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DRAFT - ANSSI-BP-028 (enhanced)

Rules and Groups employed by this XCCDF Profile

  • Configure the confidence in TPM for entropy

    The TPM security chip that is available in most modern systems has a hardware RNG. It is also used to feed the entropy pool, but generally not cred...
    Rule Low Severity
    Show

  • Disable merging of slabs with similar size

    The kernel may merge similar slabs together to reduce overhead and increase cache hotness of objects. Disabling merging of slabs keeps the slabs se...
    Rule Medium Severity
    Show

  • Configure Speculative Store Bypass Mitigation

    Certain CPUs are vulnerable to an exploit against a common wide industry wide performance optimization known as Speculative Store Bypass (SSB). In...
    Rule Medium Severity
    Show

  • Enforce Spectre v2 mitigation

    Spectre V2 is an indirect branch poisoning attack that can lead to data leakage. An exploit for Spectre V2 tricks the indirect branch predictor int...
    Rule High Severity
    Show

  • Non-UEFI GRUB2 bootloader configuration

    Non-UEFI GRUB2 bootloader configuration
    Group
    Show

  • Verify /boot/grub2/grub.cfg Group Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be group-owned by the <code>root</code> group to prevent destruction or modification of the file....
    Rule Medium Severity
    Show

  • Verify /boot/grub2/user.cfg Group Ownership

    The file <code>/boot/grub2/user.cfg</code> should be group-owned by the <code>root</code> group to prevent reading or modification of the file. To...
    Rule Medium Severity
    Show

  • Verify /boot/grub2/grub.cfg User Ownership

    The file <code>/boot/grub2/grub.cfg</code> should be owned by the <code>root</code> user to prevent destruction or modification of the file. To pr...
    Rule Medium Severity
    Show

  • Verify /boot/grub2/user.cfg User Ownership

    The file <code>/boot/grub2/user.cfg</code> should be owned by the <code>root</code> user to prevent reading or modification of the file. To proper...
    Rule Medium Severity
    Show

  • Verify /boot/grub2/grub.cfg Permissions

    File permissions for <code>/boot/grub2/grub.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/grub.cfg</code>,...
    Rule Medium Severity
    Show

  • Verify /boot/grub2/user.cfg Permissions

    File permissions for <code>/boot/grub2/user.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/user.cfg</code>,...
    Rule Medium Severity
    Show

  • Set Boot Loader Password in grub2

    The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br> <br> Since plaint...
    Rule High Severity
    Show

  • UEFI GRUB2 bootloader configuration

    UEFI GRUB2 bootloader configuration
    Group
    Show

  • 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 plaint...
    Rule High Severity
    Show

  • 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, lac...
    Group
    Show

  • Ensure rsyslog-gnutls is installed

    TLS protocol support for rsyslog is installed. The <code>rsyslog-gnutls</code> package can be installed with the following command: <pre> $ sudo d...
    Rule Medium Severity
    Show

  • Ensure Proper Configuration of Log Files

    The file <code>/etc/rsyslog.conf</code> controls where log message are written. These are controlled by lines called <i>rules</i>, which consist of...
    Group
    Show

  • Ensure Log Files Are Owned By Appropriate Group

    The group-owner of all log files written by <code>rsyslog</code> should be <code>root</code>. These log files are determined by the second part of ...
    Rule Medium Severity
    Show

  • Ensure Log Files Are Owned By Appropriate User

    The owner of all log files written by <code>rsyslog</code> should be <code>root</code>. These log files are determined by the second part of each...
    Rule Medium Severity
    Show

  • Ensure System Log Files Have Correct Permissions

    The file permissions for all log files written by <code>rsyslog</code> should be set to 640, or more restrictive. These log files are determined by...
    Rule Medium Severity
    Show

  • Ensure All Logs are Rotated by logrotate

    Edit the file <code>/etc/logrotate.d/syslog</code>. Find the first line, which should look like this (wrapped for clarity): <pre>/var/log/message...
    Group
    Show

  • Ensure logrotate is Installed

    logrotate is installed by default. The <code>logrotate</code> package can be installed with the following command: <pre> $ sudo dnf install logrota...
    Rule Medium Severity
    Show

  • Ensure Logrotate Runs Periodically

    The <code>logrotate</code> utility allows for the automatic rotation of log files. The frequency of rotation is specified in <code>/etc/logrotate....
    Rule Medium Severity
    Show

  • Enable logrotate Timer

    The logrotate timer can be enabled with the following command: 
    $ sudo systemctl enable logrotate.timer
    Rule Medium Severity
    Show

  • 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...
    Group
    Show

  • Ensure Logs Sent To Remote Host

    To configure rsyslog to send logs to a remote log server, open <code>/etc/rsyslog.conf</code> and read and understand the last section of the file,...
    Rule Medium Severity
    Show

  • 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...
    Rule Medium Severity
    Show

  • 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>De...
    Rule Medium Severity
    Show

  • 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 th...
    Group
    Show

  • IPSec Support

    Support for Internet Protocol Security (IPsec) is provided with Libreswan.
    Group
    Show

  • Verify Group Who Owns /etc/ipsec.d Directory

    To properly set the group owner of /etc/ipsec.d, run the command: 
    $ sudo chgrp root /etc/ipsec.d
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/ipsec.d Directory

    To properly set the owner of /etc/ipsec.d, run the command: 
    $ sudo chown root /etc/ipsec.d
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/ipsec.d Directory

    To properly set the permissions of /etc/ipsec.d, run the command: 
    $ sudo chmod 0700 /etc/ipsec.d
    Rule Medium Severity
    Show

  • Verify Group Who Owns /etc/ipsec.conf File

    To properly set the group owner of /etc/ipsec.conf, run the command: 
    $ sudo chgrp root /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify Group Who Owns /etc/ipsec.secrets File

    To properly set the group owner of /etc/ipsec.secrets, run the command: 
    $ sudo chgrp root /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/ipsec.conf File

    To properly set the owner of /etc/ipsec.conf, run the command: 
    $ sudo chown root /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/ipsec.secrets File

    To properly set the owner of /etc/ipsec.secrets, run the command: 
    $ sudo chown root /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/ipsec.conf File

    To properly set the permissions of /etc/ipsec.conf, run the command: 
    $ sudo chmod 0644 /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/ipsec.secrets File

    To properly set the permissions of /etc/ipsec.secrets, run the command: 
    $ sudo chmod 0644 /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • iptables and ip6tables

    A host-based firewall called <code>netfilter</code> is included as part of the Linux kernel distributed with the system. It is activated by default...
    Group
    Show

  • Verify Group Who Owns /etc/iptables Directory

    To properly set the group owner of /etc/iptables, run the command: 
    $ sudo chgrp root /etc/iptables
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/iptables Directory

    To properly set the owner of /etc/iptables, run the command: 
    $ sudo chown root /etc/iptables
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/iptables Directory

    To properly set the permissions of /etc/iptables, run the command: 
    $ sudo chmod 0700 /etc/iptables
    Rule Medium Severity
    Show

  • IPv6

    The system includes support for Internet Protocol version 6. A major and often-mentioned improvement over IPv4 is its enormous increase in the numb...
    Group
    Show

  • 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 ...
    Group
    Show

  • Configure Accepting Default Router in Router Advertisements on All IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_ra_defrtr</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w...
    Rule Unknown Severity
    Show

  • Configure Accepting Prefix Information in Router Advertisements on All IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_ra_pinfo</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w ...
    Rule Unknown Severity
    Show

  • Configure Accepting Router Preference in Router Advertisements on All IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.all.accept_ra_rtr_pref</code> kernel parameter, run the following command: <pre>$ sudo sysctl ...
    Rule Unknown Severity
    Show

  • 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...
    Rule Medium Severity
    Show

  • 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...
    Rule Medium Severity
    Show

Node 2

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