Peripherals other than a keyboard, video, or mouse are attached to a KVM switch that is attached to ISs of different classification levels.

From Keyboard, Video, Mouse Switch Security STIG

Part of KVM Differing Classification Peripherals Attached

Associated with IA controls: DCBP-1

SV-6884r1_rule Peripherals other than a keyboard, video, or mouse are attached to a KVM switch that is attached to ISs of different classification levels.

Vulnerability discussion

It will be assumed that any peripheral other than a keyboard, video monitor, or mouse attached to a KVM switch is intended to be used regardless of the current configuration of the KVM switch. This peripheral can contain persistent memory that can be used to move data between ISs of different classification levels compromising either the data that was moved and the IS to which the data was moved.When the KVM switch is attached to ISs of different classification levels, the IAO, the SA, and the user will ensure that no peripheral other than the keyboard, video, or mouse is connected to the KVM.

Check content

The reviewer will view the KVM switch, used in an environment where it is attached to ISs of different clearance levels, to verify that no peripherals other than the keyboard, video, and mouse are attached.

Fix text

Remove the unauthorized peripheral and block the ports it is attached to with tamper resistant seals.

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