Guide to the Secure Configuration of Debian 11
Rules, Groups, and Values defined within the XCCDF Benchmark
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Ensure auditd Collects Information on the Use of Privileged Commands - poweroff
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - reboot
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - shutdown
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Record Attempts to Alter Time Through clock_settime
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record attempts to alter time through settimeofday
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record Attempts to Alter Time Through stime
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record Attempts to Alter the localtime File
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...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>. Add or modify the following line, substituting <i>...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. Edit the file <code>/etc/audit/auditd.conf</code>. A...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. Edit the file <code>/etc/audit/auditd.conf</code>. A...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 <code>/etc/audit/auditd.conf</code> to ensure tha...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 or modify the following line, substituting the co...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 taken by <code>auditd</code>, add or correct the lin...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 modify the following line, substituting <i>NUMLOGS</i>...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.conf</code>. Modify the following line, substitut...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_auditd_freq" use="legacy"></xccdf-1.2:sub> records, s...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 <code>log_format</code> to <code>ENRICHED</code> in <...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/auditd.conf</code>. Set <code>overflow_action</cod...Rule Medium Severity -
Enable auditd Service
The <code>auditd</code> service is an essential userspace component of the Linux Auditing System, as it is responsible for writing audit records to disk. The <code>auditd</code> service can be ena...Rule Medium Severity -
Configure auditd Rules for Comprehensive Auditing
The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section describes recommended configuration settings for comprehensive auditing, but a full description...Group -
Ensure auditd Collects Information on Exporting to Media (successful)
At a minimum, the audit system should collect media exportation events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read aud...Rule Medium Severity -
Record Events that Modify the System's Network Environment
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following lines to a file with suffix <co...Rule Medium Severity -
Record Events that Modify User/Group Information
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following lines to a file with suffix <co...Rule Medium Severity -
Audit Configuration Files Must Be Owned By Group root
All audit configuration files must be owned by group root.chown :root /etc/audit/audit*.{rules,conf} /etc/audit/rules.d/*Rule Medium Severity -
Audit Configuration Files Must Be Owned By Root
All audit configuration files must be owned by root user. To properly set the owner of <code>/etc/audit/</code>, run the command: <pre>$ sudo chown root /etc/audit/ </pre> To properly set the own...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls
At a minimum, the audit system should collect file permission changes for all users and root. Note that the "-F arch=b32" lines should be present even on a 64 bit system. These commands identify sy...Group -
Record Events that Modify the System's Discretionary Access Controls - chmod
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audi...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fchown
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audi...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fremovexattr
At a minimum, the audit system should collect file permission changes for all users and root. <br> <br> If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> pr...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - lremovexattr
At a minimum, the audit system should collect file permission changes for all users and root. <br> <br> If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> pr...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - umount2
At a minimum, the audit system should collect file system umount2 changes. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daem...Rule Medium Severity -
Ensure auditd Collects File Deletion Events by User - unlink
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - creat
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - open
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - openat
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Ensure auditd Collects Information on Kernel Module Loading and Unloading - finit_module
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following lines to a file with suffix <co...Rule Medium Severity -
Record Attempts to Alter Logon and Logout Events
The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during dae...Group -
Record Attempts to Alter Logon and Logout Events - tallylog
The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during dae...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands
The audit system should collect information about usage of privileged commands for all users. These are commands with suid or sgid bits on and they are specially risky in local block device partiti...Rule Medium Severity -
Record attempts to alter time through adjtimex
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...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 <code>active</code> line in <code>/etc/audit/plugins...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>. Add or modify the following line, substituting <i>...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. Edit the file <code>/etc/audit/auditd.conf</code>. A...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 taken by <code>auditd</code>, add or correct the lin...Rule Medium Severity
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