TMA-EDGE-1.4.4

Ensure 'Control use of JavaScript JIT' is set to 'Enabled: Do not allow any site to run JavaScript JIT'

MittelStufe 2Automatisiertedge

Beschreibung

This policy setting specifies whether Microsoft Edge will run the v8 JavaScript engine with JIT (Just In Time) compiler. JIT is a complex pipeline of processes used to optimize JavaScript code for performance. Rationale: Microsoft's research has revealed that attackers usually target the JavaScript engine called “Just-In-Time (JIT) compilation” to hack web browsers. Disabling the JavaScript just-in-time (JIT) compiler prevents attackers from hacking into systems that Microsoft Edge uses. Audit reads the Group Policy registry value and prints 'compliant', 'unset' (policy not configured, reported as FAIL) or the non-compliant value. Registry value: HKLM\SOFTWARE\Policies\Microsoft\Edge:DefaultJavaScriptJitSetting (REG_DWORD); compliant when it is 2. Remediation writes 2 locally; in a domain set it through the ADMX so Group Policy does not revert it.

So wird geprüft

Prüfmethode: Windows-Registrierung

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge' -Name 'DefaultJavaScriptJitSetting' -ErrorAction SilentlyContinue).'DefaultJavaScriptJitSetting'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(2) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }

Erwartete Ausgabe: compliant

So wird behoben

Behebungsmethode: Shell-Befehl

shell

$p = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge'; if (-not (Test-Path -Path $p)) { New-Item -Path $p -Force | Out-Null }; New-ItemProperty -Path $p -Name 'DefaultJavaScriptJitSetting' -Value 2 -PropertyType DWord -Force | Out-Null

Eigenschaften

Betriebssysteme: Beliebig
Tags: edgebrowsercis-l2
Referenz: CIS Microsoft Edge Benchmark v5.0.0 - 1.4.4 Ensure 'Control use of JavaScript JIT' is set to 'Enabled: Do not allow any site to run JavaScript JIT'

Diesen Host prüfen

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shell

tmaegis scan --target edge --level 2