Details
Allows the redirection of Printers/Drives/Ports for RDP connections.
The recommended state for this setting is: Disabled.
Rationale:
In a security-sensitive environment, it is desirable to reduce the possible attack surface – preventing the redirection of COM, LPT and PnP ports will reduce the number of unexpected avenues for data exfiltration and/or malicious code transfer within an RDP session.
Solution
To establish the recommended configuration via GP, set the following UI path to: Disabled.
Computer ConfigurationPoliciesWindows SettingsSecurity SettingsSystem ServicesRemote Desktop Services UserMode Port Redirector
Impact:
Printers, drives and ports (COM, LPT, PnP, etc.) will not be allowed to be redirected inside RDP sessions.
Default Value:
Manual
CIS Controls:
Version 6
9.1 Limit Open Ports, Protocols, and Services
Ensure that only ports, protocols, and services with validated business needs are running on each system.
Version 7
9.2 Ensure Only Approved Ports, Protocols and Services Are Running
Ensure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Windows.