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Standard System Security Profile for Red Hat Enterprise Linux 7

Rules and Groups employed by this XCCDF Profile

  • Record Information on the Use of Privileged Commands

    At a minimum, the audit system should collect the execution of privileged commands for all users and root.
    Group
  • Ensure auditd Collects Information on the Use of Privileged Commands

    The audit system should collect information about usage of privileged commands for all users. These are commands with suid or sgid bits on and they are specially risky in local block device partiti...
    Rule Medium Severity
  • Records Events that Modify Date and Time Information

    Arbitrary changes to the system time can be used to obfuscate nefarious activities in log files, as well as to confuse network services that are highly dependent upon an accurate system time. All c...
    Group
  • Record attempts to alter time through adjtimex

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...
    Rule Medium Severity
  • Record Attempts to Alter Time Through clock_settime

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...
    Rule Medium Severity
  • Record attempts to alter time through settimeofday

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...
    Rule Medium Severity
  • Record Attempts to Alter Time Through stime

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...
    Rule Medium Severity
  • Record Attempts to Alter the localtime File

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...
    Rule Medium Severity
  • GRUB2 bootloader configuration

    During the boot process, the boot loader is responsible for starting the execution of the kernel and passing options to it. The boot loader allows for the selection of different kernels - possibly ...
    Group
  • Non-UEFI GRUB2 bootloader configuration

    Non-UEFI GRUB2 bootloader configuration
    Group
  • Verify /boot/grub2/grub.cfg Group Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be group-owned by the <code>root</code> group to prevent destruction or modification of the file. To properly set the group owner of <code>/boot/g...
    Rule Medium Severity
  • Verify /boot/grub2/user.cfg Group Ownership

    The file <code>/boot/grub2/user.cfg</code> should be group-owned by the <code>root</code> group to prevent reading or modification of the file. To properly set the group owner of <code>/boot/grub2...
    Rule Medium Severity
  • Verify /boot/grub2/grub.cfg User Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be owned by the <code>root</code> user to prevent destruction or modification of the file. To properly set the owner of <code>/boot/grub2/grub.cfg...
    Rule Medium Severity
  • Verify /boot/grub2/user.cfg User Ownership

    The file <code>/boot/grub2/user.cfg</code> should be owned by the <code>root</code> user to prevent reading or modification of the file. To properly set the owner of <code>/boot/grub2/user.cfg</co...
    Rule Medium Severity
  • Verify /boot/grub2/grub.cfg Permissions

    File permissions for <code>/boot/grub2/grub.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/grub.cfg</code>, run the command: <pre>$ sudo chmod 600 /boot/grub...
    Rule Medium Severity
  • Verify /boot/grub2/user.cfg Permissions

    File permissions for <code>/boot/grub2/user.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/user.cfg</code>, run the command: <pre>$ sudo chmod 600 /boot/grub...
    Rule Medium Severity
  • UEFI GRUB2 bootloader configuration

    UEFI GRUB2 bootloader configuration
    Group
  • Verify the UEFI Boot Loader grub.cfg Group Ownership

    The file <code>/boot/efi/EFI/redhat/grub.cfg</code> should be group-owned by the <code>root</code> group to prevent destruction or modification of the file. To properly set the group owner of <cod...
    Rule Medium Severity
  • Verify /boot/efi/EFI/redhat/user.cfg Group Ownership

    The file <code>/boot/efi/EFI/redhat/user.cfg</code> should be group-owned by the <code>root</code> group to prevent reading or modification of the file. To properly set the group owner of <code>/b...
    Rule Medium Severity
  • Verify the UEFI Boot Loader grub.cfg User Ownership

    The file <code>/boot/efi/EFI/redhat/grub.cfg</code> should be owned by the <code>root</code> user to prevent destruction or modification of the file. To properly set the owner of <code>/boot/efi/E...
    Rule Medium Severity
  • Verify /boot/efi/EFI/redhat/user.cfg User Ownership

    The file <code>/boot/efi/EFI/redhat/user.cfg</code> should be owned by the <code>root</code> user to prevent reading or modification of the file. To properly set the owner of <code>/boot/efi/EFI/r...
    Rule Medium Severity
  • Verify the UEFI Boot Loader grub.cfg Permissions

    File permissions for <code>/boot/efi/EFI/redhat/grub.cfg</code> should be set to 700. To properly set the permissions of <code>/boot/efi/EFI/redhat/grub.cfg</code>, run the command: <pre>$ sudo ch...
    Rule Medium Severity
  • Verify /boot/efi/EFI/redhat/user.cfg Permissions

    File permissions for <code>/boot/efi/EFI/redhat/user.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/efi/EFI/redhat/user.cfg</code>, run the command: <pre>$ sudo ch...
    Rule Medium Severity
  • Configure Syslog

    The syslog service has been the default Unix logging mechanism for many years. It has a number of downsides, including inconsistent log format, lack of authentication for received messages, and lac...
    Group
  • Ensure rsyslog is Installed

    Rsyslog is installed by default. The rsyslog package can be installed with the following command:
     $ sudo yum install rsyslog
    Rule Medium Severity
  • Enable rsyslog Service

    The <code>rsyslog</code> service provides syslog-style logging by default on Red Hat Enterprise Linux 7. The <code>rsyslog</code> service can be enabled with the following command: <pre>$ sudo sys...
    Rule Medium Severity
  • File Permissions and Masks

    Traditional Unix security relies heavily on file and directory permissions to prevent unauthorized users from reading or modifying files to which they should not have access. <br><br> Several of th...
    Group
  • 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 important permission restrictions which can be verifie...
    Group
  • Verify that All World-Writable Directories Have Sticky Bits Set

    When the so-called 'sticky bit' is set on a directory, only the owner of a given file may remove that file from the directory. Without the sticky bit, any user with write access to a directory may ...
    Rule Medium Severity
  • Ensure All SGID Executables Are Authorized

    The SGID (set group id) bit should be set only on files that were installed via authorized means. A straightforward means of identifying unauthorized SGID files is determine if any were not install...
    Rule Medium Severity
  • Ensure All SUID Executables Are Authorized

    The SUID (set user id) bit should be set only on files that were installed via authorized means. A straightforward means of identifying unauthorized SUID files is determine if any were not installe...
    Rule Medium Severity
  • Ensure No World-Writable Files Exist

    It is generally a good idea to remove global (other) write access to a file when it is discovered. However, check with documentation for specific applications before making changes. Also, monitor f...
    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>group</code>, and <code>gshadow</code> files must be ...
    Group
  • 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
  • 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 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 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 group File

    To properly set the permissions of /etc/group, run the command:
    $ sudo chmod 0644 /etc/group
    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
  • 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 in many environments, but this capability also ca...
    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 used to handle removable media, and the default c...
    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/fstab</code> configuration file, and can be used to m...
    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 devices should not exist within temporary directories li...
    Rule Medium Severity
  • Add nosuid Option to /dev/shm

    The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/dev/shm</code>. The SUID and SGID permissions should not be required in these world-writable dire...
    Rule Medium Severity
  • Services

    The best protection against vulnerable software is running less software. This section describes how to review the software which Red Hat Enterprise Linux 7 installs on a system and disable softwar...
    Group
  • Base Services

    This section addresses the base services that are installed on a Red Hat Enterprise Linux 7 default installation which are not covered in other sections. Some of these services listen on the networ...
    Group
  • Disable Automatic Bug Reporting Tool (abrtd)

    The Automatic Bug Reporting Tool (<code>abrtd</code>) daemon collects and reports crash data when an application crash is detected. Using a variety of plugins, abrtd can email crash reports to syst...
    Rule Medium Severity

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