Detections
Analytics

1.317 ALMA-09-041050

Information

AlmaLinux OS 9 must restrict access to the kernel message buffer.

GROUP ID: V-269425
RULE ID: SV-269425r1117266

Restricting access to the kernel message buffer limits access to only root. This prevents attackers from gaining additional system information as a nonprivileged user.

Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000138-GPOS-00069

Solution

Configure AlmaLinux OS 9 to restrict access to the kernel message buffer with the following command:

$ echo "kernel.dmesg_restrict = 1 > /etc/sysctl.d/60-dmesg.conf"

Load settings from all system configuration files with the following command:

$ sysctl --system

See Also

https://workbench.cisecurity.org/benchmarks/27039

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-2, 800-53|SC-4, CCI|CCI-001082, CCI|CCI-001090, Rule-ID|SV-269425r1117266_rule, STIG-ID|ALMA-09-041050, Vuln-ID|V-269425

Plugin: Unix

Control ID: ac5651306ff48e8cf1d92c8082d19945ac1f59c8f505f7a6d46dc062a08c9f2d