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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]
Vuln
Rule
Version
CCI
Severity
Title
Description
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 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 web page). If user names and passwords in URLs are allowed, users could be diverted to dangerous web pages, which could pose a security risk.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 a message informing users about the unsigned add-in. If a user is allowed to make the determination to allow an unsigned add-in, it increases the risk of malicious code being introduced onto the user's computer or the network.System AdministratorInformation Assurance OfficerECSC-1
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 dangerous file is opened from a trusted location, it will not be subject to standard security measures and could harm users' computers or data. By default, files located in trusted locations (those specified in the Trust Center) are assumed to be safe.System AdministratorInformation Assurance OfficerECSC-1
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 they are scanned by antivirus software immediately before being loaded. If this default configuration is modified, Office products will not require encrypted macros to be scanned before loading. They will be handled as specified by the Office System macro security settings, which can cause macro viruses to load undetected and lead to data loss or reduced application functionality.System AdministratorInformation Assurance OfficerECSC-1
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, users can specify "Trusted Locations" on network shares, or in other remote locations not under their direct control, by selecting the "Allow Trusted Locations on my network" (not recommended) check box in the "Trusted Locations" section of the Trust Center. If a dangerous file is opened from a trusted location, it will not be subject to typical security measures and could affect users' computers or data.System AdministratorInformation Assurance OfficerECSC-1
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 the file, or they may choose a format that is less secure than the Excel 2013 format. Users can still select a specific format when they save files, but they cannot change the default of this setting from the "Excel Options" dialog box. This enforced user behavior ensures any change to the file format requires additional deliberate user interaction.System AdministratorInformation Assurance OfficerECSC-1
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 depends on the Visual Basic for Applications project system in Word and Excel. By default, Excel, Word, and PowerPoint do not allow automation clients to have programmatic access to VBA projects. Users can enable this by selecting the Trust access to the VBA project object model in the Macro Settings section of the Trust Center. However, doing so allows macros in any documents the user opens to access the core Visual Basic objects, methods, and properties, which represents a potential security hazard.System AdministratorInformation Assurance OfficerECSC-1
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 Trust Bar and selecting the option to enable them. Disabling or not configuring this setting may allow dangerous macros to become active on user computers or the network.System AdministratorInformation Assurance OfficerECSC-1
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 Excel is allowed to load files with extensions that do not match their file types, a malicious individual can deceive users into loading dangerous files that have incorrect extensions.
By default, if users attempt to open files with the wrong extension, Excel opens the file and displays a warning that the file type is not what Excel expected.System AdministratorInformation Assurance OfficerECSC-1
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 it in the configured default web browser or the appropriate application. This functionality can enable users to accidentally create links to dangerous or restricted resources, which could create a security risk.System AdministratorInformation Assurance OfficerECSC-1
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 be able to see the updated data after every save, which can lead to the undesired disclosure of sensitive or incorrect information.
By default, a message dialog box displays every time the user saves a published workbook when AutoRepublish is enabled. From this dialog box, the user can disable AutoRepublish temporarily or permanently, or select "Do not show this message again" to prevent the dialog box from appearing after every save. If the user selects "Do not show this message again", Excel will continue to automatically republish the data after every save without informing the user.System AdministratorInformation Assurance OfficerECSC-1
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 malicious content into the document. Prompting the user to update links will allow the content to be updated only with the user's knowledge.
System AdministratorInformation Assurance OfficerECSC-1
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 following:
* External references are converted to values.
* Hidden formulas become visible.
* The "Set precision as displayed" option, which appears beneath the "When calculating this workbook" heading in the "Advanced" section of the "Excel Options" dialog box, is no longer available.
These types of changes can mean the version on the web page might not be the same as the Excel file. By default, a message dialog box appears every time the user saves a published workbook when AutoRepublish is enabled. From this dialog box, the user can disable AutoRepublish temporarily or permanently, or select "Do not show this message again" to prevent the dialog box from appearing after every save. If the user selects "Do not show this message again", Excel will continue to automatically republish the data after every save without informing the user.System AdministratorInformation Assurance OfficerECSC-1
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 zero-day attacks using graphic files as an attack vector. If such an event occurs, this setting can be used to mitigate the vulnerability.System AdministratorInformation Assurance OfficerECSC-1
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.
By default, Excel displays the Record Macro dialog box with "This Workbook already selected" in the drop-down menu. If a user saves a macro in the active workbook and then distributes the workbook to others, the macro is distributed along with the workbook, which could put workbook data at risk if the macro is triggered accidentally or intentionally.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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 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.System AdministratorInformation Assurance OfficerECSC-1
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:
-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.System AdministratorInformation Assurance OfficerECSC-1
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 active on user computers or the network.System AdministratorInformation Assurance OfficerECSC-1
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 malicious code. Usually the malicious code is run remotely and is used to elevate the privilege of restricted accounts on the computer. As a result, an attacker could gain access to a computer that they did not previously have access to. This could enable an attacker to read sensitive information from the computer's hard disk drive or install malware, such as a worm or a key logging program. The Office File Validation feature helps prevent file format attacks by scanning and validating files before they are opened. To validate files, Office File Validation compares a file's structure to a predefined file schema, which is a set of rules that determine what a readable file looks like. If Office File Validation detects that a file's structure does not follow all rules that are described in the schema, the file does not pass validation.System AdministratorInformation Assurance OfficerECSC-1
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 becomes publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 publicly known and a software update or service pack is available) by temporarily preventing users from opening specific types of files and to prevent a user from opening files that have been saved in earlier and pre-release (beta) Microsoft Office formats.System AdministratorInformation Assurance OfficerECSC-1
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 setting could allow malicious code to become active on user computers or the network.System AdministratorInformation Assurance OfficerECSC-1
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 policy setting, files downloaded from the Internet zone open in Protected View.System AdministratorInformation Assurance OfficerECSC-1
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. If enabling this policy setting, files located in unsafe locations do not open in Protected View. If disabling or not configuring this policy setting, files located in unsafe locations open in Protected View.System AdministratorInformation Assurance OfficerECSC-1
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 correctly.System AdministratorInformation Assurance OfficerECSC-1
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 attachments open in Protected View.System AdministratorInformation Assurance OfficerECSC-1
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. If this policy setting is enabled, Office 2013 applications cannot load any UI customization code included with documents and templates. If this policy setting is disabled or not configured, Office 2013 applications load any UI customization code included with a document or template when opening it, leaving the Office 2013 application susceptible to malicious code.System AdministratorInformation Assurance OfficerECSC-1
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 could potentially introduce malicious content to the local network. The WEBSERVICE function must be disabled in Excel and configured to notify user if a WEBSERVICE function is present in an Excel spreadsheet.System AdministratorInformation Assurance Officer
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 malicious tampering. By allowing the automatic handling of corrupt spreadsheets, malicious code may be introduced to the user's computer and the network.System AdministratorInformation Assurance Officer
Overview
RMF Control
Vuln Id
Rule Id
Version
CCI
Severity
Description
Details
Check Text ()
Fix Text ()
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