Policy selection for ADMX packs

Policy overview

Key metadata and intent for this policy.

ClassUser

CategoryWindows Components > Internet Explorer > Security Features > Mime Sniffing Safety Feature

Supported onAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2003, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista, WindowsXP

This policy setting determines whether Internet Explorer MIME sniffing will prevent promotion of a file of one type to a more dangerous file type. This policy setting allows administrators to define applications for which they want this security feature to be prevented or allowed. If you enable this policy setting and enter a Value of 1, this protection will be in effect. If you enter a Value of 0, any file may be promoted to more dangerous file types. The Value Name is the name of the executable. If a Value Name is empty or the Value is not 0 or 1, the policy setting is ignored. Do not enter the Internet Explorer processes in this list: use the related Internet Explorer Processes policy to enable or disable IE processes. If the All Processes policy setting is enabled, the processes configured in this box take precedence over that setting. If you disable or do not configure this policy setting, the security feature is allowed.

Internal name

IESF_PolicyProcessList_6

Policy ID

4d7508265203

Elements

Registry values

How enabled and disabled states update the registry.

Registry location	Type	Enabled value	Disabled value
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\ListBox_Support_FEATURE_MIME_SNIFFING	REG_DWORD	1	0

Policy elements

Inputs and configuration options exposed by this policy.

Element	Type	Registry mapping	Constraints & behavior
Process List: ID IESF_PartnameProcessList	list	HKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING\ListBox_Support_FEATURE_MIME_SNIFFING Type REG_MULTI_SZ	List: additive, explicit value

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