Check: RHEL-09-211045
RHEL 9 STIG:
RHEL-09-211045
(in versions v1 r3 through v1 r1)
Title
The systemd Ctrl-Alt-Delete burst key sequence in RHEL 9 must be disabled. (Cat I impact)
Discussion
A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227
Check Content
Verify RHEL 9 is configured to not reboot the system when Ctrl-Alt-Delete is pressed seven times within two seconds with the following command: $ grep -i ctrl /etc/systemd/system.conf CtrlAltDelBurstAction=none If the "CtrlAltDelBurstAction" is not set to "none", commented out, or is missing, this is a finding.
Fix Text
Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file: CtrlAltDelBurstAction=none Reload the daemon for this change to take effect. $ sudo systemctl daemon-reload
Additional Identifiers
Rule ID: SV-257784r925339_rule
Vulnerability ID: V-257784
Group Title: SRG-OS-000324-GPOS-00125
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000366 |
The organization implements the security configuration settings. |
| CCI-002235 |
The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. |