Open files based on content, not file extension for Internet Zone is not disabled.

From Internet Explorer 8 STIG

Part of DTBI465 - MIME sniffing - Internet

Associated with IA controls: ECSC-1

SV-25573r1_rule Open files based on content, not file extension for Internet Zone is not disabled.

Vulnerability discussion

This policy setting allows you to manage MIME sniffing for file promotion from one type to another based on a MIME sniff. A MIME sniff is the recognition by Internet Explorer of the file type based on a bit signature. If you enable this policy setting, the MIME Sniffing Safety Feature will not apply in this zone. The security zone will run without the added layer of security provided by this feature. If you disable this policy setting, the actions that may be harmful cannot run; this Internet Explorer security feature will be turned on in this zone, as dictated by the feature control setting for the process.If you do not configure this policy setting, the MIME Sniffing Safety Feature will not apply in this zone.

Check content

Fix text

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Internet Zone -> "Open files based on content, not file extension" will be set to “Enabled” and "Disable" selected from down drop box. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3 Criteria: Set the value 2100 to REG_DWORD = 3.

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.

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