II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000480-GPOS-00227
Group -
Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence.
A locally logged-on user who presses Ctrl-Alt-Delete, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the...Rule High Severity -
SRG-OS-000080-GPOS-00048
Group -
Ubuntu 22.04 LTS, when booted, must require authentication upon booting into single-user and maintenance modes.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems (e.g., web servers and web portals) must be...Rule High Severity -
SRG-OS-000254-GPOS-00095
Group -
Ubuntu 22.04 LTS must initiate session audits at system startup.
If auditing is enabled late in the startup process, the actions of some startup processes may not be audited. Some audit systems also maintain state information only available if auditing is enable...Rule Medium Severity -
SRG-OS-000138-GPOS-00069
Group -
Ubuntu 22.04 LTS must restrict access to the kernel message buffer.
Restricting access to the kernel message buffer limits access only to root. This prevents attackers from gaining additional system information as a nonprivileged user.Rule Low Severity -
SRG-OS-000184-GPOS-00078
Group -
Ubuntu 22.04 LTS must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail.
Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in denial of service by e...Rule Medium Severity -
SRG-OS-000433-GPOS-00193
Group -
Ubuntu 22.04 LTS must implement address space layout randomization to protect its memory from unauthorized code execution.
Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in prohibited memory locations. Security safeguards employed to protect memory include, for e...Rule Medium Severity -
SRG-OS-000433-GPOS-00192
Group -
Ubuntu 22.04 LTS must implement nonexecutable data to protect its memory from unauthorized code execution.
Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory inclu...Rule Medium Severity -
SRG-OS-000366-GPOS-00153
Group -
Ubuntu 22.04 LTS must be configured so that the Advance Package Tool (APT) prevents the installation of patches, service packs, device drivers, or operating system components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.
Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has bee...Rule Low Severity -
SRG-OS-000437-GPOS-00194
Group -
Ubuntu 22.04 LTS must be configured so that the Advance Package Tool (APT) removes all software components after updated versions have been installed.
Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by adversaries. Some information technology products may...Rule Medium Severity -
SRG-OS-000480-GPOS-00225
Group -
Ubuntu 22.04 LTS must have the "libpam-pwquality" package installed.
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
Ubuntu 22.04 LTS must have the "chrony" package installed.
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when condu...Rule Low Severity -
SRG-OS-000480-GPOS-00227
Group -
Ubuntu 22.04 LTS must not have the "systemd-timesyncd" package installed.
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when condu...Rule Low Severity -
SRG-OS-000480-GPOS-00227
Group -
Ubuntu 22.04 LTS must not have the "ntp" package installed.
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when condu...Rule Low Severity -
SRG-OS-000095-GPOS-00049
Group -
Ubuntu 22.04 LTS must not have the "rsh-server" package installed.
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooke...Rule High Severity -
SRG-OS-000074-GPOS-00042
Group -
Ubuntu 22.04 LTS must not have the "telnet" package installed.
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities are often overlooked and theref...Rule High Severity -
SRG-OS-000185-GPOS-00079
Group -
Ubuntu 22.04 LTS must implement cryptographic mechanisms to prevent unauthorized disclosure and modification of all information that requires protection at rest.
Operating systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. Select...Rule Medium Severity -
SRG-OS-000258-GPOS-00099
Group -
Ubuntu 22.04 LTS must have directories that contain system commands set to a mode of "755" or less permissive.
Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operatio...Rule Medium Severity -
SRG-OS-000259-GPOS-00100
Group -
Ubuntu 22.04 LTS must have system commands set to a mode of "755" or less permissive.
If Ubuntu 22.04 LTS were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a...Rule Medium Severity -
SRG-OS-000259-GPOS-00100
Group -
Ubuntu 22.04 LTS library files must have mode "755" or less permissive.
If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part ...Rule Medium Severity -
SRG-OS-000206-GPOS-00084
Group -
Ubuntu 22.04 LTS must configure the "/var/log" directory to have mode "755" or less permissive.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the operating system or pla...Rule Medium Severity -
SRG-OS-000205-GPOS-00083
Group -
Ubuntu 22.04 LTS must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.
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 -
SRG-OS-000205-GPOS-00083
Group -
Ubuntu 22.04 LTS must generate system journal entries without revealing information that could be exploited by adversaries.
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 -
SRG-OS-000206-GPOS-00084
Group -
Ubuntu 22.04 LTS must configure "/var/log/syslog" file with mode "640" or less permissive.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the operating system or pla...Rule Medium Severity -
SRG-OS-000256-GPOS-00097
Group -
Ubuntu 22.04 LTS must configure audit tools with a mode of "755" or less permissive.
Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operatio...Rule Medium Severity -
SRG-OS-000258-GPOS-00099
Group -
Ubuntu 22.04 LTS must have directories that contain system commands owned by "root".
Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operatio...Rule Medium Severity
Node 2
The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.