All users must be able to directly initiate a session lock for all connection types.

From Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide

Associated with: CCI-000056 CCI-000058 CCI-000060

SV-90119r2_rule All users must be able to directly initiate a session lock for all connection types.

Vulnerability discussion

A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence.The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, Ubuntu operating systems need to provide users with the ability to manually invoke a session lock so users may secure their session should the need arise for them to temporarily vacate the immediate physical vicinity.Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011, SRG-OS-000031-GPOS-00012

Check content

Verify the Ubuntu operating system has the 'vlock' package installed, by running the following command: # dpkg -l | grep vlock vlock_2.2.2-7 If "vlock" is not installed, this is a finding.

Fix text

Install the "vlock" (if it is not already installed) package by running the following command: # sudo apt-get install vlock

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