Microsoft OneDrive STIG
Microsoft OneDrive Security Technical Implementation Guide. Version v2 r2, released Nov. 1, 2021.
DTOO605: OneDrive must only allow synchronizing of accounts for DoD organization instances.
If the organization is using a DoD instance of OneDrive, verify synchronizing is only allowed to the organization's DoD instance. If the organization does not have an instance of OneDrive, verify this is configured with the noted dummy entry to prevent synchronizing with other instances. If the following registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\OneDrive\AllowTenantList\ Value Name: Organization's Tenant GUID Value Type: REG_SZ Value: Organization's Tenant GUID If the organization does not have an instance of OneDrive, the Value Name and Value must be 1111-2222-3333-4444. If it is not, this is a finding.
Discussion
OneDrive provides access to external services for data storage, which must be restricted to authorized instances if enabled. Configuring this setting will restrict synchronizing of OneDrive accounts to DoD organization instances.
Fix
Configure the policy value for Computer Configuration >> Administrative Templates >> OneDrive >> "Allow syncing OneDrive accounts for only specific organizations", with the Tenant GUID of the organization's DoD instance in the format 1111-2222-3333-4444. If the organization does not have an instance of OneDrive, configure the Tenant GUID with "1111-2222-3333-4444". Group policy files for OneDrive are located on a system with OneDrive in "%localappdata%\Microsoft\OneDrive\BuildNumber\adm\". Copy the OneDrive.admx and .adml files to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO126: Add-on Management functionality must be allowed.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Add-on Management" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ADDON_MANAGEMENT Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Internet Explorer add-ons are pieces of code, run in Internet Explorer, to provide additional functionality. Rogue add-ons may contain viruses or other malicious code. Disabling or not configuring this setting could allow malicious code or users to become active on user computers or the network. For example, a malicious user can monitor and then use keystrokes users type into Internet Explorer. Even legitimate add-ons may demand resources, compromising the performance of Internet Explorer, and the operating systems for user computers.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Add-on Management" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO129: Links that invoke instances of Internet Explorer from within an Office product must be blocked.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Block popups" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WEBOC_POPUPMANAGEMENT Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
The Pop-up Blocker feature in Internet Explorer can be used to block most unwanted pop-up and pop-under windows from appearing. This functionality can be controlled separately for instances of Internet Explorer spawned by Office applications (for example, if a user clicks a link in an Office document or selects a menu option that loads a web page). If the Pop-up Blocker is disabled, disruptive and potentially dangerous pop-up windows could load and present a security risk.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Block popups" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO211: ActiveX Installs must be configured for proper restriction.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Restrict ActiveX Install" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_ACTIVEXINSTALL Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Microsoft ActiveX controls allow unmanaged, unprotected code to run on the user computers. ActiveX controls do not run within a protected container in the browser like the other types of HTML or Microsoft Silverlight-based controls. Disabling or not configuring this setting does not block prompts for ActiveX control installations, and these prompts display to users. This could allow malicious code to become active on user computers or the network.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Restrict ActiveX Install" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO607: The use of personal accounts for OneDrive synchronization must be disabled.
If the following registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_CURRENT_USER Registry Path: \Software\Policies\Microsoft\OneDrive\ Value Name: DisablePersonalSync Value Type: REG_DWORD Value: 0x00000001 (1)
Discussion
OneDrive provides access to external services for data storage, which must be restricted to authorized instances. Enabling this setting will prevent the use of personal OneDrive accounts for synchronization.
Fix
Configure the policy value for User Configuration >> Administrative Templates >> OneDrive >> "Prevent users from syncing personal OneDrive accounts" to "Enabled". Group policy files for OneDrive are located on a system with OneDrive in "%localappdata%\Microsoft\OneDrive\BuildNumber\adm\". Copy the OneDrive.admx and .adml files to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO209: Protection from zone elevation must be enforced.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Protection From Zone Elevation" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ZONE_ELEVATION Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Internet Explorer places restrictions on each web page users can use the browser to open. Web pages on a user's local computer have the fewest security restrictions and reside in the Local Machine zone, making this security zone a prime target for malicious users and code. Disabling or not configuring this setting could allow pages in the Internet zone to navigate to pages in the Local Machine zone to then run code to elevate privileges. This could allow malicious code or users to become active on user computers or the network.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Protection From Zone Elevation" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO123: Navigation to URLs embedded in Office products must be blocked.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Navigate URL" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_VALIDATE_NAVIGATE_URL Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
To protect users from attacks, Internet Explorer usually does not attempt to load malformed URLs. This functionality can be controlled separately for instances of Internet Explorer spawned by Office applications (for example, if a user clicks a link in an Office document or selects a menu option that loads a web page). If Internet Explorer attempts to load a malformed URL, a security risk could occur.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Navigate URL" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO117: Saved from URL mark to assure Internet zone processing must be enforced.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Saved from URL" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_UNC_SAVEDFILECHECK Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Typically, when Internet Explorer loads a web page from a Universal Naming Convention (UNC) share that contains a Mark of the Web (MOTW) comment, indicating the page was saved from a site on the Internet, Internet Explorer runs the page in the Internet security zone instead of the less restrictive Local Intranet security zone. This functionality can be controlled separately for instances of Internet Explorer spawned by Office applications (for example, if a user clicks a link in an Office document or selects a menu option that loads a web page). If Internet Explorer does not evaluate the page for a MOTW, potentially dangerous code could be allowed to run.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Saved from URL" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO124: Scripted Window Security must be enforced.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Scripted Window Security Restrictions" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WINDOW_RESTRICTIONS Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Malicious websites often try to confuse or trick users into giving a site permission to perform an action allowing the site to take control of the users' computers in some manner. Disabling or not configuring this setting allows unknown websites to: -Create browser windows appearing to be from the local operating system. -Draw active windows displaying outside of the viewable areas of the screen capturing keyboard input. -Overlay parent windows with their own browser windows to hide important system information, choices or prompts.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Scripted Window Security Restrictions" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO111: Enabling IE Bind to Object functionality must be present.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Bind to Object" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_SAFE_BINDTOOBJECT Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Internet Explorer performs a number of safety checks before initializing an ActiveX control. It will not initialize a control if the kill bit for the control is set in the registry, or if the security settings for the zone in which the control is located do not allow it to be initialized. This functionality can be controlled separately for instances of Internet Explorer spawned by Office applications (for example, if a user clicks a link in an Office document or selects a menu option that loads a web page). A security risk could occur if potentially dangerous controls are allowed to load.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Bind to Object" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO104: Disabling of user name and password syntax from being used in URLs must be enforced.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Disable user name and password" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_HTTP_USERNAME_PASSWORD_DISABLE Criteria: If the value groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
The Uniform Resource Locator (URL) standard allows user authentication to be included in URL strings in the form http://username:[email protected]. A malicious user might use this URL syntax to create a hyperlink that appears to open a legitimate website but actually opens a deceptive (spoofed) website. For example, the URL http://[email protected] appears to open http://www.wingtiptoys.com but actually opens http://example.com. To protect users from such attacks, Internet Explorer usually blocks any URLs using this syntax. This functionality can be controlled separately for instances of Internet Explorer spawned by Office applications (for example, if a user clicks a link in an Office document or selects a menu option that loads a website). If user names and passwords in URLs are allowed, users could be diverted to dangerous Web pages, which could pose a security risk.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Disable user name and password" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None
DTOO132: File Downloads must be configured for proper restrictions.
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Restrict File Download" is set to "Enabled" and 'groove.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD Criteria: If the value of groove.exe is REG_DWORD = 1, this is not a finding.
Discussion
Disabling this setting allows websites to present file download prompts via code without the user specifically initiating the download. User preferences may also allow the download to occur without prompting or interaction with the user. Even if Internet Explorer prompts the user to accept the download, some websites abuse this functionality. Malicious websites may continually prompt users to download a file or present confusing dialog boxes to trick users into downloading or running a file. If the download occurs and it contains malicious code, the code could become active on user computers or the network.
Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Restrict File Download" to "Enabled" and place a check in the 'groove.exe' check box.
Rating Info
DISA Cat II. NIST impact 3.
Expert Comment
None