OL 8 must ensure session control is automatically started at shell initialization.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-248676	OL08-00-020041	SV-248676r779594_rule		Medium

Description
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, OL 8 needs to provide users with the ability to manually invoke a session lock so users can secure their session if it is necessary to temporarily vacate the immediate physical vicinity. Tmux is a terminal multiplexer that enables a number of terminals to be created, accessed, and controlled from a single screen. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011

Description

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, OL 8 needs to provide users with the ability to manually invoke a session lock so users can secure their session if it is necessary to temporarily vacate the immediate physical vicinity. Tmux is a terminal multiplexer that enables a number of terminals to be created, accessed, and controlled from a single screen. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011

STIG	Date
Oracle Linux 8 Security Technical Implementation Guide	2021-07-21

Details

Check Text ( C-52110r779592_chk )
Verify the operating system shell initialization file is configured to start each shell with the tmux terminal multiplexer with the following command: $ sudo grep -i tmux /etc/bashrc [ -n "$PS1" -a -z "$TMUX" ] && exec tmux If "tmux" is not configured as the example above, is commented out, or missing from the "/etc/bashrc" initialization file, this is a finding.

Fix Text (F-52064r779593_fix)
Configure the operating system to initialize the tmux terminal multiplexer as each shell is called by adding the following line to the end of the "/etc/bashrc" configuration file: [ -n "$PS1" -a -z "$TMUX" ] && exec tmux This setting will take effect at next logon.