Title

SLEM 5 must disable the USB mass storage kernel module. (Cat II impact)

Discussion

Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include but are not limited to such devices as flash drives, external storage, and printers.

Check Content

Verify SLEM 5 does not automount USB mass storage devices when connected to the host with the following command: > grep usb-storage /etc/modprobe.d/50-blacklist.conf blacklist usb-storage If the line is commented out or the line is missing, this is a finding.

Fix Text

Configure SLEM 5 to prevent USB mass storage devices from automounting when connected to the host. Add or modify the following line in the "/etc/modprobe.d/50-blacklist.conf" file: blacklist usb-storage

Additional Identifiers

Rule ID: SV-261347r996498_rule

Vulnerability ID: V-261347

Group Title: SRG-OS-000378-GPOS-00163

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.