Internet links and Network UNCs created as embedded hyperlinks must be prevented.

From Microsoft Excel 2013 STIG

Part of DTOO138 - Internet and Network Path hyperlinks

Associated with: CCI-001170

SV-53725r1_rule Internet links and Network UNCs created as embedded hyperlinks must be prevented.

Vulnerability discussion

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.

Check content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2013 -> Excel Options -> Proofing -> Autocorrect Options "Internet and network paths as hyperlinks" is set to "Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\excel\options If the value AutoHyperlink is REG_DWORD = 0, this is not a finding.

Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2013 -> Excel Options -> Proofing -> Autocorrect Options "Internet and network paths as hyperlinks" to "Disabled".

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.