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V-223074

CAT II (Medium)

Internet Explorer must be configured to use machine settings.

Rule ID

SV-223074r961863_rule

STIG

Microsoft Internet Explorer 11 Security Technical Implementation Guide

Version

V2R7

CCIs

CCI-000366

Discussion

Users who change their Internet Explorer security settings could enable the execution of dangerous types of code from the Internet and websites listed in the Restricted Sites zone in the browser. This setting enforces consistent security zone settings to all users of the computer. Security zones control browser behavior at various websites and it is desirable to maintain a consistent policy for all users of a machine. This policy setting affects how security zone changes apply to different users. If you enable this policy setting, changes that one user makes to a security zone will apply to all users of that computer. If this policy setting is disabled or not configured, users of the same computer are allowed to establish their own security zone settings.

Check Content

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer 'Security Zones: Use only machine settings' must be 'Enabled'.  Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings Criteria: If the value "Security_HKLM_only" is REG_DWORD = 1, this is not a finding.

Fix Text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer 'Security Zones: Use only machine settings' to 'Enabled'.