Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide

Description

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: [email protected]

Details

Version / Release: V1R2

Published: 2021-09-09

Updated At: 2021-11-06 12:46:46

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    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-238196r653763_rule UBTU-20-010000 CCI-000016 MEDIUM The Ubuntu operating system must provision temporary user accounts with an expiration time of 72 hours or less. If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain unauthorized access. To mitigate this risk, automated termination of all temporary accounts must be set upon account creation.
    SV-238197r653766_rule UBTU-20-010002 CCI-000048 MEDIUM The Ubuntu operating system must enable the graphical user logon banner to display the Standard Mandatory DoD Notice and Consent Banner before granting local access to the system via a graphical user logon. Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regul
    SV-238198r653769_rule UBTU-20-010003 CCI-000048 MEDIUM The Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local access to the system via a graphical user logon. Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regul
    SV-238199r653772_rule UBTU-20-010004 CCI-000056 MEDIUM The Ubuntu operating system must retain a user's session lock until that user reestablishes access using established identification and authentication procedures. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented
    SV-238200r653775_rule UBTU-20-010005 CCI-000058 MEDIUM The Ubuntu operating system must allow users to directly initiate a session lock for all connection types. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented
    SV-238201r653778_rule UBTU-20-010006 CCI-000187 HIGH The Ubuntu operating system must map the authenticated identity to the user or group account for PKI-based authentication. Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis.
    SV-238202r653781_rule UBTU-20-010007 CCI-000198 LOW The 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. Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, then the password could be repeate
    SV-238203r653784_rule UBTU-20-010008 CCI-000199 LOW The 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. Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the op
    SV-238204r653787_rule UBTU-20-010009 CCI-000213 HIGH Ubuntu operating systems 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 properly configured to incorporate access control methods
    SV-238205r653790_rule UBTU-20-010010 CCI-000764 MEDIUM The Ubuntu operating system must uniquely identify interactive users. To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the or
    SV-238206r653793_rule UBTU-20-010012 CCI-001084 HIGH The Ubuntu operating system must ensure only users who need access to security functions are part of sudo group. An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform security functions. Security functions are the hardware, software, and/or firmware of the information system responsible for e
    SV-238207r653796_rule UBTU-20-010013 CCI-002361 MEDIUM The Ubuntu operating system must automatically terminate a user session after inactivity timeouts have expired. Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of network connections that are associated with communications sessions (i.e., network disconnect). A logical session (for local, net
    SV-238208r653799_rule UBTU-20-010014 CCI-002038 MEDIUM The Ubuntu operating system must require users to reauthenticate for privilege escalation or when changing roles. Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. Satisfies: SRG-
    SV-238209r653802_rule UBTU-20-010016 CCI-000366 MEDIUM The 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. Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary access.
    SV-238210r653805_rule UBTU-20-010033 CCI-000765 MEDIUM The Ubuntu operating system must implement smart card logins for multifactor authentication for local and network access to privileged and non-privileged accounts. Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. Factors include: 1) something a user knows (e.
    SV-238211r653808_rule UBTU-20-010035 CCI-000877 MEDIUM The Ubuntu operating system must use strong authenticators in establishing nonlocal maintenance and diagnostic sessions. Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the internet) or an internal network. Local maintenance and diagnostic activities are those act
    SV-238212r653811_rule UBTU-20-010036 CCI-000879 MEDIUM The Ubuntu operating system must immediately terminate all network connections associated with SSH traffic after a period of inactivity. Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of network connections that are associated with communications sessions (i.e., network disconnect). A logical session (for local, net
    SV-238213r653814_rule UBTU-20-010037 CCI-001133 MEDIUM The 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. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminat
    SV-238214r653817_rule UBTU-20-010038 CCI-000048 MEDIUM The Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting any local or remote connection to the system. Display of a standardized and approved use notification before granting access to the publicly accessible operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, po
    SV-238215r653820_rule UBTU-20-010042 CCI-002418 HIGH The Ubuntu operating system must use SSH to protect the confidentiality and integrity of transmitted information. Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirement applies to both internal and external networks and a
    SV-238216r654316_rule UBTU-20-010043 CCI-001453 MEDIUM The 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. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating th
    SV-238217r653826_rule UBTU-20-010044 CCI-000068 MEDIUM The Ubuntu operating system must configure the SSH daemon to use FIPS 140-2 approved ciphers to prevent the unauthorized disclosure of information and/or detect changes to information during transmission. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating th
    SV-238218r653829_rule UBTU-20-010047 CCI-000366 HIGH The Ubuntu operating system must not allow unattended or automatic login via SSH. Failure to restrict system access to authenticated users negatively impacts Ubuntu operating system security.
    SV-238219r653832_rule UBTU-20-010048 CCI-000366 HIGH The Ubuntu operating system must be configured so that remote X connections are disabled, unless to fulfill documented and validated mission requirements. The security risk of using X11 forwarding is that the client's X11 display server may be exposed to attack when the SSH client requests forwarding. A System Administrator may have a stance in which they want to protect clients that may expose themselves
    SV-238220r653835_rule UBTU-20-010049 CCI-000366 MEDIUM The Ubuntu operating system SSH daemon must prevent remote hosts from connecting to the proxy display. When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets th
    SV-238221r653838_rule UBTU-20-010050 CCI-000192 LOW The Ubuntu operating system must enforce password complexity by requiring that at least one upper-case character be used. 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 resisting attempts at guessing and brute-force attacks. Passwor
    SV-238222r653841_rule UBTU-20-010051 CCI-000193 LOW The Ubuntu operating system must enforce password complexity by requiring that at least one lower-case character be used. 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 resisting attempts at guessing and brute-force attacks. Passwor
    SV-238223r653844_rule UBTU-20-010052 CCI-000194 LOW The Ubuntu operating system must enforce password complexity by requiring that at least one numeric character be used. 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 resisting attempts at guessing and brute-force attacks. Passwor
    SV-238224r653847_rule UBTU-20-010053 CCI-000195 LOW The Ubuntu operating system must require the change of at least 8 characters when passwords are changed. If the operating system allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at guessing and brute-force attacks. The number of c
    SV-238225r653850_rule UBTU-20-010054 CCI-000205 MEDIUM The Ubuntu operating system must enforce a minimum 15-character password length. The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and b
    SV-238226r653853_rule UBTU-20-010055 CCI-001619 LOW The Ubuntu operating system must enforce password complexity by requiring that at least one special character be used. 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 resisting attempts at guessing and brute-force attacks. Password
    SV-238227r653856_rule UBTU-20-010056 CCI-000366 MEDIUM The Ubuntu operating system must prevent the use of dictionary words for passwords. If the Ubuntu operating system allows the user to select passwords based on dictionary words, then this increases the chances of password compromise by increasing the opportunity for successful guesses and brute-force attacks.
    SV-238228r653859_rule UBTU-20-010057 CCI-000366 MEDIUM The Ubuntu operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used. 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 resisting attempts at guessing and brute-force attacks. "pwquality
    SV-238229r653862_rule UBTU-20-010060 CCI-000185 MEDIUM The Ubuntu operating system, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor. Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entity represented via a public key and associated data. It i
    SV-238230r653865_rule UBTU-20-010063 CCI-001948 MEDIUM The Ubuntu operating system must implement multifactor authentication for remote access to privileged accounts in such a way that one of the factors is provided by a device separate from the system gaining access. Using an authentication device, such as a CAC or token that is separate from the information system, ensures that even if the information system is compromised, that compromise will not affect credentials stored on the authentication device. Multifacto
    SV-238231r653868_rule UBTU-20-010064 CCI-001953 MEDIUM The Ubuntu operating system must accept Personal Identity Verification (PIV) credentials. The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use of the CAC to support identity management and personal authentication for systems covered under Homeland Security Presidential
    SV-238232r653871_rule UBTU-20-010065 CCI-001954 MEDIUM The Ubuntu operating system must electronically verify Personal Identity Verification (PIV) credentials. The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use of the CAC to support identity management and personal authentication for systems covered under Homeland Security Presidential
    SV-238233r653874_rule UBTU-20-010066 CCI-001991 MEDIUM The Ubuntu operating system for PKI-based authentication, must implement a local cache of revocation data in case of the inability to access revocation information via the network. Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer authorized (users with revoked certificates).
    SV-238234r685225_rule UBTU-20-010070 CCI-000196 LOW The Ubuntu operating system must prohibit password reuse for a minimum of five generations. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password
    SV-238235r802383_rule UBTU-20-010072 CCI-000044 LOW The 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. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-00002
    SV-238236r653883_rule UBTU-20-010074 CCI-002699 MEDIUM The 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. Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the
    SV-238237r653886_rule UBTU-20-010075 CCI-000366 LOW The Ubuntu operating system must enforce a delay of at least 4 seconds between logon prompts following a failed logon attempt. Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account.
    SV-238238r653889_rule UBTU-20-010100 CCI-000018 MEDIUM The Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/passwd. Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging th
    SV-238239r653892_rule UBTU-20-010101 CCI-000018 MEDIUM The Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group. Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging th
    SV-238240r653895_rule UBTU-20-010102 CCI-000018 MEDIUM The Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow. Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging th
    SV-238241r653898_rule UBTU-20-010103 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/gshadow. Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging th
    SV-238242r653901_rule UBTU-20-010104 CCI-000018 MEDIUM The Ubuntu operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/opasswd. Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging th
    SV-238243r653904_rule UBTU-20-010117 CCI-000139 MEDIUM The Ubuntu operating system must alert the ISSO and SA (at a minimum) in the event of an audit processing failure. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability, and system oper
    SV-238244r653907_rule UBTU-20-010118 CCI-000140 MEDIUM The Ubuntu operating system must shut down by default upon audit failure (unless availability is an overriding concern). It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include: software/hardware errors; failures in the audit capturing mechanisms; and au
    SV-238245r653910_rule UBTU-20-010122 CCI-000162 MEDIUM The Ubuntu operating system must be configured so that audit log files are not read or write-accessible by unauthorized users. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-238246r653913_rule UBTU-20-010123 CCI-000162 MEDIUM The Ubuntu operating system must be configured to permit only authorized users ownership of the audit log files. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-238247r802386_rule UBTU-20-010124 CCI-000162 MEDIUM The Ubuntu operating system must permit only authorized groups ownership of the audit log files. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-238248r653919_rule UBTU-20-010128 CCI-000164 MEDIUM The Ubuntu operating system must be configured so that the audit log directory is not write-accessible by unauthorized users. If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit information, the operating system must protect a
    SV-238249r653922_rule UBTU-20-010133 CCI-000171 MEDIUM The Ubuntu operating system must be configured so that audit configuration files are not write-accessible by unauthorized users. Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming
    SV-238250r653925_rule UBTU-20-010134 CCI-000171 MEDIUM The Ubuntu operating system must permit only authorized accounts to own the audit configuration files. Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelmin
    SV-238251r653928_rule UBTU-20-010135 CCI-000171 MEDIUM The Ubuntu operating system must permit only authorized groups to own the audit configuration files. Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelmin
    SV-238252r653931_rule UBTU-20-010136 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the su command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238253r653934_rule UBTU-20-010137 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chfn command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238254r653937_rule UBTU-20-010138 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the mount command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238255r653940_rule UBTU-20-010139 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the umount command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238256r653943_rule UBTU-20-010140 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the ssh-agent command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238257r653946_rule UBTU-20-010141 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the ssh-keysign command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238258r653949_rule UBTU-20-010142 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the setxattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238259r653952_rule UBTU-20-010143 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the lsetxattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238260r653955_rule UBTU-20-010144 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the fsetxattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238261r653958_rule UBTU-20-010145 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the removexattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238262r653961_rule UBTU-20-010146 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the lremovexattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238263r653964_rule UBTU-20-010147 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any use of the fremovexattr system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238264r653967_rule UBTU-20-010148 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chown system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238265r653970_rule UBTU-20-010149 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the fchown system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238266r653973_rule UBTU-20-010150 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the fchownat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238267r653976_rule UBTU-20-010151 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the lchown system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238268r653979_rule UBTU-20-010152 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chmod system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238269r653982_rule UBTU-20-010153 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the fchmod system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238270r653985_rule UBTU-20-010154 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the fchmodat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238271r653988_rule UBTU-20-010155 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the open system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238272r653991_rule UBTU-20-010156 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the truncate system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238273r653994_rule UBTU-20-010157 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the ftruncate system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238274r653997_rule UBTU-20-010158 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the creat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238275r654000_rule UBTU-20-010159 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the openat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238276r654003_rule UBTU-20-010160 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the open_by_handle_at system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238277r654006_rule UBTU-20-010161 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the sudo command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238278r654009_rule UBTU-20-010162 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the sudoedit command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238279r654012_rule UBTU-20-010163 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chsh command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238280r654015_rule UBTU-20-010164 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the newgrp command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238281r654018_rule UBTU-20-010165 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chcon command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238282r654021_rule UBTU-20-010166 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the apparmor_parser command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238283r654024_rule UBTU-20-010167 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the setfacl command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238284r654027_rule UBTU-20-010168 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chacl command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238285r654030_rule UBTU-20-010169 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the use and modification of the tallylog file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238286r654033_rule UBTU-20-010170 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the use and modification of faillog file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238287r654036_rule UBTU-20-010171 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the use and modification of the lastlog file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238288r654039_rule UBTU-20-010172 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the passwd command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238289r654042_rule UBTU-20-010173 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the unix_update command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238290r654045_rule UBTU-20-010174 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the gpasswd command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238291r654048_rule UBTU-20-010175 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chage command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238292r654051_rule UBTU-20-010176 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the usermod command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238293r654054_rule UBTU-20-010177 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the crontab command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238294r654057_rule UBTU-20-010178 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the pam_timestamp_check command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238295r654060_rule UBTU-20-010179 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the init_module syscall. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238296r654063_rule UBTU-20-010180 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the finit_module syscall. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238297r802387_rule UBTU-20-010181 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the delete_module syscall. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit reco
    SV-238298r654069_rule UBTU-20-010182 CCI-000130 MEDIUM The 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. Without establishing the when, where, type, source, and outcome of events that occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Without the capability to generate audit records, it w
    SV-238299r654072_rule UBTU-20-010198 CCI-001464 MEDIUM The Ubuntu operating system must initiate session audits at system start-up. If auditing is enabled late in the start-up process, the actions of some start-up processes may not be audited. Some audit systems also maintain state information only available if auditing is enabled before a given process is created.
    SV-238300r654075_rule UBTU-20-010199 CCI-001493 MEDIUM The Ubuntu operating system must configure audit tools with a mode of 0755 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 operation on audit information. Operating systems providing too
    SV-238301r654078_rule UBTU-20-010200 CCI-001493 MEDIUM The Ubuntu operating system must configure audit tools to be 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 operation on audit information. Operating systems providing too
    SV-238302r654081_rule UBTU-20-010201 CCI-001493 MEDIUM The Ubuntu operating system must configure the audit tools to be group-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 operation on audit information. Operating systems providing too
    SV-238303r654084_rule UBTU-20-010205 CCI-001496 MEDIUM The Ubuntu operating system must use cryptographic mechanisms to protect the integrity of audit tools. Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit information. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfu
    SV-238304r654087_rule UBTU-20-010211 CCI-002233 MEDIUM The 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. In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invo
    SV-238305r654090_rule UBTU-20-010215 CCI-001849 LOW The Ubuntu operating system must allocate audit record storage capacity to store at least one weeks' worth of audit records, when audit records are not immediately sent to a central audit record storage facility. In order to ensure operating systems have a sufficient storage capacity in which to write the audit logs, operating systems need to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually perfo
    SV-238306r654093_rule UBTU-20-010216 CCI-001851 LOW The Ubuntu operating system audit event multiplexor must be configured to off-load audit logs onto a different system or storage media from the system being audited. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00
    SV-238307r654096_rule UBTU-20-010217 CCI-001855 LOW The Ubuntu operating system must immediately notify the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75% of the repository maximum audit record storage capacity. If security personnel are not notified immediately when storage volume reaches 75% utilization, they are unable to plan for audit record storage capacity expansion.
    SV-238308r654099_rule UBTU-20-010230 CCI-001890 LOW The Ubuntu operating system must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT). If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analysis. Time stamps generated by the operating system include date and time. Time is commonly expressed in Coordinated Universal Ti
    SV-238309r654102_rule UBTU-20-010244 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for privileged activities, nonlocal maintenance, diagnostic sessions and other system-level access. If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing and investigating attacks would not be available. This requirement addresses auditing-related issues associated with maintenance
    SV-238310r654105_rule UBTU-20-010267 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any successful/unsuccessful use of unlink system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238311r654108_rule UBTU-20-010268 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any successful/unsuccessful use of unlinkat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238312r654111_rule UBTU-20-010269 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any successful/unsuccessful use of rename system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238313r654114_rule UBTU-20-010270 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for any successful/unsuccessful use of renameat system call. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238314r802390_rule UBTU-20-010276 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records when loading dynamic kernel modules. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit re
    SV-238315r654120_rule UBTU-20-010277 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the /var/log/wtmp file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238316r654123_rule UBTU-20-010278 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the /var/run/wtmp file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238317r654126_rule UBTU-20-010279 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records for the /var/log/btmp file. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238318r654129_rule UBTU-20-010296 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use modprobe command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238319r654132_rule UBTU-20-010297 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use the kmod command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238320r654135_rule UBTU-20-010298 CCI-000172 MEDIUM The Ubuntu operating system must generate audit records when successful/unsuccessful attempts to use the fdisk command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-238321r654138_rule UBTU-20-010300 CCI-001851 LOW The Ubuntu operating system must have a crontab script running weekly to offload audit events of standalone systems. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity.
    SV-238323r654144_rule UBTU-20-010400 CCI-000054 LOW The Ubuntu operating system must limit the number of concurrent sessions to ten for all accounts and/or account types. The Ubuntu operating system management includes the ability to control the number of users and user sessions that utilize an operating system. Limiting the number of allowed users and sessions per user is helpful in reducing the risks related to DoS attac
    SV-238324r654147_rule UBTU-20-010403 CCI-000067 MEDIUM The Ubuntu operating system must monitor remote access methods. Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to D
    SV-238325r654150_rule UBTU-20-010404 CCI-000803 MEDIUM The Ubuntu operating system must encrypt all stored passwords with a FIPS 140-2 approved cryptographic hashing algorithm. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised.
    SV-238326r654153_rule UBTU-20-010405 CCI-000197 HIGH The Ubuntu operating system must not have the telnet package installed. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised.
    SV-238327r654156_rule UBTU-20-010406 CCI-000381 HIGH The Ubuntu operating system 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 overlooked and therefore may remain unsecured. They increase the ri
    SV-238328r654159_rule UBTU-20-010407 CCI-000382 MEDIUM The 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. In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical po
    SV-238329r654162_rule UBTU-20-010408 CCI-000770 MEDIUM The Ubuntu operating system must prevent direct login into the root account. To assure individual accountability and prevent unauthorized access, organizational users must be individually identified and authenticated. A group authenticator is a generic account used by multiple individuals. Use of a group authenticator alone doe
    SV-238330r654165_rule UBTU-20-010409 CCI-000795 MEDIUM The Ubuntu operating system must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity. Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user acco
    SV-238331r654168_rule UBTU-20-010410 CCI-001682 LOW The Ubuntu operating system must automatically remove or disable emergency accounts after 72 hours. Emergency accounts are different from infrequently used accounts (i.e., local logon accounts used by the organization's System Administrator s when network or normal logon/access is not available). Infrequently used accounts are not subject to automatic t
    SV-238332r654171_rule UBTU-20-010411 CCI-001090 MEDIUM The Ubuntu operating system must set a sticky bit on all public directories to prevent unauthorized and unintended information transferred via shared system resources. Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from bein
    SV-238333r654174_rule UBTU-20-010412 CCI-001095 MEDIUM The Ubuntu operating system must be configured to use TCP syncookies. DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. Managing excess capacity ensures that sufficient capacity is availa
    SV-238334r654177_rule UBTU-20-010413 CCI-001190 MEDIUM The 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. 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 exhausting the available space on the target file system pa
    SV-238335r654180_rule UBTU-20-010414 CCI-001199 MEDIUM Ubuntu operating systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and tape drive, when used for backups) within an operating system. This requirement addresses protection of user-generated data, a
    SV-238336r654183_rule UBTU-20-010415 CCI-001233 LOW The Ubuntu operating system must deploy Endpoint Security for Linux Threat Prevention (ENSLTP). Without the use of automated mechanisms to scan for security flaws on a continuous and/or periodic basis, the operating system or other system components may remain vulnerable to the exploits presented by undetected software flaws. To support this requ
    SV-238337r654186_rule UBTU-20-010416 CCI-001312 MEDIUM The Ubuntu operating system 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 the organization. Organizations carefully consider the s
    SV-238338r654189_rule UBTU-20-010417 CCI-001314 MEDIUM The Ubuntu operating system must configure the /var/log directory to be group-owned by syslog. 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 platform. Additionally, Personally Identifiable Information (
    SV-238339r654192_rule UBTU-20-010418 CCI-001314 MEDIUM The Ubuntu operating system must configure the /var/log directory to be owned by root. 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 platform. Additionally, Personally Identifiable Information (
    SV-238340r654195_rule UBTU-20-010419 CCI-001314 MEDIUM The Ubuntu operating system must configure the /var/log directory to have mode 0750 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 platform. Additionally, Personally Identifiable Information (
    SV-238341r654198_rule UBTU-20-010420 CCI-001314 MEDIUM The Ubuntu operating system must configure the /var/log/syslog file to be group-owned by adm. 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 platform. Additionally, Personally Identifiable Information (
    SV-238342r654201_rule UBTU-20-010421 CCI-001314 MEDIUM The Ubuntu operating system must configure /var/log/syslog file to be owned by syslog. 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 platform. Additionally, Personally Identifiable Information (
    SV-238343r654204_rule UBTU-20-010422 CCI-001314 MEDIUM The Ubuntu operating system must configure /var/log/syslog file with mode 0640 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 platform. Additionally, Personally Identifiable Information (
    SV-238344r654207_rule UBTU-20-010423 CCI-001495 MEDIUM The Ubuntu operating system must have directories that contain system commands set to a mode of 0755 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 operation on audit information. Operating systems providing too
    SV-238345r654210_rule UBTU-20-010424 CCI-001495 MEDIUM The Ubuntu operating system 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 operation on audit information. Operating systems providing too
    SV-238346r654213_rule UBTU-20-010425 CCI-001495 MEDIUM The Ubuntu operating system must have directories that contain system commands group-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 operation on audit information. Operating systems providing too
    SV-238347r654216_rule UBTU-20-010426 CCI-001499 MEDIUM The Ubuntu operating system library files must have mode 0755 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 of a robust change management process. This requiremen
    SV-238348r654219_rule UBTU-20-010427 CCI-001499 MEDIUM The Ubuntu operating system library directories must have mode 0755 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 of a robust change management process. This requiremen
    SV-238349r654222_rule UBTU-20-010428 CCI-001499 MEDIUM The Ubuntu operating system library files must be owned by root. 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 of a robust change management process. This requiremen
    SV-238350r654225_rule UBTU-20-010429 CCI-001499 MEDIUM The Ubuntu operating system library directories must be owned by root. 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 of a robust change management process. This requiremen
    SV-238351r654228_rule UBTU-20-010430 CCI-001499 MEDIUM The Ubuntu operating system library files must be group-owned by root. 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 of a robust change management process. This requiremen
    SV-238352r654231_rule UBTU-20-010431 CCI-001499 MEDIUM The Ubuntu operating system library directories must be group-owned by root. 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 of a robust change management process. This requiremen
    SV-238353r654234_rule UBTU-20-010432 CCI-001665 MEDIUM The Ubuntu operating system must be configured to preserve log records from failure events. Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality, integrity, or availability in the event of a failure of the
    SV-238354r654237_rule UBTU-20-010433 CCI-002314 MEDIUM The Ubuntu operating system must have an application firewall installed in order to control remote access methods. Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD
    SV-238355r654240_rule UBTU-20-010434 CCI-002314 MEDIUM The Ubuntu operating system must enable and run the uncomplicated firewall(ufw). Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD
    SV-238356r654317_rule UBTU-20-010435 CCI-001891 MEDIUM The 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). 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 conducting forensic analysis and investigating system events. S
    SV-238357r654246_rule UBTU-20-010436 CCI-002046 LOW The Ubuntu operating system must synchronize internal information system clocks to the authoritative time source when the time difference is greater than one second. 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 conducting forensic analysis and investigating system events.
    SV-238358r654249_rule UBTU-20-010437 CCI-001744 MEDIUM The 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 oper Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be
    SV-238359r654319_rule UBTU-20-010438 CCI-001749 MEDIUM The 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. 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 been provided by a trusted vendor. Accordingly, patches, s
    SV-238360r654255_rule UBTU-20-010439 CCI-001764 MEDIUM The Ubuntu operating system must be configured to use AppArmor. Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users with functionality that exceeds mission requirements. This i
    SV-238361r654258_rule UBTU-20-010440 CCI-002041 MEDIUM The Ubuntu operating system must allow the use of a temporary password for system logons with an immediate change to a permanent password. Without providing this capability, an account may be created without a password. Non-repudiation cannot be guaranteed once an account is created if a user is not forced to change the temporary password upon initial logon. Temporary passwords are typica
    SV-238362r654261_rule UBTU-20-010441 CCI-002007 LOW The Ubuntu operating system must be configured such that Pluggable Authentication Module (PAM) prohibits the use of cached authentications after one day. If cached authentication information is out-of-date, the validity of the authentication information may be questionable.
    SV-238363r654320_rule UBTU-20-010442 CCI-002450 HIGH The Ubuntu operating system must implement NIST FIPS-validated cryptography to protect classified information and for the following: to provision digital signatures, to generate cryptographic hashes, and to protect unclassified information requiring confidentiality and cryptographic protection in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards. Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The operating system must implement cryptographic modules adhering to the higher standards approved by the federal government since this provide
    SV-238364r654267_rule UBTU-20-010443 CCI-002470 MEDIUM The Ubuntu operating system must only allow the use of DoD PKI-established certificate authorities for verification of the establishment of protected sessions. Untrusted Certificate Authorities (CA) can issue certificates, but they may be issued by organizations or individuals that seek to compromise DoD systems or by organizations with insufficient security controls. If the CA used for verifying the certificate
    SV-238365r654270_rule UBTU-20-010444 CCI-002475 MEDIUM Ubuntu operating system must implement cryptographic mechanisms to prevent unauthorized modification of all information 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. Selection of a cryptographic mechanism is based on the need to pro
    SV-238366r654273_rule UBTU-20-010445 CCI-002476 MEDIUM Ubuntu operating system must implement cryptographic mechanisms to prevent unauthorized disclosure of all information 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. Selection of a cryptographic mechanism is based on the need to pro
    SV-238367r654276_rule UBTU-20-010446 CCI-002385 MEDIUM The Ubuntu operating system must configure the uncomplicated firewall to rate-limit impacted network interfaces. Denial of service (DoS) is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. This requirement addresses the configuration of
    SV-238368r654279_rule UBTU-20-010447 CCI-002824 MEDIUM The Ubuntu operating system must implement non-executable data to protect its memory from unauthorized code execution. Some adversaries launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address sp
    SV-238369r654282_rule UBTU-20-010448 CCI-002824 MEDIUM The Ubuntu operating system 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 non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address sp
    SV-238370r654285_rule UBTU-20-010449 CCI-002617 MEDIUM The Ubuntu operating system must be configured so that 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 remove older versions of software automatically from the
    SV-238371r654288_rule UBTU-20-010450 CCI-002696 MEDIUM The Ubuntu operating system must use a file integrity tool to verify correct operation of all security functions. Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the
    SV-238372r654318_rule UBTU-20-010451 CCI-002702 MEDIUM The 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. Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the Ubuntu operating system. Changes to Ubuntu operating system configurations can have unintended side effects, some of
    SV-238373r654294_rule UBTU-20-010453 CCI-000366 LOW The Ubuntu operating system must display the date and time of the last successful account logon upon logon. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impactin
    SV-238374r654297_rule UBTU-20-010454 CCI-000366 MEDIUM The Ubuntu operating system must have an application firewall enabled. Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network.
    SV-238375r654300_rule UBTU-20-010455 CCI-002418 MEDIUM The Ubuntu operating system must disable all wireless network adapters. Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read, altered, or used to compromise the operating system. This requiremen
    SV-238376r654303_rule UBTU-20-010456 CCI-001499 MEDIUM The Ubuntu operating system must have system commands set to a mode of 0755 or less permissive. If the Ubuntu 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 of a robust change management process. This requ
    SV-238377r654306_rule UBTU-20-010457 CCI-001499 MEDIUM The Ubuntu operating system must have system commands owned by root. If the Ubuntu 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 of a robust change management process. This requ
    SV-238378r654309_rule UBTU-20-010458 CCI-001499 MEDIUM The Ubuntu operating system must have system commands group-owned by root. If the Ubuntu 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 of a robust change management process. This requ
    SV-238379r654312_rule UBTU-20-010459 CCI-000366 HIGH The Ubuntu operating system must disable the x86 Ctrl-Alt-Delete key sequence if a graphical user interface is installed. 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 risk of short-term loss of availability of systems due to
    SV-238380r654315_rule UBTU-20-010460 CCI-000366 HIGH The Ubuntu operating system 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 risk of short-term loss of availability of systems due to