Detections
Analytics

1.1.2.5.3 Ensure nosuid option set on /var/tmp partition

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

View Next Audit Version

Information

The nosuid mount option specifies that the filesystem cannot contain setuid files.

Since the /var/tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot create setuid files in /var/tmp.

Solution

- IF - a separate partition exists for /var/tmp.

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /var/tmp partition.

Example:

 <device> /var/tmp <fstype> defaults,rw,nosuid,nodev,noexec,relatime 0 0

Run the following command to remount /var/tmp with the configured options:

 # mount -o remount /var/tmp

See Also

https://workbench.cisecurity.org/benchmarks/18959

Item Details

References: CSCv7|14.6

Plugin: Unix

Control ID: 428401c29376814707253aa3b3ff7b4aec39f48e49c96d86fa2fbb5e5837e86b