cyberstrikeus 2.20 Disable Mounting of jffs2 Filesystems (Not Scored)
Profile Applicability
- Level 2
Description
The jffs2 (journaling flash filesystem 2) filesystem type is a log-structured filesystem used in flash memory devices.
Rationale
Removing support for unneeded filesystem types reduces the local attack surface of the server. If this filesystem type is not needed, disable it.
Audit Procedure
Using Command Line
/sbin/modprobe -n -v jffs2
/sbin/lsmod | grep jffs2
Expected Result
The first command should output install /bin/true. The second command should produce no output (module not loaded).
Remediation
Using Command Line
Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
install jffs2 /bin/true
Default Value
By default, the jffs2 module is available for loading.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 2 - Not Scored