Documents must be configured to not open as Read Write when browsing.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-228543	DTOO179	SV-228543r508020_rule		Medium

Description
By default, when an Office 2013 document on a web server is opened using Internet Explorer, the appropriate application opens the file in read-only mode. However, if the default configuration is changed, the document is opened as read/write. Users could potentially make changes to documents and resave them in situations where the web server security is not configured to prevent such changes.

STIG	Date
Microsoft Office System 2013 Security Technical Implementation Guide	2020-09-25

Details

Check Text ( C-30776r498907_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Tools \| Options \| General \| Web Options... >> Files "Open Office documents as read/write while browsing" is set to "Disabled". Use the Windows Registry Editor to navigate to the following HKCU\Software\Policies\Microsoft\Office\15.0\common\internet If the value 'OpenDocumentsReadWriteWhileBrowsing' for REG_DWORD = 0, this is not a finding.

Check Text ( C-30776r498907_chk )

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Tools | Options | General | Web Options... >> Files "Open Office documents as read/write while browsing" is set to "Disabled".

Use the Windows Registry Editor to navigate to the following HKCU\Software\Policies\Microsoft\Office\15.0\common\internet

If the value 'OpenDocumentsReadWriteWhileBrowsing' for REG_DWORD = 0, this is not a finding.

Fix Text (F-30761r498908_fix)
Set the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Tools \| Options \| General \| Web Options... >> Files "Open Office documents as read/write while browsing" to "Disabled".