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1.1.14 Ensure /var/tmp partition includes the nosuid option

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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

For existing /var/tmp partitions, edit the /etc/fstab file and add nosuid to the fourth field (mounting options) of the /var/tmp entry. See the fstab(5) manual page for more information.

Run the following command to remount /var/tmp :

# mount -o remount,nosuid /var/tmp

See Also

https://workbench.cisecurity.org/benchmarks/8415

Item Details

References: CSCv7|5.1, CSCv7|13

Plugin: Unix

Control ID: 668d6c786422acf9c336fb50b21fcc060ad2e3e2c47d70a2e274cda28e284448