DISA STIG for Oracle Linux 8
Rules and Groups employed by this XCCDF Profile
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Configure Time Service Maxpoll Interval
The <code>maxpoll</code> should be configured to <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_time_service_set_maxpoll" use="legacy...Rule Medium Severity -
Ensure Chrony is only configured with the server directive
Check that Chrony only has time sources configured with theserver
directive.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 -
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-server Package
Thersh-server
package can be removed with the following command:$ sudo yum erase rsh-server
Rule High Severity -
Remove Host-Based Authentication Files
The <code>shosts.equiv</code> file lists remote hosts and users that are trusted by the local system. To remove these files, run the following comm...Rule High Severity -
Remove User Host-Based Authentication Files
The <code>~/.shosts</code> (in each user's home directory) files list remote hosts and users that are trusted by the local system. To remove these ...Rule High 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
Thetelnet-server
package can be removed with the following command:$ sudo yum erase telnet-server
Rule High Severity -
TFTP Server
TFTP is a lightweight version of the FTP protocol which has traditionally been used to configure networking equipment. However, TFTP provides littl...Group -
Uninstall tftp-server Package
Thetftp-server
package can be removed with the following command:$ sudo yum erase tftp-server
Rule High Severity -
Ensure tftp Daemon Uses Secure Mode
If running the Trivial File Transfer Protocol (TFTP) service is necessary, it should be configured to change its root directory at startup. To do s...Rule Medium Severity -
Hardware RNG Entropy Gatherer Daemon
The rngd feeds random data from hardware device to kernel random device.Group -
Enable the Hardware RNG Entropy Gatherer Service
The Hardware RNG Entropy Gatherer service should be enabled. The <code>rngd</code> service can be enabled with the following command: <pre>$ sudo ...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 -
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 -
Enable the OpenSSH Service
The SSH server service, sshd, is commonly needed. The <code>sshd</code> service can be enabled with the following command: <pre>$ sudo systemctl e...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 -
OpenSSH Service Must Use Passcode for Their Private Keys
Verify the SSH private key files have a passcode. For each private key stored on the system, use the following command: <pre>$ sudo ssh-keygen -y ...Rule Medium Severity
Node 2
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