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Guide to the Secure Configuration of Red Hat Enterprise Linux 7

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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
  • Verify Permissions on Files with Local Account Information and Credentials

    The default restrictive permissions for files which act as important security databases such as <code>passwd</code>, <code>shadow</code>, <code>gro...
    Group
  • Verify Group Who Owns Backup group File

    To properly set the group owner of /etc/group-, run the command:
    $ sudo chgrp root /etc/group-
    Rule Medium Severity
  • Verify Group Who Owns Backup gshadow File

    To properly set the group owner of /etc/gshadow-, run the command:
    $ sudo chgrp root /etc/gshadow-
    Rule Medium Severity
  • Verify Group Who Owns Backup passwd File

    To properly set the group owner of /etc/passwd-, run the command:
    $ sudo chgrp root /etc/passwd-
    Rule Medium Severity
  • Verify User Who Owns Backup shadow File

    To properly set the group owner of /etc/shadow-, run the command:
    $ sudo chgrp root /etc/shadow-
    Rule Medium Severity
  • Verify Group Who Owns group File

    To properly set the group owner of /etc/group, run the command:
    $ sudo chgrp root /etc/group
    Rule Medium Severity
  • cobbler_use_nfs SELinux Boolean

    default - Default SELinux boolean setting.
    on - SELinux boolean is enabled.
    off - SELinux boolean is disabled.
    Value
  • Verify Group Who Owns passwd File

    To properly set the group owner of /etc/passwd, run the command:
    $ sudo chgrp root /etc/passwd
    Rule Medium Severity
  • Verify Group Who Owns shadow File

    To properly set the group owner of /etc/shadow, run the command:
    $ sudo chgrp root /etc/shadow
    Rule Medium Severity
  • Verify User Who Owns Backup group File

    To properly set the owner of /etc/group-, run the command:
    $ sudo chown root /etc/group- 
    Rule Medium Severity
  • Verify User Who Owns Backup gshadow File

    To properly set the owner of /etc/gshadow-, run the command:
    $ sudo chown root /etc/gshadow- 
    Rule Medium Severity
  • Verify User Who Owns Backup passwd File

    To properly set the owner of /etc/passwd-, run the command:
    $ sudo chown root /etc/passwd- 
    Rule Medium Severity
  • Verify Group Who Owns Backup shadow File

    To properly set the owner of /etc/shadow-, run the command:
    $ sudo chown root /etc/shadow- 
    Rule Medium Severity
  • Verify User Who Owns group File

    To properly set the owner of /etc/group, run the command:
    $ sudo chown root /etc/group 
    Rule Medium Severity
  • Verify User Who Owns gshadow File

    To properly set the owner of /etc/gshadow, run the command:
    $ sudo chown root /etc/gshadow 
    Rule Medium Severity
  • Verify User Who Owns passwd File

    To properly set the owner of /etc/passwd, run the command:
    $ sudo chown root /etc/passwd 
    Rule Medium Severity
  • Verify User Who Owns shadow File

    To properly set the owner of /etc/shadow, run the command:
    $ sudo chown root /etc/shadow 
    Rule Medium Severity
  • Verify Permissions on Backup group File

    To properly set the permissions of /etc/group-, run the command:
    $ sudo chmod 0644 /etc/group-
    Rule Medium Severity
  • Verify Permissions on Backup gshadow File

    To properly set the permissions of /etc/gshadow-, run the command:
    $ sudo chmod 0000 /etc/gshadow-
    Rule Medium Severity
  • Verify Permissions on Backup passwd File

    To properly set the permissions of /etc/passwd-, run the command:
    $ sudo chmod 0644 /etc/passwd-
    Rule Medium Severity
  • Verify Permissions on Backup shadow File

    To properly set the permissions of /etc/shadow-, run the command:
    $ sudo chmod 0000 /etc/shadow-
    Rule Medium Severity
  • Verify Permissions on passwd File

    To properly set the permissions of /etc/passwd, run the command:
    $ sudo chmod 0644 /etc/passwd
    Rule Medium Severity
  • Verify Permissions on shadow File

    To properly set the permissions of /etc/shadow, run the command:
    $ sudo chmod 0000 /etc/shadow
    Rule Medium Severity
  • Verify Permissions on Files within /var/log Directory

    The /var/log directory contains files with logs of error messages in the system and should only be accessed by authorized personnel.
    Group
  • Verify Group Who Owns /var/log Directory

    To properly set the group owner of /var/log, run the command:
    $ sudo chgrp root /var/log
    Rule Medium Severity
  • Verify Group Who Owns /var/log/messages File

    To properly set the group owner of /var/log/messages, run the command:
    $ sudo chgrp root /var/log/messages
    Rule Medium Severity
  • Verify Group Who Owns /var/log/syslog File

    To properly set the group owner of /var/log/syslog, run the command:
    $ sudo chgrp adm /var/log/syslog
    Rule Medium Severity
  • Verify User Who Owns /var/log Directory

    To properly set the owner of /var/log, run the command:
    $ sudo chown root /var/log 
    Rule Medium Severity
  • Verify User Who Owns /var/log/messages File

    To properly set the owner of /var/log/messages, run the command:
    $ sudo chown root /var/log/messages 
    Rule Medium Severity
  • Verify User Who Owns /var/log/syslog File

    To properly set the owner of /var/log/syslog, run the command:
    $ sudo chown syslog /var/log/syslog 
    Rule Medium Severity
  • Verify Permissions on /var/log Directory

    To properly set the permissions of /var/log, run the command:
    $ sudo chmod 0755 /var/log
    Rule Medium Severity
  • Verify Permissions on /var/log/messages File

    To properly set the permissions of /var/log/messages, run the command:
    $ sudo chmod 0640 /var/log/messages
    Rule Medium Severity
  • Verify Permissions on /var/log/syslog File

    To properly set the permissions of /var/log/syslog, run the command:
    $ sudo chmod 0640 /var/log/syslog
    Rule Medium Severity
  • Verify File Permissions Within Some Important Directories

    Some directories contain files whose confidentiality or integrity is notably important and may also be susceptible to misconfiguration over time, p...
    Group
  • Verify that System Executable Have Root Ownership

    <pre>/bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin</pre> All these directories should be owned by the <code>root</code> user. If any...
    Rule Medium Severity
  • Disable Mounting of freevxfs

    To configure the system to prevent the <code>freevxfs</code> kernel module from being loaded, add the following line to the file <code>/etc/modpro...
    Rule Low Severity
  • Verify that Shared Library Directories Have Root Ownership

    System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by ...
    Rule Medium Severity
  • Verify that System Executable Directories Have Restrictive Permissions

    System executables are stored in the following directories by default: <pre>/bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin</pre> Thes...
    Rule Medium Severity
  • Verify that Shared Library Directories Have Restrictive Permissions

    System-wide shared library directories, which contain are linked to executables during process load time or run time, are stored in the following d...
    Rule Medium Severity
  • Verify that System Executables Have Root Ownership

    System executables are stored in the following directories by default: <pre>/bin /sbin /usr/bin /usr/libexec /usr/local/bin /usr/local/sbin /usr/sb...
    Rule Medium Severity
  • Verify that Shared Library Files Have Root Ownership

    System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by ...
    Rule Medium Severity
  • Verify that System Executables Have Restrictive Permissions

    System executables are stored in the following directories by default: <pre>/bin /sbin /usr/bin /usr/libexec /usr/local/bin /usr/local/sbin /usr/sb...
    Rule Medium Severity
  • Verify that Shared Library Files Have Restrictive Permissions

    System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by ...
    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
  • Assign Password to Prevent Changes to Boot Firmware Configuration

    Assign a password to the system boot firmware (historically called BIOS on PC systems) to require a password for any configuration changes.
    Rule Unknown Severity
  • Disable Booting from USB Devices in Boot Firmware

    Configure the system boot firmware (historically called BIOS on PC systems) to disallow booting from USB drives.
    Rule Unknown Severity
  • Disable Kernel Support for USB via Bootloader Configuration

    All USB support can be disabled by adding the <code>nousb</code> argument to the kernel's boot loader configuration. To do so, append "nousb" to th...
    Rule Unknown 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

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