Zone information must be preserved when saving attachments.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-253478 | SRG-OS-000480-GPOS-00227 | WN11-UC-000020 | SV-253478r991589_rule | 2025-02-25 | 2 |
| Description |
|---|
| Preserving zone of origin (internet, intranet, local, restricted) information on file attachments allows Windows to determine risk. |
| ℹ️ Check |
|---|
| 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_USER Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments\ Value Name: SaveZoneInformation Value Type: REG_DWORD Value: 0x00000002 (2) (or if the Value Name does not exist) |
| ✔️ 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". |