Ensure 'Set default file block behavior' is set to 'Enabled: Blocked files are not opened'

높음레벨 1자동office

설명

This policy setting determines if users can open, view, or edit Excel files that are by default blocked by Microsoft Office. The recommended state for this setting is: Enabled: Blocked files are not opened. Rationale: By default, users can open a wide range of legacy file formats in Office that were not designed with modern security protections in mind. Several of these formats have been associated with vulnerabilities that attackers have exploited. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\fileblock:openinprotectedview (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.

점검 방법

감사 방식: Windows 레지스트리

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\' + $s + '\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\fileblock') -Name 'openinprotectedview' -ErrorAction SilentlyContinue).'openinprotectedview'; if (-not ($null -ne $v -and @(0) -contains [int64]$v)) { $bad += $s + ':openinprotectedview=' + $v } }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') } }

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Excel 2016\Excel Options\Security\Trust Center\File Block Settings\Set Default File Block Behavior = Enabled: Blocked files are not opened

속성

운영 체제: 모두
태그: officeproductivitycis-l1
참고 자료: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.2.4.7.2.2.13 Ensure 'Set default file block behavior' is set to 'Enabled: Blocked files are not opened'

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target office