TMA-OFFICE-2.2.4.7.2.3.1

Ensure 'Always open untrusted database files in Protected View' is set to 'Enabled'

高レベル 1自動office

説明

This policy setting controls whether database files (.dbf) opened from an untrusted location are always opened in Protected View. The recommended state for this setting is: Enabled. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise. Rationale: Files that originate from an untrusted location may contain malicious software. Requiring a user to open files originating from these zones forces them into a read-only mode. This reduces the chance of infection by making the user acknowledge a series of prompts before enabling editing. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\protectedview:enabledatabasefileprotectedview (REG_DWORD) in every loaded user hive (S-1-5-21-*) and is compliant when each holds 1. 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\' + $s + '\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\protectedview') -Name 'enabledatabasefileprotectedview' -ErrorAction SilentlyContinue).'enabledatabasefileprotectedview'; if (-not ($null -ne $v -and @(1) -contains [int64]$v)) { $bad += $s + ':enabledatabasefileprotectedview=' + $v } }; if ($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 Excel 2016\Excel Options\Security\Trust Center\Protected View\Always open untrusted database files in Protected View = Enabled

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 - 2.2.4.7.2.3.1 Ensure 'Always open untrusted database files in Protected View' is set to 'Enabled'

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