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1.1.12 Ensure /var/tmp partition includes the noexec option

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Information

The noexec mount option specifies that the filesystem cannot contain executable binaries.

Since the /var/tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot run executable binaries from /var/tmp.

Solution

For existing /var/tmp partitions, edit the /etc/fstab file and add noexec 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,noexec /var/tmp

See Also

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

Item Details

References: CSCv7|2.6

Plugin: Unix

Control ID: 43cab48350da3abd8f923ae5c3dd6963041ba9fc320d8c25397c7e3f5b91cb00