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Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide (STIG) V1R12

Rules and Groups employed by this XCCDF Profile

  • ufw Must rate-limit network interfaces

    The operating system must configure the uncomplicated firewall to rate-limit impacted network interfaces. Check all the services listening to the ports with the following command: <pre>$ sudo ss -...
    Rule Medium Severity
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  • Wireless Networking

    Wireless networking, such as 802.11 (WiFi) and Bluetooth, can present a security risk to sensitive or classified systems and networks. Wireless networking hardware is much more likely to be include...
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  • Disable Wireless Through Software Configuration

    If it is impossible to remove the wireless hardware from the device in question, disable as much of it as possible through software. The following methods can disable software support for wireless ...
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  • Deactivate Wireless Network Interfaces

    Deactivating wireless network interfaces should prevent normal usage of the wireless capability. <br> <br> Verify that there are no wireless interfaces configured on the system with the f...
    Rule Medium Severity
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  • Transport Layer Security Support

    Support for Transport Layer Security (TLS), and its predecessor, the Secure Sockets Layer (SSL), is included in Red Hat Enterprise Linux in the OpenSSL software (RPM package <code>openssl</code>). ...
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  • Only Allow DoD PKI-established CAs

    The operating system must only allow the use of DoD PKI-established certificate authorities for verification of the establishment of protected sessions.
    Rule Medium Severity
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  • File Permissions and Masks

    Traditional Unix security relies heavily on file and directory permissions to prevent unauthorized users from reading or modifying files to which they should not have access. <br> <br> Severa...
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  • Verify Permissions on Important Files and Directories

    Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses important permission restrictions which can be verifie...
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  • Verify that All World-Writable Directories Have Sticky Bits Set

    When the so-called 'sticky bit' is set on a directory, only the owner of a given file may remove that file from the directory. Without the sticky bit, any user with write access to a directory may ...
    Rule Medium Severity
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  • Verify Permissions on /etc/audit/auditd.conf

    To properly set the permissions of /etc/audit/auditd.conf, run the command: 
    $ sudo chmod 0640 /etc/audit/auditd.conf
    Rule Medium Severity
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  • Verify Permissions on /etc/audit/rules.d/*.rules

    To properly set the permissions of /etc/audit/rules.d/*.rules, run the command: 
    $ sudo chmod 0640 /etc/audit/rules.d/*.rules
    Rule Medium Severity
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  • Verify permissions of log files

    Any operating system providing too much information in error messages risks compromising the data and security of the structure, and content of error messages needs to be carefully considered by th...
    Rule Medium Severity
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  • Verify Permissions on Files within /var/log Directory

    The /var/log directory contains files with logs of error messages in the system and should only be accessed by authorized personnel.
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  • Verify Group Who Owns /var/log Directory

    To properly set the group owner of /var/log, run the command: 
    $ sudo chgrp syslog /var/log
    Rule Medium Severity
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  • Verify Group Who Owns /var/log/syslog File

    To properly set the group owner of /var/log/syslog, run the command: 
    $ sudo chgrp adm /var/log/syslog
    Rule Medium Severity
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  • Verify User Who Owns /var/log Directory

    To properly set the owner of /var/log, run the command: 
    $ sudo chown root /var/log
    Rule Medium Severity
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  • Verify User Who Owns /var/log/syslog File

    To properly set the owner of /var/log/syslog, run the command: 
    $ sudo chown syslog /var/log/syslog
    Rule Medium Severity
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  • Verify Permissions on /var/log Directory

    To properly set the permissions of /var/log, run the command: 
    $ sudo chmod 0755 /var/log
    Rule Medium Severity
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  • Verify Permissions on /var/log/syslog File

    To properly set the permissions of /var/log/syslog, run the command: 
    $ sudo chmod 0640 /var/log/syslog
    Rule Medium Severity
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  • Verify File Permissions Within Some Important Directories

    Some directories contain files whose confidentiality or integrity is notably important and may also be susceptible to misconfiguration over time, particularly if unpackaged software is installed. A...
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