The system must have USB Mass Storage disabled unless needed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22579	GEN008480	SV-26970r4_rule		Low

Description
USB is a common computer peripheral interface. USB devices may include storage devices that could be used to install malicious software on a system or exfiltrate data.

STIG	Date
Solaris 10 X86 Security Technical Implementation Guide	2019-12-31

Details

Check Text ( C-27917r6_chk )
If the system needs a particular USB driver for storage, this vulnerability is not applicable. Check the current loaded kernel modules: # modinfo \| grep usb_ac # modinfo \| grep usb_as # modinfo \| grep hid # modinfo \| grep scsa2usb # modinfo \| grep usbprn # modinfo \| grep usbser_edge If any command produces output, this is a finding. Check the configuration of the /etc/system file: # grep 'exclude: usb_ac' /etc/system # grep 'exclude: usb_as' /etc/system # grep 'exclude: hid' /etc/system # grep 'exclude: scsa2usb' /etc/system # grep 'exclude: usbprn' /etc/system # grep 'exclude: usbser_edge' /etc/system If no results are returned from any particular command, this is a finding.

Check Text ( C-27917r6_chk )

If the system needs a particular USB driver for storage, this vulnerability is not applicable.

Check the current loaded kernel modules:

# modinfo | grep usb_ac
# modinfo | grep usb_as
# modinfo | grep hid
# modinfo | grep scsa2usb
# modinfo | grep usbprn
# modinfo | grep usbser_edge

If any command produces output, this is a finding.

Check the configuration of the /etc/system file:

# grep 'exclude: usb_ac' /etc/system
# grep 'exclude: usb_as' /etc/system
# grep 'exclude: hid' /etc/system
# grep 'exclude: scsa2usb' /etc/system
# grep 'exclude: usbprn' /etc/system
# grep 'exclude: usbser_edge' /etc/system

If no results are returned from any particular command, this is a finding.

Fix Text (F-24232r6_fix)
Prevent the USB drivers from loading: # echo "exclude: usb_ac" >> /etc/system # echo "exclude: usb_as" >> /etc/system # echo "exclude: hid" >> /etc/system # echo "exclude: scsa2usb" >> /etc/system # echo "exclude: usbprn" >> /etc/system # echo "exclude: usbser_edge" >> /etc/system The system must be restarted for these changes to take effect.