AlmaLinux OS 9 must be configured to disable USB mass storage.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269357 | ALMA-09-031370 | SV-269357r1050240_rule | CCI-000381 | medium |
| Description | ||||
| USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000378-GPOS-00163, SRG-OS-000114-GPOS-00059, SRG-OS-000690-GPOS-00140 | ||||
| STIG | Date | |||
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 | |||
Details
Check Text (C-269357r1050240_chk)
Verify that AlmaLinux OS 9 disables the ability to load the USB Storage kernel module with the following command:
$ grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/*
/etc/modprobe.d/usb-storage.conf:install usb-storage /bin/false
/etc/modprobe.d/usb-storage.conf:blacklist usb-storage
If the command does not return any output, or the line is commented out, and use of usb-storage is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.
Fix Text (F-73289r1048448_fix)
To configure the system to prevent the usb-storage kernel module from being loaded, run the following command:
$ cat << EOF | tee /etc/modprobe.d/usb-storage.conf
install usb-storage /bin/false
blacklist usb-storage
EOF