Detections
Analytics

1.335 OL08-00-040180

Information

OL 8 must disable the debug-shell systemd service.

GROUP ID: V-248872
RULE ID: SV-248872r991589

The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds a layer of assurance that it will not be enabled via a dependency in "system". This also prevents attackers with physical access from trivially bypassing security on the machine through valid troubleshooting configurations and gaining root access when the system is rebooted.

Solution

Configure the system to mask the "debug-shell systemd" service with the following command:

$ sudo systemctl mask debug-shell.service

Created symlink /etc/systemd/system/debug-shell.service -> /dev/null

Reload the daemon to take effect:

$ sudo systemctl daemon-reload

See Also

https://workbench.cisecurity.org/benchmarks/23791

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|III, CCI|CCI-000366, Rule-ID|SV-248872r991589_rule, STIG-ID|OL08-00-040180, Vuln-ID|V-248872

Plugin: Unix

Control ID: 41fa317948a2d41dce40de942e46f771a5ee8b36b0b3cea9b752e42b420717a7