Microsoft Windows 11

Zone information must be preserved when saving attachments

STIG ID: WN11-UC-000020 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Medium | CCI: CCI-000366 | Vulnerability ID: V-253478

Description

Preserving zone of origin (internet, intranet, local, restricted) information on file attachments allows Windows to determine risk.

Check

C-253478r991589_chk

The default behavior is for Windows to mark file attachments with their zone information.If it exists and is configured with a value of "1", this is a finding.Registry Hive: HKEY_CURRENT_USERRegistry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments\Value Name: SaveZoneInformationValue Type: REG_DWORDValue: 0x00000002 (2) (or if the Value Name does not exist)

Fix

F-56881r829517_fix

The default behavior is for Windows to mark file attachments with their zone information.To correct this, configure the policy value for User Configuration >> Administrative Templates >> Windows Components >> Attachment Manager >> "Do not preserve zone information in file attachments" to "Not Configured" or "Disabled".