Zone information must be preserved when saving attachments.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-220955 | WN10-UC-000020 | SV-220955r991589_rule | Medium |
| Description |
| Preserving zone of origin (internet, intranet, local, restricted) information on file attachments allows Windows to determine risk. |
| STIG | Date |
| Microsoft Windows 10 Security Technical Implementation Guide | 2024-11-25 |
Details
| Check Text (C-22670r555350_chk) |
| The default behavior is for Windows to mark file attachments with their zone information. If the registry Value Name below does not exist, this is not a finding. If it exists and is configured with a value of "2", this is not a finding. 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 Text (F-22659r555351_fix) |
| The default behavior is for Windows to mark file attachments with their zone information. If this needs to be corrected, 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". |