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EDGE-00-000047 Site isolation for every site must be enabled.

DISA STIG library V2R5
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

Site isolation for every site must be enabled.

Control

The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable site isolation for every site" must be set to "enabled". Use the Windows Registry Editor to navigate to the following key: HKLM\SOFTWARE\Policies\Microsoft\Edge If the value for "SitePerProcess" is not set to "REG_DWORD = 1", this is a finding.

Discussion

The "SitePerProcess" policy can be used to prevent users from opting out of the default behavior of isolating all sites. The "IsolateOrigins" policy can be used to isolate additional, finer-grained origins. Enabling this policy prevents users from opting out of the default behavior where each site runs in its own process. If this policy is not disabled or configured, a user can opt out of site isolation (e.g., by using "Disable site isolation" entry in edge://flags.) Disabling the policy or not configuring the policy does not turn off Site Isolation.

Related controls

CCI-000381

Fix

Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable site isolation for every site" to "enabled".