The operating system must automatically terminate a user session after inactivity time-outs have expired.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258840	PHTN-40-000093	SV-258840r933581_rule		Medium

Description
Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of network connections that are associated with communications sessions (i.e., network disconnect). A logical session (for local, network, and remote access) is initiated whenever a user (or process acting on behalf of a user) accesses an organizational information system. Such user sessions can be terminated (and thus terminate user access) without terminating network sessions. Session termination terminates all processes associated with a user's logical session except those processes that are specifically created by the user (i.e., session owner) to continue after the session is terminated. Conditions or trigger events requiring automatic session termination can include, for example, organization-defined periods of user inactivity, targeted responses to certain types of incidents, and time-of-day restrictions on information system use. This capability is typically reserved for specific operating system functionality where the system owner, data owner, or organization requires additional assurance. Satisfies: SRG-OS-000279-GPOS-00109, SRG-OS-000126-GPOS-00066

Description

Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of network connections that are associated with communications sessions (i.e., network disconnect). A logical session (for local, network, and remote access) is initiated whenever a user (or process acting on behalf of a user) accesses an organizational information system. Such user sessions can be terminated (and thus terminate user access) without terminating network sessions. Session termination terminates all processes associated with a user's logical session except those processes that are specifically created by the user (i.e., session owner) to continue after the session is terminated. Conditions or trigger events requiring automatic session termination can include, for example, organization-defined periods of user inactivity, targeted responses to certain types of incidents, and time-of-day restrictions on information system use. This capability is typically reserved for specific operating system functionality where the system owner, data owner, or organization requires additional assurance. Satisfies: SRG-OS-000279-GPOS-00109, SRG-OS-000126-GPOS-00066

STIG	Date
VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide	2023-10-29

Details

Check Text ( C-62580r933579_chk )
At the command line, run the following command: # grep -E "TMOUT=900" /etc/bash.bashrc /etc/profile.d/* Example result: /etc/profile.d/tmout.sh:TMOUT=900 If the "TMOUT" environmental variable is not set, the value is more than "900", or is set to "0", this is a finding.

Fix Text (F-62489r933580_fix)
Navigate to and open: /etc/profile.d/tmout.sh Set its content to the following: TMOUT=900 readonly TMOUT export TMOUT mesg n 2>/dev/null