Guide to the Secure Configuration of Oracle Linux 9
Rules, Groups, and Values defined within the XCCDF Benchmark
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Maximum audit log file size for auditd
The setting for max_log_file in /etc/audit/auditd.confValue -
Action for auditd to take when disk space just starts to run low
The setting for space_left_action in /etc/audit/auditd.confValue -
The percentage remaining in disk space before prompting space_left_action
The setting for space_left as a percentage in /etc/audit/auditd.confValue -
Configure a Sufficiently Large Partition for Audit Logs
The Oracle Linux 9 operating system must allocate audit record storage capacity to store at least one weeks worth of audit records when audit recor...Rule Medium Severity -
Configure auditd to use audispd's syslog plugin
To configure the <code>auditd</code> service to use the <code>syslog</code> plug-in of the <code>audispd</code> audit event multiplexor, set the <c...Rule Medium Severity -
Configure auditd Disk Error Action on Disk Error
The <code>auditd</code> service can be configured to take an action when there is a disk error. Edit the file <code>/etc/audit/auditd.conf</code>. ...Rule Medium Severity -
Configure auditd Disk Error Action on Disk Error
The <code>auditd</code> service can be configured to take an action when there is a disk error. Edit the file <code>/etc/audit/auditd.conf</code>. ...Rule Medium Severity -
Configure auditd Disk Full Action when Disk Space Is Full
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Configure auditd Disk Full Action when Disk Space Is Full
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Configure auditd mail_acct Action on Low Disk Space
The <code>auditd</code> service can be configured to send email to a designated account in certain situations. Add or correct the following line in...Rule Medium Severity -
Configure auditd admin_space_left Action on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Configure auditd admin_space_left on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Configure auditd flush priority
The <code>auditd</code> service can be configured to synchronously write audit event data to disk. Add or correct the following line in <code>/etc/...Rule Medium Severity -
Configure auditd Max Log File Size
Determine the amount of audit data (in megabytes) which should be retained in each log file. Edit the file <code>/etc/audit/auditd.conf</code>. Add...Rule Medium Severity -
Configure auditd max_log_file_action Upon Reaching Maximum Log Size
The default action to take when the logs reach their maximum size is to rotate the log files, discarding the oldest one. To configure the action ta...Rule Medium Severity -
Configure auditd max_log_file_action Upon Reaching Maximum Log Size
The default action to take when the logs reach their maximum size is to rotate the log files, discarding the oldest one. To configure the action ta...Rule Medium Severity -
Configure auditd Number of Logs Retained
Determine how many log files <code>auditd</code> should retain when it rotates logs. Edit the file <code>/etc/audit/auditd.conf</code>. Add or modi...Rule Medium Severity -
Configure auditd space_left Action on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space <i>starts</i> to run low. Edit the file <code>/etc/audit/auditd...Rule Medium Severity -
Configure auditd space_left on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Set number of records to cause an explicit flush to audit logs
To configure Audit daemon to issue an explicit flush to disk command after writing <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_aud...Rule Medium Severity -
Include Local Events in Audit Logs
To configure Audit daemon to include local events in Audit logs, set <code>local_events</code> to <code>yes</code> in <code>/etc/audit/auditd.conf<...Rule Medium Severity -
Resolve information before writing to audit logs
To configure Audit daemon to resolve all uid, gid, syscall, architecture, and socket address information before writing the events to disk, set <co...Rule Low Severity -
Appropriate Action Must be Setup When the Internal Audit Event Queue is Full
The audit system should have an action setup in the event the internal event queue becomes full. To setup an overflow action edit <code>/etc/audit/...Rule Medium Severity -
Write Audit Logs to the Disk
To configure Audit daemon to write Audit logs to the disk, set <code>write_logs</code> to <code>yes</code> in <code>/etc/audit/auditd.conf</code>. ...Rule Medium Severity -
System Accounting with auditd
The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section makes use of recommended configuration settin...Group -
Configure auditing of unsuccessful file accesses
Ensure that unsuccessful attempts to access a file are audited. The following rules configure audit as described above: <pre>## Unsuccessful file ...Rule Medium Severity -
Configure auditing of successful file accesses
Ensure that successful attempts to access a file are audited. The following rules configure audit as described above: <pre>## Successful file acce...Rule Medium Severity -
Configure basic parameters of Audit system
Perform basic configuration of Audit system. Make sure that any previously defined rules are cleared, the auditing system is configured to handle s...Rule Medium Severity -
Configure auditing of unsuccessful file creations
Ensure that unsuccessful attempts to create a file are audited. The following rules configure audit as described above: <pre>## Unsuccessful file ...Rule Medium Severity -
Configure auditing of successful file creations
Ensure that successful attempts to create a file are audited. The following rules configure audit as described above: <pre>## Successful file crea...Rule Medium Severity -
Configure auditing of unsuccessful file deletions
Ensure that unsuccessful attempts to delete a file are audited. The following rules configure audit as described above: <pre>## Unsuccessful file ...Rule Medium Severity -
Configure auditing of successful file deletions
Ensure that successful attempts to delete a file are audited. The following rules configure audit as described above: <pre>## Successful file dele...Rule Medium Severity -
Configure immutable Audit login UIDs
Configure kernel to prevent modification of login UIDs once they are set. Changing login UIDs while this configuration is enforced requires special...Rule Medium Severity -
Configure auditing of unsuccessful file modifications
Ensure that unsuccessful attempts to modify a file are audited. The following rules configure audit as described above: <pre>## Unsuccessful file ...Rule Medium Severity -
Configure auditing of successful file modifications
Ensure that successful attempts to modify a file are audited. The following rules configure audit as described above: <pre>## Successful file modi...Rule Medium Severity -
Configure auditing of loading and unloading of kernel modules
Ensure that loading and unloading of kernel modules is audited. The following rules configure audit as described above: <pre>## These rules watch ...Rule Medium Severity -
Configure auditing of unsuccessful ownership changes
Ensure that unsuccessful attempts to change an ownership of files or directories are audited. The following rules configure audit as described abo...Rule Medium Severity -
Configure auditing of successful ownership changes
Ensure that successful attempts to change an ownership of files or directories are audited. The following rules configure audit as described above...Rule Medium Severity -
Configure auditing of unsuccessful permission changes
Ensure that unsuccessful attempts to change file or directory permissions are audited. The following rules configure audit as described above: <pr...Rule Medium Severity -
Configure auditing of successful permission changes
Ensure that successful attempts to modify permissions of files or directories are audited. The following rules configure audit as described above:...Rule Medium Severity -
AppArmor
Many security vulnerabilities result from bugs in trusted programs. A trusted program runs with privileges that attackers want to possess. The prog...Group -
AppArmor profiles mode
enforce - Set all AppArmor profiles to enforce mode
complain - Set all AppArmor profiles to complain modeValue -
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 ...Group -
L1TF vulnerability mitigation
Defines the L1TF vulneratility mitigations to employ.Value -
MDS vulnerability mitigation
Defines the MDS vulneratility mitigation to employ.Value -
Confidence level on Hardware Random Number Generator
Defines the level of trust on the hardware random number generators available in the system and the percentage of entropy to credit.Value -
Spec Store Bypass Mitigation
This controls how the Speculative Store Bypass (SSB) vulnerability is mitigated.Value -
Disable Recovery Booting
Oracle Linux 9 systems support an "recovery boot" option that can be used to prevent services from being started. The <code>GRUB_DISABLE_RECOVERY</...Rule Medium Severity -
IOMMU configuration directive
On x86 architecture supporting VT-d, the IOMMU manages the access control policy between the hardware devices and some of the system critical u...Rule Unknown Severity -
Configure kernel to zero out memory before allocation
To configure the kernel to zero out memory before allocating it, add the <code>init_on_alloc=1</code> argument to the default GRUB 2 command line. ...Rule Medium Severity
Node 2
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