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.

Rationale:

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 a file in the /etc/modprobe.d/ directory ending in .conf
Example: /etc/modprobe.d/udf.conf
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/3152

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-11
• CSCv6|13
• CSCv7|2.6

Source

• Tenable.com/audits