STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must disable automatic mounting of Universal Serial Bus (USB) mass storage driver.

DISA Rule

SV-275631r1147943_rule

Vulnerability Number

V-275631

Group Title

SRG-OS-000378-GPOS-00163

Rule Version

RIIM-OS-291010

Severity

CAT II

CCI(s)

• CCI-001958 - Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection.
• CCI-003959 - Prohibit the use or connection of unauthorized hardware components.

Weight

10

Fix Recommendation

Configure Ubuntu OS to disable using the USB storage kernel module.

Create and/or append a custom file under "/etc/modprobe.d/" to contain the following:

$ sudo su -c "echo install usb-storage /bin/false >> /etc/modprobe.d/stig.conf"

Configure Ubuntu OS to disable the ability to use USB mass storage devices.

$ sudo su -c "echo blacklist usb-storage >> /etc/modprobe.d/stig.conf"

Check Contents

Verify Ubuntu OS disables ability to load the USB storage kernel module by using the following command:

$ grep usb-storage /etc/modprobe.d/* | grep "/bin/false"
/etc/modprobe.d/stig.conf:install usb-storage /bin/false

If the command does not return any output, or the line is commented out, this is a finding.

Verify Ubuntu OS disables the ability to use USB mass storage device.

$ grep usb-storage /etc/modprobe.d/* | grep -i "blacklist"
/etc/modprobe.d/stig.conf:blacklist usb-storage

If the command does not return any output, or the line is commented out, this is a finding.

Vulnerability Number

V-275631

Documentable

False

Rule Version

RIIM-OS-291010

Severity Override Guidance

Verify Ubuntu OS disables ability to load the USB storage kernel module by using the following command:

$ grep usb-storage /etc/modprobe.d/* | grep "/bin/false"
/etc/modprobe.d/stig.conf:install usb-storage /bin/false

If the command does not return any output, or the line is commented out, this is a finding.

Verify Ubuntu OS disables the ability to use USB mass storage device.

$ grep usb-storage /etc/modprobe.d/* | grep -i "blacklist"
/etc/modprobe.d/stig.conf:blacklist usb-storage

If the command does not return any output, or the line is commented out, this is a finding.

Check Content Reference

M

Target Key

5706