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1.1.8 Ensure nosuid option set on /var/tmp partition

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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

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /var/tmp partition. 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://benchmarks.cisecurity.org/tools2/linux/CIS_Ubuntu_Linux_14.04_LTS_Benchmark_v2.0.0.pdf

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6

Plugin: Unix

Control ID: aea32a9fd8bb7f5d490735e5202797f7f4200579d02c23002a1e8f58617b9cf6