Details

The `udf` filesystem type is the universal disk format used to implement ISO/IEC 13346 and ECMA-167 specifications. This is an open vendor filesystem type for data storage on a broad range of media. This filesystem type is necessary to support writing DVDs and newer optical disc formats.

Removing support for unneeded filesystem types reduces the local attack surface of the system. If this filesystem type is not needed, disable it.

Solution

Edit or create the file `/etc/modprobe.d/CIS.conf` and add the following line:
“`
install udf /bin/true
“`
Run the following command to unload the `udf` module:
“`
# rmmod udf
“`

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/1863

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-7b.
• CSCv6|13

Source

• Tenable.com/audits