Ensure 'Disable additional security checks on VBA library references that may refer to unsafe locations on the local machine' is set to 'Disabled'

TinggiLevel 1Otomatisoffice

Deskripsi

This policy setting restricts VBA to checking project library references only against the registry and trusted zones. The recommended state for this setting is: Disabled Rationale: A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs, view, change, or delete data, or create new accounts with full user rights. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\vba\security:disablestrictvbarefssecurity (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.

Cara pemeriksaan

Metode audit: Registry Windows

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

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Office 2016\Security Settings\Disable additional security checks on VBA library references that may refer to unsafe locations on the local machine = Disabled

Properti

Sistem operasi: Apa saja
Tag: officeproductivitycis-l1
Referensi: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.3.27.9 Ensure 'Disable additional security checks on VBA library references that may refer to unsafe locations on the local machine' is set to 'Disabled'

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target office