' } | ForEach-Object { $_.PSChildName }); if ($sids.Count -eq 0) { 'no-user-hive-loaded' } else { $bad = @(); foreach ($s in $sids) { $v = (Get-ItemProperty -Path ('Registry::HKEY_USERS\' + $s + '\SOFTWARE\Policies\Microsoft\vba\security') -Name 'allowvbaintranetreferences' -ErrorAction SilentlyContinue).'allowvbaintranetreferences'; if (-not ($null -ne $v -and @(0) -contains [int64]$v)) { $bad += $s + ':allowvbaintranetreferences=' + $v } }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') } }

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Office 2016\Security Settings\Allow VBA to load typelib references by path from untrusted intranet locations = Disabled

プロパティ

オペレーティングシステム: すべて
タグ: officeproductivitycis-l1
参照: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.3.27.6 Ensure 'Allow VBA to load typelib references by path from untrusted intranet locations' is set to 'Disabled'

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target office