Ensure 'maxURL request filter' is configured

RendahLevel 2Otomatisiis

Deskripsi

The maxURL attribute of the <requestLimits> property is the maximum length (in Bytes) in which a requested URL can be (excluding query string) in order for IIS to accept. Configuring this Request Filter enables administrators to restrict the length of the requests that the server will accept. It is recommended that a limit be put on the length of URL. requestLimits maxUrl must be 4096 or lower at server level and for every site (default 4096). PowerShell 5.1 with the WebAdministration module; run elevated.

Cara pemeriksaan

Metode audit: Perintah shell

shell

Import-Module WebAdministration -ErrorAction Stop; $paths = @('MACHINE/WEBROOT/APPHOST') + @(Get-Website | ForEach-Object { "IIS:\Sites\$($_.Name)" }); $bad = @($paths | Where-Object { $c = Get-WebConfiguration -Filter 'system.webServer/security/requestFiltering/requestLimits' -PSPath $_; [long]$c.maxUrl -gt 4096 }); if ($bad.Count -eq 0) { 'compliant' } else { 'noncompliant' }

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST' -Filter system.webServer/security/requestFiltering/requestLimits -Name maxUrl -Value 4096

Properti

Sistem operasi: Apa saja
Tag: iisrequest-filtering
Referensi: CIS Microsoft IIS 10 Benchmark v1.2.1 - 4.2 Ensure 'maxURL request filter' is configured

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

shell

tmaegis scan --target iis --level 2