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


Finding ID Version Rule ID IA Controls Severity
V-258840 PHTN-40-000093 SV-258840r933581_rule Medium
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
VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide 2023-10-29


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:


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:


Set its content to the following:

readonly TMOUT
export TMOUT
mesg n 2>/dev/null