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File validation in Excel must be enabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-223334 | O365-EX-000025 | SV-223334r879573_rule | Medium |
| Description |
|---|
| This policy setting allows you turn off the file validation feature. If you enable this policy setting, file validation will be turned off. If you disable or do not configure this policy setting, file validation will be turned on. Office Binary Documents (97-2003) are checked to see if they conform against the file format schema before they are opened. |
| STIG | Date |
|---|---|
| Microsoft Office 365 ProPlus Security Technical Implementation Guide | 2023-03-17 |
Details
| Check Text ( C-25007r442221_chk ) |
|---|
| Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Excel 2016 >> Excel Options >> Security >> Turn off file validation is set to "Disabled". Use the Windows Registry Editor to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\excel\security\filevalidation If the value for enableonload is REG_DWORD = 1, this is not a finding. |
| Fix Text (F-24995r442222_fix) |
|---|
| Set policy value for User Configuration >> Administrative Templates >> Microsoft Excel 2016 >> Excel Options >> Security >> Turn off file validation to "Disabled". |