STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must directly initiate a session lock for all connection types when the smart card is removed.

DISA Rule

SV-282372r1201380_rule

Vulnerability Number

V-282372

Group Title

SRG-OS-000028-GPOS-00009

Rule Version

TOSS-05-000269

Severity

CAT II

CCI(s)

• CCI-000056 - Retain the device lock until the user reestablishes access using established identification and authentication procedures.
• CCI-000057 - The information system initiates a session lock after the organization-defined time period of inactivity.

Weight

10

Fix Recommendation

Configure TOSS 5 to enable a user's session lock until that user reestablishes access using established identification and authentication procedures.

Select or create an authselect profile and incorporate the "with-smartcard-lock-on-removal" feature with the following example:

$ sudo authselect select sssd with-smartcard with-smartcard-lock-on-removal

Alternatively, edit the dconf settings in the /etc/dconf/db/* location.

Add or update the [org/gnome/settings-daemon/peripherals/smartcard] section of the /etc/dconf/db/local.d/00-security-settings" database file and add or update the following lines:

[org/gnome/settings-daemon/peripherals/smartcard]
removal-action='lock-screen'

Update the dconf system databases:

$ sudo dconf update

Check Contents

Verify TOSS 5 enables a user's session lock until that user reestablishes access using established identification and authentication procedures using the following command:

Note: This requirement assumes the use of the TOSS 5 default graphical user interface—the GNOME desktop environment. If the system does not have a graphical user interface installed, this requirement is not applicable.

$ grep -R removal-action /etc/dconf/db/*

/etc/dconf/db/distro.d/20-authselect:removal-action='lock-screen'

If the "removal-action='lock-screen'" setting is missing or commented out from the dconf database files, and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-282372

Documentable

False

Rule Version

TOSS-05-000269

Severity Override Guidance

Verify TOSS 5 enables a user's session lock until that user reestablishes access using established identification and authentication procedures using the following command:

Note: This requirement assumes the use of the TOSS 5 default graphical user interface—the GNOME desktop environment. If the system does not have a graphical user interface installed, this requirement is not applicable.

$ grep -R removal-action /etc/dconf/db/*

/etc/dconf/db/distro.d/20-authselect:removal-action='lock-screen'

If the "removal-action='lock-screen'" setting is missing or commented out from the dconf database files, and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Check Content Reference

M

Target Key

5738