nodev mount option is not enabled for /var/tmp directory
Description
Mounting is the attaching of an additional block devices to the currently accessible filesystem of a computer. The /var/tmp directory is a world-writable directory used for temporary storage by all users and some applications. This directory is not meant for mounting block devices. Since, /var/tmp directory is world-writable, devices that are mounted on this directory can be accessed by all users.Therefore, it is advisable to enable nodev mount option for /var/tmp directory to prevent block devices from mounting on /var/tmp.
Severity
important
Category
Linux - Mounting Options Security
Resolution
Follow the below steps to resolve the misconfiguration.
Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /var/tmp partition.
Run the following command to remount /var/tmp :
mount -o remount,nodev /var/tmp
Potential issues that may arise after applying the resolution
Altering the existing security setting may create the following impact in your network operations.
Does remediation require reboot?
No
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