All network paths (UNCs) for Intranet sites must be disallowed.

From Microsoft Internet Explorer 10 Security Technical Implementation Guide

Part of DTBI375 - Network paths (UNC's) - Intranet

Associated with IA controls: ECSC-1

SV-45079r1_rule All network paths (UNCs) for Intranet sites must be disallowed.

Vulnerability discussion

Some UNC paths could refer to servers not managed by the organization, which means they could host malicious content; and therefore, it is safest to not include all UNC paths in the Intranet Sites zone. This policy setting controls whether URLs representing UNCs are mapped into the local Intranet security zone. If you enable this policy setting, all network paths are mapped into the Intranet Zone. If you disable this policy setting, network paths are not necessarily mapped into the Intranet Zone (other rules might map one there). If you do not configure this policy setting, users choose whether network paths are mapped into the Intranet Zone.

Check content

Fix text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> "Intranet Sites: Include all network paths (UNCs)" to "Disabled".

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