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Unclassified Information in Non-federal Information Systems and Organizations (NIST 800-171)

Rules and Groups employed by this XCCDF Profile

  • Verify Permissions on Important Files and Directories

    Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses impo...
    Group
  • Enable Kernel Parameter to Enforce DAC on Hardlinks

    To set the runtime status of the <code>fs.protected_hardlinks</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.protecte...
    Rule Medium Severity
  • Enable Kernel Parameter to Enforce DAC on Symlinks

    To set the runtime status of the <code>fs.protected_symlinks</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.protected...
    Rule Medium Severity
  • Restrict Dynamic Mounting and Unmounting of Filesystems

    Linux includes a number of facilities for the automated addition and removal of filesystems on a running system. These facilities may be necessary...
    Group
  • Disable the Automounter

    The <code>autofs</code> daemon mounts and unmounts filesystems, such as user home directories shared via NFS, on demand. In addition, autofs can be...
    Rule Medium Severity
  • Disable Mounting of cramfs

    To configure the system to prevent the <code>cramfs</code> kernel module from being loaded, add the following line to the file <code>/etc/modprobe...
    Rule Low Severity
  • Disable Modprobe Loading of USB Storage Driver

    To prevent USB storage devices from being used, configure the kernel module loading system to prevent automatic loading of the USB storage driver. ...
    Rule Medium Severity
  • Restrict Partition Mount Options

    System partitions can be mounted with certain options that limit what files on those partitions can do. These options are set in the <code>/etc/fst...
    Group
  • Add nodev Option to /dev/shm

    The <code>nodev</code> mount option can be used to prevent creation of device files in <code>/dev/shm</code>. Legitimate character and block device...
    Rule Medium Severity
  • Add noexec Option to /dev/shm

    The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/dev/shm</code>. It can be dangerous to allow...
    Rule Medium Severity

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