Microsoft Excel 2013 STIG

The Microsoft Excel 2013 Security Technical Implementation Guide (STIG) is published as a tool to improve the security of Department of Defense (DoD) information systems. Comments or proposed revisions to this document should be sent via e-mail to the following address: [email protected]

Details

Version / Release: V1R4

Published: 2015-06-18

Updated At: 2018-09-23 04:09:29

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Drop CKL or SCAP (XCCDF) results here.

    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-53609r1_rule DTOO104 MEDIUM Disabling of user name and password syntax from being used in URLs must be enforced. 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 websi
    SV-53618r1_rule DTOO111 MEDIUM Internet Explorer Bind to Object functionality must be enabled. 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
    SV-53629r1_rule DTOO117 MEDIUM The Saved from URL mark must be selected to enforce Internet zone processing. 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 se
    SV-53679r1_rule DTOO123 MEDIUM Navigation to URLs embedded in Office products must be blocked. 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
    SV-53683r1_rule DTOO129 MEDIUM Links that invoke instances of Internet Explorer from within an Office product must be blocked. 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 exampl
    SV-53711r1_rule DTOO131 MEDIUM Trust Bar Notifications for unsigned application add-ins must be blocked. If an application is configured to require all add-ins to be signed by a trusted publisher, any unsigned add-ins the application loads will be disabled and the application will display the Trust Bar at the top of the active window. The Trust Bar contains
    SV-53824r1_rule DTOO210 MEDIUM The opening of pre-release versions of file formats new to Excel 2013 through the Compatibility Pack for Office 2013 and Excel 2013 Converter must be blocked. By default, users are prompted to update automatic links.System AdministratorInformation Assurance OfficerECSC-1
    SV-53723r1_rule DTOO133 MEDIUM All automatic loading from trusted locations must be disabled. Trusted locations specified in the Trust Center are used to define file locations assumed to be safe. Content, code, and add-ins are allowed to load from trusted locations with a minimal amount of security, without prompting the users for permission. If a
    SV-53810r1_rule DTOO142 MEDIUM The scanning of encrypted macros in open XML documents must be enforced. When an Office Open XML document (Word, Excel, and PowerPoint) is rights-managed, or password-protected, any macros embedded in the document are encrypted along with the rest of the contents. By default, these encrypted macros will be disabled unless the
    SV-53724r1_rule DTOO134 MEDIUM Disallowance of trusted locations on the network must be enforced. Files located in trusted locations and specified in the Trust Center are typically assumed to be safe. Content, code, and add-ins are allowed to load from trusted locations with minimal security and without prompting the user for permission. By default, u
    SV-53726r1_rule DTOO139 MEDIUM The Save commands default file format must be configured. When users create new Excel files, Excel 2013 saves them in the new *.xlsx format. Ensure this setting is enabled to specify all new files are created in Excel 2013. If a new file is created in an earlier format, some users may not be able to open or use
    SV-53813r1_rule DTOO146 MEDIUM Trust access for VBA must be disallowed. VSTO projects require access to the Visual Basic for Applications project system in Excel, PowerPoint, and Word, even though the projects do not use Visual Basic for Applications. Design-time support of controls in both Visual Basic and C# projects depend
    SV-53838r1_rule DTOO304 MEDIUM Warning Bar settings for VBA macros must be configured. When users open files containing VBA macros, applications open the files with the macros disabled and displays the Trust Bar with a warning that macros are present and have been disabled. Users may then enable these macros by clicking "Options" on the Tru
    SV-53811r1_rule DTOO143 MEDIUM File types must be configured to provide mismatch warnings Excel can load files with extensions that do not match the files' type. For example, if a comma-separated values (CSV) file named example.csv is renamed example.xls, Excel can properly load it as a CSV file. Some attacks target specific file formats. If E
    SV-53725r1_rule DTOO138 MEDIUM Internet links and Network UNCs created as embedded hyperlinks must be prevented. When users type a string of characters, Excel recognizes as a Uniform Resource Locator (URL) or Uniform Naming Convention (UNC) path to a resource on the Internet or a local network, Excel will transform it into a hyperlink. Clicking the hyperlink opens i
    SV-53731r1_rule DTOO140 MEDIUM Automatic republish to web pages must be disallowed. If users choose to publish Excel data to a static web page and enable the AutoRepublish feature, Excel saves a copy of the data to the web page every time the user saves the workbook. If the page is on a web server, anyone who has access to the page will
    SV-53815r1_rule DTOO150 MEDIUM The Update of automatic links setting must be configured to prompt user before allowing links to be updated. If an Excel workbook contains links to other documents and users are not prompted to approve them, the contents of the workbook might change without the users' knowledge because the linked files have changed. This has the risk of introducing corrupt or ma
    SV-53803r1_rule DTOO141 MEDIUM The AutoRepublish warning alert must be provided. AutoRepublish is a feature in Excel allowing workbooks to be automatically republished to the World Wide Web each time the workbook is saved. A number of changes might need to be made to allow the workbook to be successfully published, including the follo
    SV-53820r1_rule DTOO152 MEDIUM The loading of images from web pages must not be allowed. When users open web pages in Excel, Excel loads any graphics included in the pages, regardless of whether or not they were originally created in Excel. Allowing Excel to load graphics created in other programs can make Excel vulnerable to possible future
    SV-53812r1_rule DTOO145 MEDIUM Macro storage must be in personal macro workbooks. The Record Macro dialog box includes a drop-down menu allowing users to choose whether to store the new macro in the current workbook, a new workbook, or their personal macro workbook (Personal.xlsb), a hidden workbook that opens every time Excel starts.
    SV-53681r1_rule DTOO126 MEDIUM Add-on Management functionality must be allowed. 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
    SV-53822r1_rule DTOO209 MEDIUM Protection from zone elevation must be enforced. 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 malicio
    SV-53827r1_rule DTOO211 MEDIUM ActiveX Installs must be configured for proper restriction. 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 confi
    SV-53713r1_rule DTOO132 MEDIUM File downloads must be configured for proper restrictions. 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 Interne
    SV-53680r1_rule DTOO124 MEDIUM Scripted Window Security must be enforced. 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: -Crea
    SV-53682r1_rule DTOO127 MEDIUM Add-ins to Office applications must be signed by a Trusted Publisher. Office 2013 applications do not, by default, check the digital signature on application add-ins before opening them. Disabling or not configuring this setting may allow an application to load a dangerous add-in. As a result, malicious code could become
    SV-53632r1_rule DTOO119 MEDIUM Configuration for file validation must be enforced. Office File Validation helps detect and prevent a kind of exploit known as a file format attack or file fuzzing attack. File format attacks exploit the integrity of a file. They occur when someone modifies the structure of a file with the intent of adding
    SV-53678r2_rule DTOO122 MEDIUM Open/Save actions for dBase III / IV files must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur during between the time that a vulnerability b
    SV-53620r1_rule DTOO112 MEDIUM Open/Save actions for Dif and Sylk files must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53622r1_rule DTOO113 MEDIUM Open/Save actions for Excel 2 macrosheets and add-in files must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53624r1_rule DTOO114 MEDIUM Open/Save actions for Excel 2 worksheets must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53626r1_rule DTOO115 MEDIUM Open/Save actions for Excel 3 macrosheets and add-in files must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53628r1_rule DTOO116 MEDIUM Open/Save actions for Excel 3 worksheets must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53610r1_rule DTOO105 MEDIUM Open/Save actions for Excel 4 macrosheets and add-in files must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53611r1_rule DTOO106 MEDIUM Open/Save actions for Excel 4 workbooks must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53612r1_rule DTOO107 MEDIUM Open/Save actions for Excel 4 worksheets must be blocked. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53614r1_rule DTOO108 MEDIUM Actions for Excel 95 workbooks must be configured to edit in Protected View. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53615r1_rule DTOO109 MEDIUM Actions for Excel 95-97 workbooks and templates must be configured to edit in Protected View. This setting specifies whether users can open, view, edit, or save files saved in the specified format. Enabling block of the specified format mitigates zero-day security attacks (which are attacks that occur between the time that a vulnerability becomes
    SV-53617r1_rule DTOO110 MEDIUM Blocking as default file block opening behavior must be enforced. Users can open, view, or edit a large number of file types in Office 2013. Some file types are safer than others, as some could allow malicious code to become active on user computers or the network. For this reason, disabling or not configuring this se
    SV-53638r2_rule DTOO120 LOW Open/Save actions for web pages and Excel 2003 XML spreadsheets must be blocked. This policy setting allows for determining whether users can open, view, edit, or save Excel files with the format specified by the titleSystem AdministratorInformation Assurance OfficerECSC-1
    SV-53676r1_rule DTOO121 MEDIUM Files from the Internet zone must be opened in Protected View. This policy setting allows for determining if files downloaded from the Internet zone open in Protected View. If enabling this policy setting, files downloaded from the Internet zone do not open in Protected View. If disabling or not configuring this poli
    SV-53831r1_rule DTOO288 MEDIUM Files in unsafe locations must be opened in Protected View. This policy setting determines whether files located in unsafe locations will open in Protected View. If unsafe locations have not been specified, only the "Downloaded Program Files" and "Temporary Internet Files" folders are considered unsafe locations.
    SV-53834r1_rule DTOO292 MEDIUM Document behavior if file validation fails must be set. This policy key controls how Office documents should be handled when failing file validation. By requiring such documents to be opened in Protected View, any potentially malicious code would be disabled, allowing the user to edit the document and resave c
    SV-53837r1_rule DTOO293 MEDIUM Excel attachments opened from Outlook must be in Protected View. This policy setting allows for determining whether Excel files in Outlook attachments open in Protected View. If enabling this policy setting, Outlook attachments do not open in Protected View. If disabling or not configuring this policy setting, Outlook
    SV-53839r1_rule DTOO305 MEDIUM Excel 2013 application must be prevented from loading any custom user interface (UI) code. This policy setting controls whether Office 2013 applications load any custom user interface (UI) code included with a document or template. Office 2013 allows developers to extend the UI with customization code that is included in a document or template
    SV-53841r1_rule DTOO418 CCI-001662 MEDIUM WEBSERVICE functions must be disabled. The WEBSERVICE function option, when used in an Excel spreadsheet, returns data from a web service on the Internet or Intranet. If allowed to be used, security is significantly reduced by allowing information disclosure to third party web services and cou
    SV-53843r1_rule DTOO419 CCI-001662 MEDIUM Corrupt workbook options must be disallowed. This setting controls whether Excel presents users with a list of data extraction options before beginning an Open and Repair operation when users choose to open a corrupt workbook in repair or extract mode. A corrupt Excel file may be indicative of malic