RHEL 9 must use the common access card (CAC) smart card driver.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-258121	SRG-OS-000104-GPOS-00051	RHEL-09-611160	SV-258121r1045243_rule	2025-02-27	2

Description
Smart card login provides two-factor authentication stronger than that provided by a username and password combination. Smart cards leverage public key infrastructure to provide and verify credentials. Configuring the smart card driver in use by the organization helps to prevent users from using unauthorized smart cards. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000109-GPOS-00056, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058

Description

Smart card login provides two-factor authentication stronger than that provided by a username and password combination. Smart cards leverage public key infrastructure to provide and verify credentials. Configuring the smart card driver in use by the organization helps to prevent users from using unauthorized smart cards. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000109-GPOS-00056, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058

ℹ️ Check
Verify that RHEL loads the CAC driver with the following command: $ sudo opensc-tool --get-conf-entry app:default:card_driver cac cac If "cac" is not listed as a card driver, or no line is returned for "card_drivers", this is a finding.

✔️ Fix
Configure RHEL 9 to load the CAC driver. $ sudo opensc-tool --set-conf-entry app:default:card_driver:cac Restart the pcscd service to apply the changes: $ sudo systemctl restart pcscd