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CIS SUSE Linux Enterprise 12 Benchmark for Level 1 - Workstation

Rules and Groups employed by this XCCDF Profile

  • Uninstall rpcbind Package

    The rpcbind utility maps RPC services to the ports on which they listen. RPC processes notify rpcbind when they start, registering the ports they a...
    Rule Low Severity
  • Disable rpcbind Service

    The rpcbind utility maps RPC services to the ports on which they listen. RPC processes notify rpcbind when they start, registering the ports they a...
    Rule Low Severity
  • Configure NFS Clients

    The steps in this section are appropriate for systems which operate as NFS clients.
    Group
  • Disable NFS Server Daemons

    There is no need to run the NFS server daemons <code>nfs</code> and <code>rpcsvcgssd</code> except on a small number of properly secured systems de...
    Group
  • Disable Network File System (nfs)

    The Network File System (NFS) service allows remote hosts to mount and interact with shared filesystems on the local system. If the local system is...
    Rule Unknown Severity
  • Network Time Protocol

    The Network Time Protocol is used to manage the system clock over a network. Computer clocks are not very accurate, so time will drift unpredictabl...
    Group
  • The Chrony package is installed

    System time should be synchronized between all systems in an environment. This is typically done by establishing an authoritative time server or se...
    Rule Medium Severity
  • Chrony Configure Pool and Server

    <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
  • Ensure that chronyd is running under chrony user account

    chrony is a daemon which implements the Network Time Protocol (NTP). It is designed to synchronize system clocks across a variety of systems and us...
    Rule Medium Severity
  • Obsolete Services

    This section discusses a number of network-visible services which have historically caused problems for system security, and for which disabling or...
    Group
  • Uninstall rsync Package

    The rsyncd service can be used to synchronize files between systems over network links. The <code>rsync</code> package can be removed with the foll...
    Rule Medium Severity
  • Ensure rsyncd service is disabled

    The rsyncd service can be disabled with the following command:
    $ sudo systemctl mask --now rsyncd.service
    Rule Medium Severity
  • Xinetd

    The <code>xinetd</code> service acts as a dedicated listener for some network services (mostly, obsolete ones) and can be used to provide access co...
    Group
  • Uninstall tcpd Package

    The tcpd package can be removed with the following command:
    $ sudo zypper remove tcpd
    Rule Low Severity
  • Uninstall xinetd Package

    The xinetd package can be removed with the following command:
    $ sudo zypper remove xinetd
    Rule Low Severity
  • Disable xinetd Service

    The xinetd service can be disabled with the following command:
    $ sudo systemctl mask --now xinetd.service
    Rule Medium Severity
  • NIS

    The Network Information Service (NIS), also known as 'Yellow Pages' (YP), and its successor NIS+ have been made obsolete by Kerberos, LDAP, and oth...
    Group
  • Remove NIS Client

    The Network Information Service (NIS), formerly known as Yellow Pages, is a client-server directory service protocol used to distribute system conf...
    Rule Unknown Severity
  • Uninstall ypserv Package

    The ypserv package can be removed with the following command:
    $ sudo zypper remove ypserv
    Rule High Severity
  • Rlogin, Rsh, and Rexec

    The Berkeley r-commands are legacy services which allow cleartext remote access and have an insecure trust model.
    Group
  • Uninstall rsh Package

    The rsh package contains the client commands for the rsh services
    Rule Unknown Severity
  • Chat/Messaging Services

    The talk software makes it possible for users to send and receive messages across systems through a terminal session.
    Group
  • Uninstall talk Package

    The <code>talk</code> package contains the client program for the Internet talk protocol, which allows the user to chat with other users on differe...
    Rule Medium Severity
  • Telnet

    The telnet protocol does not provide confidentiality or integrity for information transmitted on the network. This includes authentication informat...
    Group
  • Uninstall telnet-server Package

    The telnet-server package can be removed with the following command:
    $ sudo zypper remove telnet-server
    Rule High Severity
  • Remove telnet Clients

    The telnet client allows users to start connections to other systems via the telnet protocol.
    Rule Low Severity
  • Proxy Server

    A proxy server is a very desirable target for a potential adversary because much (or all) sensitive data for a given infrastructure may flow throug...
    Group
  • Disable Squid if Possible

    If Squid was installed and activated, but the system does not need to act as a proxy server, then it should be disabled and removed.
    Group
  • Uninstall squid Package

    The squid package can be removed with the following command:
     $ sudo zypper remove squid
    Rule Unknown Severity
  • Disable Squid

    The squid service can be disabled with the following command:
    $ sudo systemctl mask --now squid.service
    Rule Unknown Severity
  • Samba(SMB) Microsoft Windows File Sharing Server

    When properly configured, the Samba service allows Linux systems to provide file and print sharing to Microsoft Windows systems. There are two soft...
    Group
  • Disable Samba if Possible

    Even after the Samba server package has been installed, it will remain disabled. Do not enable this service unless it is absolutely necessary to pr...
    Group
  • Uninstall Samba Package

    The samba package can be removed with the following command:
     $ sudo zypper remove samba
    Rule Unknown Severity
  • Disable Samba

    The smb service can be disabled with the following command:
    $ sudo systemctl mask --now smb.service
    Rule Low Severity
  • SNMP Server

    The Simple Network Management Protocol allows administrators to monitor the state of network devices, including computers. Older versions of SNMP w...
    Group
  • Disable SNMP Server if Possible

    The system includes an SNMP daemon that allows for its remote monitoring, though it not installed by default. If it was installed and activated but...
    Group
  • Uninstall net-snmp Package

    The <code>net-snmp</code> package provides the snmpd service. The <code>net-snmp</code> package can be removed with the following command: <pre> $...
    Rule Unknown Severity
  • Disable snmpd Service

    The snmpd service can be disabled with the following command:
    $ sudo systemctl mask --now snmpd.service
    Rule Low Severity
  • SSH Server

    The SSH protocol is recommended for remote login and remote file transfer. SSH provides confidentiality and integrity for data exchanged between tw...
    Group
  • 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 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 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
  • 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
  • Set SSH Client Alive Count Max

    The SSH server sends at most <code>ClientAliveCountMax</code> messages during a SSH session and waits for a response from the SSH client. The optio...
    Rule Medium Severity
  • Set SSH Client Alive Interval

    SSH allows administrators to set a network responsiveness timeout interval. After this interval has passed, the unresponsive client will be automat...
    Rule Medium Severity
  • Disable Host-Based Authentication

    SSH's cryptographic host-based authentication is more secure than <code>.rhosts</code> authentication. However, it is not recommended that hosts un...
    Rule Medium Severity
  • Disable SSH Access via Empty Passwords

    Disallow SSH login with empty passwords. The default SSH configuration disables logins with empty passwords. The appropriate configuration is used ...
    Rule High Severity
  • Disable SSH Support for .rhosts Files

    SSH can emulate the behavior of the obsolete rsh command in allowing users to enable insecure access to their accounts via <code>.rhosts</code> fil...
    Rule Medium Severity

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