RHEL 10 must be configured to disable USB mass storage.

STIG ID: RHEL-10-700850  |  SRG: SRG-OS-000114-GPOS-00059 |  Severity: medium (CAT II)  |  CCI: CCI-000778,CCI-001958 |  Vulnerability Id: V-281288

Vulnerability Discussion

USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity.

Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163

Check

Verify RHEL 10 disables the ability to load the USB Storage kernel module with the following command:

$ sudo grep -rs 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 either line is commented out, and use of USB Storage is not documented with the information system security officer as an operational requirement, this is a finding.

Fix

Configure RHEL 10 to prevent the usb-storage kernel module from being loaded.

Add the following lines to the file "/etc/modprobe.d/usb-storage.conf" (or create "usb-storage.conf" if it does not exist):

$ sudo vi /etc/modprobe.d/usb-storage.conf

install usb-storage /bin/false
blacklist usb-storage
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