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DRAFT - Protection Profile for General Purpose Operating Systems

Rules and Groups employed by this XCCDF Profile

  • 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
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  • Include Local Events in Audit Logs

    To configure Audit daemon to include local events in Audit logs, set local_events to yes in /etc/audit/auditd.conf. This is the default setting.
    Rule Medium Severity
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  • 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
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  • Set type of computer node name logging in audit logs

    To configure Audit daemon to use a unique identifier as computer node name in the audit events, set <code>name_format</code> to <code><xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_au...
    Rule Medium Severity
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  • Write Audit Logs to the Disk

    To configure Audit daemon to write Audit logs to the disk, set write_logs to yes in /etc/audit/auditd.conf. This is the default setting.
    Rule Medium Severity
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  • System Accounting with auditd

    The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section makes use of recommended configuration settings for specific policies or use cases. The rules i...
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  • 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 access (any other opens) This has to go last. -a a...
    Rule Medium Severity
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  • 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 access (any other opens) This has to go last. ## These...
    Rule Medium Severity
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  • 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 sudden bursts of events, and in cases of failure, m...
    Rule Medium Severity
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  • 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 creation (open with O_CREAT) -a always,exit -F arc...
    Rule Medium Severity
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  • 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 creation (open with O_CREAT) -a always,exit -F arch=b3...
    Rule Medium Severity
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  • 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 delete -a always,exit -F arch=b32 -S unlink,unlink...
    Rule Medium Severity
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  • 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 delete -a always,exit -F arch=b32 -S unlink,unlinkat,r...
    Rule Medium Severity
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  • 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 capabilities which are not available to unprivile...
    Rule Medium Severity
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  • 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 modifications (open for write or truncate) -a alwa...
    Rule Medium Severity
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  • 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 modifications (open for write or truncate) -a always,e...
    Rule Medium Severity
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  • 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 for kernel module insertion. By monitoring ## the ...
    Rule Medium Severity
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  • Perform general configuration of Audit for OSPP

    Configure some basic <code>Audit</code> parameters specific for OSPP profile. In particular, configure <code>Audit</code> to watch for direct modification of files storing system user and group inf...
    Rule Medium Severity
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  • 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 above: <pre>## Unsuccessful ownership change -a alway...
    Rule Medium Severity
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  • 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: <pre>## Successful ownership change -a always,ex...
    Rule Medium Severity
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  • 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: <pre>## Unsuccessful permission change -a always,exit...
    Rule Medium Severity
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  • 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: <pre>## Successful permission change -a always,ex...
    Rule Medium Severity
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  • 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 for the selection of different kernels - possibly ...
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  • Configure kernel to trust the CPU random number generator

    There exist two ways how to ensure that the Linux kernel trusts the CPU hardware random number generator. If the option is configured during kernel compilation, e.g. the option <code>CONFIG_RANDOM_...
    Rule Medium Severity
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  • Enable Kernel Page-Table Isolation (KPTI)

    To enable Kernel page-table isolation, add the argument <code>pti=on</code> to the default GRUB 2 command line for the Linux operating system. To ensure that <code>pti=on</code> is added as a kerne...
    Rule Low Severity
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  • Disable vsyscalls

    To disable use of virtual syscalls, add the argument <code>vsyscall=none</code> to the default GRUB 2 command line for the Linux operating system. To ensure that <code>vsyscall=none</code> is added...
    Rule Medium Severity
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  • UEFI GRUB2 bootloader configuration

    UEFI GRUB2 bootloader configuration
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  • Set the UEFI Boot Loader Password

    The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br> <br> Since plaintext passwords are a security risk, generate a hash...
    Rule High Severity
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  • Configure Syslog

    The syslog service has been the default Unix logging mechanism for many years. It has a number of downsides, including inconsistent log format, lack of authentication for received messages, and lac...
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  • Ensure rsyslog-gnutls is installed

    TLS protocol support for rsyslog is installed. The rsyslog-gnutls package can be installed with the following command: 
    $ sudo yum install rsyslog-gnutls
    Rule Medium Severity
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  • Ensure rsyslog is Installed

    Rsyslog is installed by default. The rsyslog package can be installed with the following command: 
     $ sudo yum install rsyslog
    Rule Medium Severity
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  • Rsyslog Logs Sent To Remote Host

    If system logs are to be useful in detecting malicious activities, it is necessary to send logs to a remote server. An intruder who has compromised the root account on a system may delete the log e...
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  • Configure TLS for rsyslog remote logging

    Configure <code>rsyslog</code> to use Transport Layer Security (TLS) support for logging to remote server for the Forwarding Output Module in <code>/etc/rsyslog.conf</code> using action. You can us...
    Rule Medium Severity
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  • Configure CA certificate for rsyslog remote logging

    Configure CA certificate for <code>rsyslog</code> logging to remote server using Transport Layer Security (TLS) using correct path for the <code>DefaultNetstreamDriverCAFile</code> global option in...
    Rule Medium Severity
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  • Network Configuration and Firewalls

    Most systems must be connected to a network of some sort, and this brings with it the substantial risk of network attack. This section discusses the security impact of decisions about networking wh...
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  • firewalld

    The dynamic firewall daemon <code>firewalld</code> provides a dynamically managed firewall with support for network “zones” to assign a level of trust to a network and its associated connections an...
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  • Inspect and Activate Default firewalld Rules

    Firewalls can be used to separate networks into different zones based on the level of trust the user has decided to place on the devices and traffic within that network. <code>NetworkManager</code>...
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  • Install firewalld Package

    The firewalld package can be installed with the following command: 
    $ sudo yum install firewalld
    Rule Medium Severity
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  • Verify firewalld Enabled

    The firewalld service can be enabled with the following command: 
    $ sudo systemctl enable firewalld.service
    Rule Medium Severity
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  • IPv6

    The system includes support for Internet Protocol version 6. A major and often-mentioned improvement over IPv4 is its enormous increase in the number of available addresses. Another important featu...
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  • Configure IPv6 Settings if Necessary

    A major feature of IPv6 is the extent to which systems implementing it can automatically configure their networking devices using information from the network. From a security perspective, manually...
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  • Configure Accepting Router Advertisements on All IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_ra</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.all.accept_ra=0</pre> To make sure that th...
    Rule Medium Severity
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  • Disable Accepting ICMP Redirects for All IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_redirects</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.all.accept_redirects=0</pre> To mak...
    Rule Medium Severity
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  • Disable Kernel Parameter for Accepting Source-Routed Packets on all IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_source_route</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.all.accept_source_route=0</pre> ...
    Rule Medium Severity
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  • Disable Accepting Router Advertisements on all IPv6 Interfaces by Default

    To set the runtime status of the <code>net.ipv6.conf.default.accept_ra</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.accept_ra=0</pre> To make sure...
    Rule Medium Severity
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  • Disable Kernel Parameter for Accepting ICMP Redirects by Default on IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.default.accept_redirects</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.accept_redirects=0</pre...
    Rule Medium Severity
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  • Disable Kernel Parameter for Accepting Source-Routed Packets on IPv6 Interfaces by Default

    To set the runtime status of the <code>net.ipv6.conf.default.accept_source_route</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.accept_source_route=...
    Rule Medium Severity
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  • Kernel Parameters Which Affect Networking

    The sysctl utility is used to set parameters which affect the operation of the Linux kernel. Kernel parameters which affect networking and have security implications are described here.
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  • Network Related Kernel Runtime Parameters for Hosts and Routers

    Certain kernel parameters should be set for systems which are acting as either hosts or routers to improve the system's ability defend against certain types of IPv4 protocol attacks.
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  • Disable Accepting ICMP Redirects for All IPv4 Interfaces

    To set the runtime status of the <code>net.ipv4.conf.all.accept_redirects</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv4.conf.all.accept_redirects=0</pre> To mak...
    Rule Medium Severity
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