Microsoft IIS
TMA-IIS-3.3
Ensure custom error messages are not off
Description
When an ASP.NET application fails and causes an HTTP/1.x 500 Internal Server Error, or a feature configuration (such as Request Filtering) prevents a page from being displayed, an error message will be generated. Administrators can choose whether or not the application should display a friendly message to the client, detailed error message to the client, or detailed error message to localhost only. customErrors mode must be RemoteOnly or On (not Off) in the root web.config and every site. PowerShell 5.1 with the WebAdministration module; run elevated.
Méthode de vérification
Méthode d'audit: Commande shell
Import-Module WebAdministration -ErrorAction Stop; $paths = @('MACHINE/WEBROOT') + @(Get-Website | ForEach-Object { "IIS:\Sites\$($_.Name)" }); $bad = @($paths | Where-Object { $c = Get-WebConfiguration -Filter 'system.web/customErrors' -PSPath $_; [string]$c.mode -eq 'Off' }); if ($bad.Count -eq 0) { 'compliant' } else { 'noncompliant' }- Sortie attendue
compliant
Méthode de correction
Méthode de correction: Recommandation ou correctif d'infrastructure
Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST/<site>' -Filter system.web/customErrors -Name mode -Value RemoteOnly
Propriétés
- Systèmes d'exploitation
- Tous
- Étiquettes
- iisinformation-disclosure
- Référence
- CIS Microsoft IIS 10 Benchmark v1.2.1 - 3.3 Ensure custom error messages are not off
Vérifier cet hôte
Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.
tmaegis scan --target iis --level 2