How to fix NullPointerException

Owned by Nick Romanzo, created
Last updated: Aug 02, 2023 by Andrew Dannenberger
2 min read

Product Name

CIS-CAT Pro Assessor v4

Product Version

All

Date

May 3, 2023

Problem

I am unable to perform a Linux assessment. CIS-CAT crashes with a java NullPointerException, right after starting an assessment.

Exception in thread "main" java.lang.NullPointerException: Cannot invoke method tokenize() on null object

Solution

Eject/unmount any disks before you start. We most frequently see this occur if the host system has a physical or virtual CD/DVD mounted that includes spaces in the mount path (such as a VMWare Tools ISO, or an OS installation disc), or from unsupported special characters in file system paths (which may be valid for the filesystem itself, but can cause issues when parsed by CIS-CAT Pro Assessor).

The screenshot below shows that an ISO installation disk is still mounted on the target system using the /usr/bin/df -TP command:

Once itā€™s ejected, the scan will complete:

To check your mounted media, run /usr/bin/df -TP

Keywords; Ubuntu Linux VM NullPointerException

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