STIG IDSeverityRule TitleCommentUBTU-20-010005mediumThe Ubuntu operating system must allow users to directly initiate a session lock for all connection types.
UBTU-20-010007lowThe Ubuntu operating system must enforce 24 hours/1 day as the minimum password lifetime. Passwords for new users must have a 24 hours/1 day minimum password lifetime restriction.
UBTU-20-010008lowThe Ubuntu operating system must enforce a 60-day maximum password lifetime restriction. Passwords for new users must have a 60-day maximum password lifetime restriction.
UBTU-20-010013mediumThe Ubuntu operating system must automatically terminate a user session after inactivity timeouts have expired.
UBTU-20-010014mediumThe Ubuntu operating system must require users to reauthenticate for privilege escalation or when changing roles.
UBTU-20-010016mediumThe Ubuntu operating system default filesystem permissions must be defined in such a way that all authenticated users can read and modify only their own files.
UBTU-20-010035mediumThe Ubuntu operating system must use strong authenticators in establishing nonlocal maintenance and diagnostic sessions.
UBTU-20-010036mediumThe Ubuntu operating system must immediately terminate all network connections associated with SSH traffic after a period of inactivity.
UBTU-20-010037mediumThe Ubuntu operating system must immediately terminate all network connections associated with SSH traffic at the end of the session or after 10 minutes of inactivity.
UBTU-20-010038mediumThe Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting any local or remote connection to the system.Generic banner is used instead of DoD Notice.UBTU-20-010042highThe Ubuntu operating system must use SSH to protect the confidentiality and integrity of transmitted information.
UBTU-20-010043mediumThe Ubuntu operating system must configure the SSH daemon to use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hashes to prevent the unauthorized disclosure of information and/or detect changes to information during transmission.
UBTU-20-010047highThe Ubuntu operating system must not allow unattended or automatic login via SSH.
UBTU-20-010048highThe Ubuntu operating system must be configured so that remote X connections are disabled, unless to fulfill documented and validated mission requirements.
UBTU-20-010049mediumThe Ubuntu operating system SSH daemon must prevent remote hosts from connecting to the proxy display.
UBTU-20-010050lowThe Ubuntu operating system must enforce password complexity by requiring that at least one upper-case character be used.
UBTU-20-010051lowThe Ubuntu operating system must enforce password complexity by requiring that at least one lower-case character be used.
UBTU-20-010052lowThe Ubuntu operating system must enforce password complexity by requiring that at least one numeric character be used.
UBTU-20-010053lowThe Ubuntu operating system must require the change of at least 8 characters when passwords are changed.
UBTU-20-010054mediumThe Ubuntu operating system must enforce a minimum 15-character password length.
UBTU-20-010055lowThe Ubuntu operating system must enforce password complexity by requiring that at least one special character be used.
UBTU-20-010056mediumThe Ubuntu operating system must prevent the use of dictionary words for passwords.
UBTU-20-010057mediumThe Ubuntu operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used.
UBTU-20-010070lowThe Ubuntu operating system must prohibit password reuse for a minimum of five generations.
UBTU-20-010072lowThe Ubuntu operating system must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts have been made.
UBTU-20-010074mediumThe Ubuntu operating system must be configured so that the script which runs each 30 days or less to check file integrity is the default one.
UBTU-20-010075lowThe Ubuntu operating system must enforce a delay of at least 4 seconds between logon prompts following a failed logon attempt.
UBTU-20-010100mediumThe Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/passwd.
UBTU-20-010101mediumThe Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group.
UBTU-20-010102mediumThe Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow.
UBTU-20-010103mediumThe Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/gshadow.
UBTU-20-010104mediumThe Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/opasswd.
UBTU-20-010118mediumThe Ubuntu operating system must shut down by default upon audit failure (unless availability is an overriding concern).
UBTU-20-010122mediumThe Ubuntu operating system must be configured so that audit log files are not read or write-accessible by unauthorized users.
UBTU-20-010123mediumThe Ubuntu operating system must be configured to permit only authorized users ownership of the audit log files.
UBTU-20-010124mediumThe Ubuntu operating system must permit only authorized groups ownership of the audit log files.
UBTU-20-010128mediumThe Ubuntu operating system must be configured so that the audit log directory is not write-accessible by unauthorized users.
UBTU-20-010133mediumThe Ubuntu operating system must be configured so that audit configuration files are not write-accessible by unauthorized users.
UBTU-20-010134mediumThe Ubuntu operating system must permit only authorized accounts to own the audit configuration files.
UBTU-20-010135mediumThe Ubuntu operating system must permit only authorized groups to own the audit configuration files.
UBTU-20-010136mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the su command.
UBTU-20-010137mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chfn command.
UBTU-20-010138mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the mount command.
UBTU-20-010139mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the umount command.
UBTU-20-010140mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the ssh-agent command.
UBTU-20-010141mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the ssh-keysign command.
UBTU-20-010142mediumThe Ubuntu operating system must generate audit records for any use of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr system calls.
UBTU-20-010148mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chown, fchown, fchownat, and lchown system calls.
UBTU-20-010152mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chmod, fchmod, and fchmodat system calls.
UBTU-20-010155mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the creat, open, openat, open_by_handle_at, truncate, and ftruncate system calls.
UBTU-20-010161mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the sudo command.
UBTU-20-010162mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the sudoedit command.
UBTU-20-010163mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chsh command.
UBTU-20-010164mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the newgrp command.
UBTU-20-010165mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chcon command.
UBTU-20-010166mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the apparmor_parser command.
UBTU-20-010167mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the setfacl command.
UBTU-20-010168mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chacl command.
UBTU-20-010169mediumThe Ubuntu operating system must generate audit records for the use and modification of the tallylog file.
UBTU-20-010170mediumThe Ubuntu operating system must generate audit records for the use and modification of faillog file.
UBTU-20-010171mediumThe Ubuntu operating system must generate audit records for the use and modification of the lastlog file.
UBTU-20-010172mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the passwd command.
UBTU-20-010173mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the unix_update command.
UBTU-20-010174mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the gpasswd command.
UBTU-20-010175mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chage command.
UBTU-20-010176mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the usermod command.
UBTU-20-010177mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the crontab command.
UBTU-20-010178mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the pam_timestamp_check command.
UBTU-20-010179mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the init_module and finit_module syscalls.
UBTU-20-010181mediumThe Ubuntu operating system must generate audit records for successful/unsuccessful uses of the delete_module syscall.
UBTU-20-010182mediumThe Ubuntu operating system must produce audit records and reports containing information to establish when, where, what type, the source, and the outcome for all DoD-defined auditable events and actions in near real time.
UBTU-20-010198mediumThe Ubuntu operating system must initiate session audits at system start-up.
UBTU-20-010199mediumThe Ubuntu operating system must configure audit tools with a mode of 0755 or less permissive.
UBTU-20-010200mediumThe Ubuntu operating system must configure audit tools to be owned by root.
UBTU-20-010201mediumThe Ubuntu operating system must configure the audit tools to be group-owned by root.
UBTU-20-010205mediumThe Ubuntu operating system must use cryptographic mechanisms to protect the integrity of audit tools.
UBTU-20-010211mediumThe Ubuntu operating system must prevent all software from executing at higher privilege levels than users executing the software and the audit system must be configured to audit the execution of privileged functions.
UBTU-20-010230lowThe Ubuntu operating system must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT).
UBTU-20-010244mediumThe Ubuntu operating system must generate audit records for privileged activities, nonlocal maintenance, diagnostic sessions and other system-level access.
UBTU-20-010267mediumThe Ubuntu operating system must generate audit records for any successful/unsuccessful use of unlink, unlinkat, rename, renameat, and rmdir system calls.
UBTU-20-010277mediumThe Ubuntu operating system must generate audit records for the /var/log/wtmp file.
UBTU-20-010278mediumThe Ubuntu operating system must generate audit records for the /var/run/wtmp file.
UBTU-20-010279mediumThe Ubuntu operating system must generate audit records for the /var/log/btmp file.
UBTU-20-010296mediumThe Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use modprobe command.
UBTU-20-010297mediumThe Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use the kmod command.
UBTU-20-010298mediumThe Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use the fdisk command.
UBTU-20-010400lowThe Ubuntu operating system must limit the number of concurrent sessions to ten for all accounts and/or account types.
UBTU-20-010403mediumThe Ubuntu operating system must monitor remote access methods.
UBTU-20-010404mediumThe Ubuntu operating system must encrypt all stored passwords with a FIPS 140-2 approved cryptographic hashing algorithm.
UBTU-20-010405highThe Ubuntu operating system must not have the telnet package installed.
UBTU-20-010406highThe Ubuntu operating system must not have the rsh-server package installed.
UBTU-20-010407mediumThe Ubuntu operating system must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the PPSM CAL and vulnerability assessments.
UBTU-20-010408mediumThe Ubuntu operating system must prevent direct login into the root account.
UBTU-20-010411mediumThe Ubuntu operating system must set a sticky bit on all public directories to prevent unauthorized and unintended information transferred via shared system resources.
UBTU-20-010412mediumThe Ubuntu operating system must be configured to use TCP syncookies.
UBTU-20-010413mediumThe Ubuntu operating system must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail.
UBTU-20-010416mediumThe Ubuntu operating system must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.
UBTU-20-010417mediumThe Ubuntu operating system must configure the /var/log directory to be group-owned by syslog.
UBTU-20-010418mediumThe Ubuntu operating system must configure the /var/log directory to be owned by root.
UBTU-20-010419mediumThe Ubuntu operating system must configure the /var/log directory to have mode 0750 or less permissive.
UBTU-20-010420mediumThe Ubuntu operating system must configure the /var/log/syslog file to be group-owned by adm.Logs of processes running with reduced permissions are in /tmp/VeeamBackup because of thisUBTU-20-010421mediumThe Ubuntu operating system must configure /var/log/syslog file to be owned by syslog.
UBTU-20-010422mediumThe Ubuntu operating system must configure /var/log/syslog file with mode 0640 or less permissive.
UBTU-20-010423mediumThe Ubuntu operating system must have directories that contain system commands set to a mode of 0755 or less permissive.
UBTU-20-010424mediumThe Ubuntu operating system must have directories that contain system commands owned by root.
UBTU-20-010425mediumThe Ubuntu operating system must have directories that contain system commands group-owned by root.
UBTU-20-010426mediumThe Ubuntu operating system library files must have mode 0755 or less permissive.
UBTU-20-010427mediumThe Ubuntu operating system library directories must have mode 0755 or less permissive.
UBTU-20-010428mediumThe Ubuntu operating system library files must be owned by root.
UBTU-20-010429mediumThe Ubuntu operating system library directories must be owned by root.
UBTU-20-010430mediumThe Ubuntu operating system library files must be group-owned by root or a system account.
UBTU-20-010431mediumThe Ubuntu operating system library directories must be group-owned by root.
UBTU-20-010432mediumThe Ubuntu operating system must be configured to preserve log records from failure events.
UBTU-20-010433mediumThe Ubuntu operating system must have an application firewall installed in order to control remote access methods.
UBTU-20-010434mediumThe Ubuntu operating system must enable and run the uncomplicated firewall(ufw).
UBTU-20-010435mediumThe Ubuntu operating system must, for networked systems, compare internal information system clocks at least every 24 hours with a server which is synchronized to one of the redundant United States Naval Observatory (USNO) time servers, or a time server designated for the appropriate DoD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS).The script sets the “-R” flag in /etc/defaults/chrony

That prevents chrony from making big time changes during boot or restart of the service. See this blog post for details.

UBTU-20-010438mediumThe Ubuntu operating system’s Advance Package Tool (APT) must be configured to prevent the installation of patches, service packs, device drivers, or Ubuntu operating system components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.
UBTU-20-010439mediumThe Ubuntu operating system must be configured to use AppArmor.
UBTU-20-010446mediumThe Ubuntu operating system must configure the uncomplicated firewall to rate-limit impacted network interfaces.
UBTU-20-010448mediumThe Ubuntu operating system must implement address space layout randomization to protect its memory from unauthorized code execution.
UBTU-20-010449mediumThe Ubuntu operating system must be configured so that Advance Package Tool (APT) removes all software components after updated versions have been installed.
UBTU-20-010450mediumThe Ubuntu operating system must use a file integrity tool to verify correct operation of all security functions.
UBTU-20-010451mediumThe Ubuntu operating system must notify designated personnel if baseline configurations are changed in an unauthorized manner. The file integrity tool must notify the System Administrator when changes to the baseline configuration or anomalies in the operation of any security functions are discovered.
UBTU-20-010453lowThe Ubuntu operating system must display the date and time of the last successful account logon upon logon.
UBTU-20-010454mediumThe Ubuntu operating system must have an application firewall enabled.
UBTU-20-010456mediumThe Ubuntu operating system must have system commands set to a mode of 0755 or less permissive.
UBTU-20-010457mediumThe Ubuntu operating system must have system commands owned by root or a system account.
UBTU-20-010458mediumThe Ubuntu operating system must have system commands group-owned by root or a system account.
UBTU-20-010460highThe Ubuntu operating system must disable the x86 Ctrl-Alt-Delete key sequence.
UBTU-20-010462highThe Ubuntu operating system must not have accounts configured with blank or null passwords.
UBTU-20-010463highThe Ubuntu operating system must not allow accounts configured with blank or null passwords.
UBTU-20-010461mediumThe Ubuntu operating system must disable automatic mounting of Universal Serial Bus (USB) mass storage driver.