Guide to the Secure Configuration of Oracle Linux 9
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable Avahi Publishing
To prevent Avahi from publishing its records, edit <code>/etc/avahi/avahi-daemon.conf</code> and ensure the following line appears in the <code>[pu...Rule Low Severity -
Disable Avahi Server if Possible
Because the Avahi daemon service keeps an open network port, it is subject to network attacks. Disabling it can reduce the system's vulnerability t...Group -
Disable Avahi Server Software
Theavahi-daemonservice can be disabled with the following command:$ sudo systemctl mask --now avahi-daemon.service
Rule Medium Severity -
Base Services
This section addresses the base services that are installed on a Oracle Linux 9 default installation which are not covered in other sections. Some ...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...Rule Medium Severity -
Disable KDump Kernel Crash Analyzer (kdump)
The <code>kdump</code> service provides a kernel crash dump analyzer. It uses the <code>kexec</code> system call to boot a secondary kernel ("captu...Rule Medium Severity -
Disable ntpdate Service (ntpdate)
The <code>ntpdate</code> service sets the local hardware clock by polling NTP servers when the system boots. It synchronizes to the NTP servers lis...Rule Low Severity -
Disable Odd Job Daemon (oddjobd)
The <code>oddjobd</code> service exists to provide an interface and access control mechanism through which specified privileged tasks can run tasks...Rule Medium Severity -
Disable Apache Qpid (qpidd)
The <code>qpidd</code> service provides high speed, secure, guaranteed delivery services. It is an implementation of the Advanced Message Queuing ...Rule Low Severity -
Disable Network Router Discovery Daemon (rdisc)
The <code>rdisc</code> service implements the client side of the ICMP Internet Router Discovery Protocol (IRDP), which allows discovery of routers ...Rule Medium Severity -
Cron and At Daemons
The cron and at services are used to allow commands to be executed at a later time. The cron service is required by almost all systems to perform n...Group -
Install the cron service
The Cron service should be installed.Rule Medium Severity -
Disable DHCP Client
DHCP is the default network configuration method provided by the system installer, and common on many networks. Nevertheless, manual management of ...Group -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary mainte...Rule Medium Severity -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary mainte...Rule Medium Severity -
Disable At Service (atd)
The <code>at</code> and <code>batch</code> commands can be used to schedule tasks that are meant to be executed only once. This allows delayed exec...Rule Medium Severity -
Verify Group Who Owns cron.d
To properly set the group owner of/etc/cron.d, run the command:$ sudo chgrp root /etc/cron.d
Rule Medium Severity -
Verify Group Who Owns cron.daily
To properly set the group owner of/etc/cron.daily, run the command:$ sudo chgrp root /etc/cron.daily
Rule Medium Severity -
Verify Group Who Owns cron.hourly
To properly set the group owner of/etc/cron.hourly, run the command:$ sudo chgrp root /etc/cron.hourly
Rule Medium Severity -
Verify Group Who Owns cron.monthly
To properly set the group owner of/etc/cron.monthly, run the command:$ sudo chgrp root /etc/cron.monthly
Rule Medium Severity
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