Detections
Analytics
ALMA-09-041050 - AlmaLinux OS 9 must restrict access to the kernel message buffer.
Information
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://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CL_AlmaLinux_OS_9_V1R6_STIG.zip
Item Details
Audit Name: DISA Cloud Linux AlmaLinux OS 9 STIG v1r6
Category: SYSTEM AND COMMUNICATIONS PROTECTION
References: 800-53|SC-2, 800-53|SC-4, CAT|II, CCI|CCI-001082, CCI|CCI-001090, Rule-ID|SV-269425r1117266_rule, STIG-ID|ALMA-09-041050, Vuln-ID|V-269425
Plugin: Unix
Control ID: 1424183802d200ffcc84a84e579cd65b7ca0086651ca6784abae358ad4cd975f