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Guide to the Secure Configuration of OpenEmbedded

Rules, Groups, and Values defined within the XCCDF Benchmark

  • A remote time server for Chrony is configured

    <code>Chrony</code> is a daemon which implements the Network Time Protocol (NTP). It is designed to synchronize system clocks across a variety of s...
    Rule Medium Severity
  • SSH Approved MACs by FIPS

    Specify the FIPS approved MACs (message authentication code) algorithms that are used for data integrity protection by the SSH server.
    Value
  • SSH session Idle time

    Specify duration of allowed idle time.
    Value
  • SSH Server Listening Port

    Specify port the SSH server is listening.
    Value
  • SSH Max authentication attempts

    Specify the maximum number of authentication attempts per connection.
    Value
  • SSH is required to be installed

    Specify if the Policy requires SSH to be installed. Used by SSH Rules to determine if SSH should be uninstalled or configured.<br> A value of 0 mea...
    Value
  • SSH Strong KEX by FIPS

    Specify the FIPS approved KEXs (Key Exchange Algorithms) algorithms that are used for methods in cryptography by which cryptographic keys are exch...
    Value
  • SSH Strong MACs by FIPS

    Specify the FIPS approved MACs (Message Authentication Code) algorithms that are used for data integrity protection by the SSH server.
    Value
  • SSH Max Sessions Count

    Specify the maximum number of open sessions permitted.
    Value
  • SSH Max Keep Alive Count

    Specify the maximum number of idle message counts before session is terminated.
    Value
  • Install the OpenSSH Server Package

    The <code>openssh-server</code> package should be installed. The <code>openssh-server</code> package can be installed with the following command: <...
    Rule Medium Severity
  • Remove the OpenSSH Server Package

    The <code>openssh-server</code> package should be removed. The <code>openssh-server</code> package can be removed with the following command: <pre>...
    Rule Medium Severity
  • Disable SSH Server If Possible

    The SSH server service, sshd, is commonly needed. However, if it can be disabled, do so. This is unusual, as SSH is a common method for encrypted ...
    Rule High Severity
  • Verify Group Who Owns SSH Server config file

    To properly set the group owner of /etc/ssh/sshd_config, run the command:
    $ sudo chgrp root /etc/ssh/sshd_config
    Rule Medium Severity
  • Verify Group Ownership on SSH Server Private *_key Key Files

    SSH server private keys, files that match the /etc/ssh/*_key glob, must be group-owned by root group.
    Rule Medium Severity
  • Verify Group Ownership on SSH Server Public *.pub Key Files

    SSH server public keys, files that match the /etc/ssh/*.pub glob, must be group-owned by root group.
    Rule Medium Severity
  • Verify Owner on SSH Server config file

    To properly set the owner of /etc/ssh/sshd_config, run the command:
    $ sudo chown root /etc/ssh/sshd_config 
    Rule Medium Severity
  • Verify Ownership on SSH Server Private *_key Key Files

    SSH server private keys, files that match the /etc/ssh/*_key glob, must be owned by root user.
    Rule Medium Severity
  • Verify Ownership on SSH Server Public *.pub Key Files

    SSH server public keys, files that match the /etc/ssh/*.pub glob, must be owned by root user.
    Rule Medium Severity
  • Verify Permissions on SSH Server config file

    To properly set the permissions of /etc/ssh/sshd_config, run the command:
    $ sudo chmod 0600 /etc/ssh/sshd_config
    Rule Medium Severity
  • Verify Permissions on SSH Server Private *_key Key Files

    SSH server private keys - files that match the <code>/etc/ssh/*_key</code> glob, have to have restricted permissions. If those files are owned by t...
    Rule Medium Severity
  • Verify Permissions on SSH Server Public *.pub Key Files

    To properly set the permissions of /etc/ssh/*.pub, run the command:
    $ sudo chmod 0644 /etc/ssh/*.pub
    Rule Medium Severity
  • Remove SSH Server iptables Firewall exception (Unusual)

    By default, inbound connections to SSH's port are allowed. If the SSH server is not being used, this exception should be removed from the firewall ...
    Rule Unknown Severity
  • Configure OpenSSH Client if Necessary

    The following configuration changes apply to the SSH client. They can improve security parameters relwevant to the client user, e.g. increasing ent...
    Group
  • Configure OpenSSH Server if Necessary

    If the system needs to act as an SSH server, then certain changes should be made to the OpenSSH daemon configuration file <code>/etc/ssh/sshd_confi...
    Group
  • SSH RekeyLimit - size

    Specify the size component of the rekey limit.
    Value
  • SSH RekeyLimit - size

    Specify the size component of the rekey limit.
    Value
  • SSH Compression Setting

    Specify the compression setting for SSH connections.
    Value
  • SSH Privilege Separation Setting

    Specify whether and how sshd separates privileges when handling incoming network connections.
    Value
  • SSH LoginGraceTime setting

    Configure parameters for how long the servers stays connected before the user has successfully logged in
    Value
  • SSH MaxStartups setting

    Configure parameters for maximum concurrent unauthenticated connections to the SSH daemon.
    Value
  • Ensure Rsyslog Encrypts Off-Loaded Audit Records

    Rsyslogd is a system utility providing support for message logging. Support for both internet and UNIX domain sockets enables this utility to suppo...
    Rule Medium Severity
  • Ensure Logrotate Runs Periodically

    The <code>logrotate</code> utility allows for the automatic rotation of log files. The frequency of rotation is specified in <code>/etc/logrotate....
    Rule Medium Severity
  • Configure rsyslogd to Accept Remote Messages If Acting as a Log Server

    By default, <code>rsyslog</code> does not listen over the network for log messages. If needed, modules can be enabled to allow the rsyslog daemon t...
    Group
  • Ensure syslog-ng is Installed

    syslog-ng can be installed in replacement of rsyslog. The <code>syslog-ng-core</code> package can be installed with the following command: <pre> $ ...
    Rule Medium Severity
  • Enable syslog-ng Service

    The <code>syslog-ng</code> service (in replacement of rsyslog) provides syslog-style logging by default on Debian. The <code>syslog-ng</code> serv...
    Rule Medium Severity
  • Enable rsyslog to Accept Messages via TCP, if Acting As Log Server

    The <code>rsyslog</code> daemon should not accept remote messages unless the system acts as a log server. If the system needs to act as a central l...
    Rule Unknown Severity
  • Enable rsyslog to Accept Messages via UDP, if Acting As Log Server

    The <code>rsyslog</code> daemon should not accept remote messages unless the system acts as a log server. If the system needs to act as a central l...
    Rule Unknown Severity
  • Verify Integrity with RPM

    The RPM package management system includes the ability to verify the integrity of installed packages by comparing the installed files with informat...
    Group
  • Verify Integrity with AIDE

    AIDE conducts integrity checks by comparing information about files with previously-gathered information. Ideally, the AIDE database is created imm...
    Group
  • Install AIDE

    The aide package can be installed with the following command:
    $ sudo dnf install aide
    Rule Medium Severity
  • Operating System Vendor Support and Certification

    The assurance of a vendor to provide operating system support and maintenance for their product is an important criterion to ensure product stabili...
    Group
  • Endpoint Protection Software

    Endpoint protection security software that is not provided or supported by Red Hat can be installed to provide complementary or duplicative secur...
    Group
  • Configure Backups of User Data

    The operating system must conduct backups of user data contained in the operating system. The operating system provides utilities for automating ba...
    Rule Medium Severity
  • McAfee Endpoint Security Software

    In DoD environments, McAfee Host-based Security System (HBSS) and VirusScan Enterprise for Linux (VSEL) is required to be installed on all systems.
    Group
  • The age of McAfee defintion file before requiring updating

    Specify the amount of time (in seconds) before McAfee definition files need to be updated.
    Value
  • McAfee Endpoint Security for Linux (ENSL)

    McAfee Endpoint Security for Linux (ENSL) is a suite of software applications used to monitor, detect, and defend computer networks and systems.
    Group
  • McAfee Host-Based Intrusion Detection Software (HBSS)

    McAfee Host-based Security System (HBSS) is a suite of software applications used to monitor, detect, and defend computer networks and systems.
    Group
  • Install the Host Intrusion Prevention System (HIPS) Module

    Install the McAfee Host Intrusion Prevention System (HIPS) Module if it is absolutely necessary. If SELinux is enabled, do not install or enable th...
    Rule Medium Severity
  • Configure GNOME Login Screen

    In the default GNOME desktop, the login is displayed after system boot and can display user accounts, allow users to reboot the system, and allow u...
    Group

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