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Oracle Linux 7 Security Technical Implementation Guide

Version

V3R5

Benchmark ID

Oracle_Linux_7_STIG

Total Checks

243

Tags

linux
CAT I: 26CAT II: 204CAT III: 13

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: disa.stig_spt@mail.mil.

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Checks (243)

V-221652HIGHThe Oracle Linux operating system must be configured so that the file permissions, ownership, and group membership of system files and commands match the vendor values.V-221653HIGHThe Oracle Linux operating system must be configured so that the cryptographic hash of system files and commands matches vendor values.V-221654MEDIUMThe Oracle Linux operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon.V-221655MEDIUMThe Oracle Linux operating system must display the approved Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon.V-221656MEDIUMThe Oracle Linux operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a command line user logon.V-221657MEDIUMThe Oracle Linux operating system must enable a user session lock until that user re-establishes access using established identification and authentication procedures.V-221658MEDIUMThe Oracle Linux operating system must uniquely identify and must authenticate users using multifactor authentication via a graphical user logon.V-221659MEDIUMThe Oracle Linux operating system must prevent a user from overriding the screensaver lock-enabled setting for the graphical user interface.V-221660MEDIUMThe Oracle Linux operating system must initiate a screensaver after a 15-minute period of inactivity for graphical user interfaces.V-221661MEDIUMThe Oracle Linux operating system must prevent a user from overriding the screensaver lock-delay setting for the graphical user interface.V-221662MEDIUMThe Oracle Linux operating system must prevent a user from overriding the session idle-delay setting for the graphical user interface.V-221664MEDIUMThe Oracle Linux operating system must initiate a session lock for the screensaver after a period of inactivity for graphical user interfaces.V-221665MEDIUMThe Oracle Linux operating system must prevent a user from overriding the screensaver idle-activation-enabled setting for the graphical user interface.V-221666MEDIUMThe Oracle Linux operating system must initiate a session lock for graphical user interfaces when the screensaver is activated.V-221667MEDIUMThe Oracle Linux operating system must be configured so that /etc/pam.d/passwd implements /etc/pam.d/system-auth when changing passwords.V-221668MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used.V-221669MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed or new passwords are established, the new password must contain at least one upper-case character.V-221670MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed or new passwords are established, the new password must contain at least one lower-case character.V-221671MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed or new passwords are assigned, the new password must contain at least one numeric character.V-221672MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed or new passwords are established, the new password must contain at least one special character.V-221673MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed a minimum of eight of the total number of characters must be changed.V-221674MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed a minimum of four character classes must be changed.V-221675MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed the number of repeating consecutive characters must not be more than three characters.V-221676MEDIUMThe Oracle Linux operating system must be configured so that when passwords are changed the number of repeating characters of the same character class must not be more than four characters.V-221677MEDIUMThe Oracle Linux operating system must be configured so that the PAM system service is configured to store only encrypted representations of passwords.V-221678MEDIUMThe Oracle Linux operating system must be configured to use the shadow file to store only encrypted representations of passwords.V-221680MEDIUMThe Oracle Linux operating system must be configured so that user and group account administration utilities are configured to store only encrypted representations of passwords.V-221681MEDIUMThe Oracle Linux operating system must be configured so that passwords for new users are restricted to a 24 hours/1 day minimum lifetime.V-221682MEDIUMThe Oracle Linux operating system must be configured so that passwords are restricted to a 24 hours/1 day minimum lifetime.V-221683MEDIUMThe Oracle Linux operating system must be configured so that passwords for new users are restricted to a 60-day maximum lifetime.V-221684MEDIUMThe Oracle Linux operating system must be configured so that existing passwords are restricted to a 60-day maximum lifetime.V-221686MEDIUMThe Oracle Linux operating system must be configured so that passwords are a minimum of 15 characters in length.V-221687HIGHThe Oracle Linux operating system must not allow accounts configured with blank or null passwords.V-221688HIGHThe Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using an empty password.V-221689MEDIUMThe Oracle Linux operating system must disable account identifiers (individuals, groups, roles, and devices) if the password expires.V-221690MEDIUMThe Oracle Linux operating system must be configured to lock accounts for a minimum of 15 minutes after three unsuccessful logon attempts within a 15-minute timeframe.V-221691MEDIUMThe Oracle Linux operating system must lock the associated account after three unsuccessful root logon attempts are made within a 15-minute period.V-221692MEDIUMThe Oracle Linux operating system must be configured so that users must provide a password for privilege escalation.V-221693MEDIUMThe Oracle Linux operating system must be configured so that the delay between logon prompts following a failed console logon attempt is at least four seconds.V-221694HIGHThe Oracle Linux operating system must not allow an unattended or automatic logon to the system via a graphical user interface.V-221695HIGHThe Oracle Linux operating system must not allow an unrestricted logon to the system.V-221696MEDIUMThe Oracle Linux operating system must not allow users to override SSH environment variables.V-221697MEDIUMThe Oracle Linux operating system must not allow a non-certificate trusted host SSH logon to the system.V-221699MEDIUMThe Oracle Linux operating system must require authentication upon booting into single-user and maintenance modes.V-221700HIGHOracle Linux operating systems version 7.2 or newer with a Basic Input/Output System (BIOS) must require authentication upon booting into single-user and maintenance modes.V-221702HIGHOracle Linux operating systems version 7.2 or newer using Unified Extensible Firmware Interface (UEFI) must require authentication upon booting into single-user and maintenance modes.V-221703MEDIUMThe Oracle Linux operating system must uniquely identify and must authenticate organizational users (or processes acting on behalf of organizational users) using multifactor authentication.V-221704HIGHOracle Linux 7 must not install packages from the Extra Packages for Enterprise Linux (EPEL) repository.V-221705HIGHThe Oracle Linux operating system must not have the ypserv package installed.V-221707MEDIUMThe Oracle Linux operating system must prevent nonprivileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.V-221708MEDIUMThe Oracle Linux operating system must be configured so that a file integrity tool verifies the baseline operating system configuration at least weekly.V-221709MEDIUMThe Oracle Linux operating system must be configured so that designated personnel are notified if baseline configurations are changed in an unauthorized manner.V-221710HIGHThe Oracle Linux operating system must prevent the installation of software, patches, service packs, device drivers, or operating system components from a repository without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization.V-221711HIGHThe Oracle Linux operating system must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization.V-221712MEDIUMThe Oracle Linux operating system must be configured to disable USB mass storage.V-221713MEDIUMThe Oracle Linux operating system must be configured so that the Datagram Congestion Control Protocol (DCCP) kernel module is disabled unless required.V-221714MEDIUMThe Oracle Linux operating system must disable the file system automounter unless required.V-221715LOWThe Oracle Linux operating system must remove all software components after updated versions have been installed.V-221716MEDIUMThe Oracle Linux operating system must enable SELinux.V-221717HIGHThe Oracle Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled on the command line.V-221718MEDIUMThe Oracle Linux operating system must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.V-221719HIGHThe Oracle Linux operating system must be a vendor-supported release.V-221720MEDIUMThe Oracle Linux operating system security patches and updates must be installed and up to date.V-221721MEDIUMThe Oracle Linux operating system must not have unnecessary accounts.V-221722LOWThe Oracle Linux operating system must be configured so that all Group Identifiers (GIDs) referenced in the /etc/passwd file are defined in the /etc/group file.V-221723HIGHThe Oracle Linux operating system must be configured so that the root account must be the only account having unrestricted access to the system.V-221724MEDIUMThe Oracle Linux operating system must be configured so that all files and directories have a valid owner.V-221725MEDIUMThe Oracle Linux operating system must be configured so that all files and directories have a valid group owner.V-221727MEDIUMThe Oracle Linux operating system must be configured so that all local interactive user accounts, upon creation, are assigned a home directory.V-221728MEDIUMThe Oracle Linux operating system must be configured so that all local interactive users have a home directory assigned and defined in the /etc/passwd file.V-221729MEDIUMThe Oracle Linux operating system must be configured so that all local interactive user home directories have mode 0750 or less permissive.V-221730MEDIUMThe Oracle Linux operating system must be configured so that all local interactive user home directories are owned by their respective users.V-221731MEDIUMThe Oracle Linux operating system must be configured so that all local interactive user home directories are group-owned by the home directory owners primary group.V-221732MEDIUMThe Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a valid owner.V-221733MEDIUMThe Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories are group-owned by a group of which the home directory owner is a member.V-221734MEDIUMThe Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a mode of 0750 or less permissive.V-221735MEDIUMThe Oracle Linux operating system must be configured so that all local initialization files for interactive users are owned by the home directory user or root.V-221736MEDIUMThe Oracle Linux operating system must be configured so that all local initialization files for local interactive users are be group-owned by the users primary group or root.V-221737MEDIUMThe Oracle Linux operating system must be configured so that all local initialization files have mode 0740 or less permissive.V-221738MEDIUMThe Oracle Linux operating system must be configured so that all local interactive user initialization files executable search paths contain only paths that resolve to the users home directory.V-221739MEDIUMThe Oracle Linux operating system must be configured so that local initialization files do not execute world-writable programs.V-221740MEDIUMThe Oracle Linux operating system must be configured so that all system device files are correctly labeled to prevent unauthorized modification.V-221741MEDIUMThe Oracle Linux operating system must be configured so that file systems containing user home directories are mounted to prevent files with the setuid and setgid bit set from being executed.V-221742MEDIUMThe Oracle Linux operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are used with removable media.V-221743MEDIUMThe Oracle Linux operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are being imported via Network File System (NFS).V-221744MEDIUMThe Oracle Linux operating system must prevent binary files from being executed on file systems that are being imported via Network File System (NFS).V-221747LOWThe Oracle Linux operating system must mount /dev/shm with secure options.V-221748MEDIUMThe Oracle Linux operating system must be configured so that all world-writable directories are group-owned by root, sys, bin, or an application group.V-221749MEDIUMThe Oracle Linux operating system must set the umask value to 077 for all local interactive user accounts.V-221750MEDIUMThe Oracle Linux operating system must have cron logging implemented.V-221751MEDIUMThe Oracle Linux operating system must be configured so that the cron.allow file, if it exists, is owned by root.V-221752MEDIUMThe Oracle Linux operating system must be configured so that the cron.allow file, if it exists, is group-owned by root.V-221753MEDIUMThe Oracle Linux operating system must disable Kernel core dumps unless needed.V-221754LOWThe Oracle Linux operating system must be configured so that a separate file system is used for user home directories (such as /home or an equivalent).V-221755LOWThe Oracle Linux operating system must use a separate file system for /var.V-221756LOWThe Oracle Linux operating system must use a separate file system for the system audit data path large enough to hold at least one week of audit data.V-221757LOWThe Oracle Linux operating system must use a separate file system for /tmp (or equivalent).V-221758HIGHThe Oracle Linux operating system must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, to generate cryptographic hashes, and to protect data requiring data-at-rest protections in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.V-221759LOWThe Oracle Linux operating system must be configured so that the file integrity tool is configured to verify Access Control Lists (ACLs).V-221760LOWThe Oracle Linux operating system must be configured so that the file integrity tool is configured to verify extended attributes.V-221761MEDIUMThe Oracle Linux operating system must use a file integrity tool that is configured to use FIPS 140-2 approved cryptographic hashes for validating file contents and directories.V-221762MEDIUMThe Oracle Linux operating system must not allow removable media to be used as the boot loader unless approved.V-221763HIGHThe Oracle Linux operating system must not have the telnet-server package installed.V-221764MEDIUMThe Oracle Linux operating system must be configured so that auditing is configured to produce records containing information to establish what type of events occurred, where the events occurred, the source of the events, and the outcome of the events. These audit records must also identify individual identities of group account users.V-221765MEDIUMThe Oracle Linux operating system must shut down upon audit processing failure, unless availability is an overriding concern. If availability is a concern, the system must alert the designated staff (System Administrator [SA] and Information System Security Officer [ISSO] at a minimum) in the event of an audit processing failure.V-221767MEDIUMThe Oracle Linux operating system must be configured to off-load audit logs onto a different system or storage media from the system being audited.V-221768MEDIUMThe Oracle Linux operating system must take appropriate action when the remote logging buffer is full.V-221769MEDIUMThe Oracle Linux operating system must label all off-loaded audit logs before sending them to the central log server.V-221770MEDIUMThe Oracle Linux operating system must off-load audit records onto a different system or media from the system being audited.V-221771MEDIUMThe Oracle Linux operating system must encrypt the transfer of audit records off-loaded onto a different system or media from the system being audited.V-221772MEDIUMThe Oracle Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full.V-221773MEDIUMThe Oracle Linux operating system must be configured so that the audit system takes appropriate action when there is an error sending audit records to a remote system.V-221774MEDIUMThe Oracle Linux operating system must initiate an action to notify the System Administrator (SA) and Information System Security Officer (ISSO), at a minimum, when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.V-221775MEDIUMThe Oracle Linux operating system must immediately notify the System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) via email when the threshold for the repository maximum audit record storage capacity is reached.V-221776MEDIUMThe Oracle Linux operating system must immediately notify the System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) when the threshold for the repository maximum audit record storage capacity is reached.V-221777MEDIUMThe Oracle Linux operating system must audit all executions of privileged functions.V-221778MEDIUMThe Oracle Linux operating system must audit all uses of the chown, fchown, fchownat, and lchown syscalls.V-221782MEDIUMThe Oracle Linux operating system must audit all uses of the chmod, fchmod, and fchmodat syscalls.V-221785MEDIUMThe Oracle Linux operating system must audit all uses of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr syscalls.V-221792MEDIUMThe Oracle Linux operating system must audit all uses of the creat, open, openat, open_by_handle_at, truncate, and ftruncate syscalls.V-221797MEDIUMThe Oracle Linux operating system must audit all uses of the semanage command.V-221798MEDIUMThe Oracle Linux operating system must audit all uses of the setsebool command.V-221799MEDIUMThe Oracle Linux operating system must audit all uses of the chcon command.V-221800MEDIUMThe Oracle Linux operating system must audit all uses of the setfiles command.V-221801MEDIUMThe Oracle Linux operating system must generate audit records for all unsuccessful account access events.V-221802MEDIUMThe Oracle Linux operating system must generate audit records for all successful account access events.V-221803MEDIUMThe Oracle Linux operating system must audit all uses of the passwd command.V-221804MEDIUMThe Oracle Linux operating system must audit all uses of the unix_chkpwd command.V-221805MEDIUMThe Oracle Linux operating system must audit all uses of the gpasswd command.V-221806MEDIUMThe Oracle Linux operating system must audit all uses of the chage command.V-221807MEDIUMThe Oracle Linux operating system must audit all uses of the userhelper command.V-221808MEDIUMThe Oracle Linux operating system must audit all uses of the su command.V-221809MEDIUMThe Oracle Linux operating system must audit all uses of the sudo command.V-221810MEDIUMThe Oracle Linux operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.V-221811MEDIUMThe Oracle Linux operating system must audit all uses of the newgrp command.V-221812MEDIUMThe Oracle Linux operating system must audit all uses of the chsh command.V-221813MEDIUMThe Oracle Linux operating system must audit all uses of the mount command and syscall.V-221814MEDIUMThe Oracle Linux operating system must audit all uses of the umount command.V-221815MEDIUMThe Oracle Linux operating system must audit all uses of the postdrop command.V-221816MEDIUMThe Oracle Linux operating system must audit all uses of the postqueue command.V-221817MEDIUMThe Oracle Linux operating system must audit all uses of the ssh-keysign command.V-221818MEDIUMThe Oracle Linux operating system must audit all uses of the crontab command.V-221819MEDIUMThe Oracle Linux operating system must audit all uses of the pam_timestamp_check command.V-221820MEDIUMThe Oracle Linux operating system must audit all uses of the create_module syscall.V-221821MEDIUMThe Oracle Linux operating system must audit all uses of the init_module and finit_module syscalls.V-221823MEDIUMThe Oracle Linux operating system must audit all uses of the delete_module syscall.V-221824MEDIUMThe Oracle Linux operating system must audit all uses of the kmod command.V-221825MEDIUMThe Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/passwd.V-221826MEDIUMThe Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group.V-221827MEDIUMThe Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/gshadow.V-221828MEDIUMThe Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow.V-221829MEDIUMThe Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd.V-221833MEDIUMThe Oracle Linux operating system must audit all uses of the unlink, unlinkat, rename, renameat, and rmdir syscalls.V-221835MEDIUMThe Oracle Linux operating system must send rsyslog output to a log aggregation server.V-221836MEDIUMThe Oracle Linux operating system must be configured so that the rsyslog daemon does not accept log messages from other servers unless the server is being used for log aggregation.V-221837HIGHThe Oracle Linux operating system must use a virus scan program.V-221838LOWThe Oracle Linux operating system must limit the number of concurrent sessions to 10 for all accounts and/or account types.V-221839MEDIUMThe Oracle Linux operating system must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the Ports, Protocols, and Services Management Component Local Service Assessment (PPSM CLSA) and vulnerability assessments.V-221840MEDIUMThe Oracle Linux 7 operating system must implement DoD-approved encryption to protect the confidentiality of SSH connections.V-221841MEDIUMThe Oracle Linux operating system must be configured so that all network connections associated with a communication session are terminated at the end of the session or after 15 minutes of inactivity from the user at a command prompt, except to fulfill documented and validated mission requirements.V-221842MEDIUMThe Oracle Linux operating system must display the Standard Mandatory DoD Notice and Consent Banner immediately prior to, or as part of, remote access logon prompts.V-221843MEDIUMThe Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) authentication communications.V-221844MEDIUMThe Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.V-221845MEDIUMThe Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.V-221846MEDIUMThe Oracle Linux operating system must implement virtual address space randomization.V-221847MEDIUMThe Oracle Linux operating system must be configured so that all networked systems have SSH installed.V-221848MEDIUMThe Oracle Linux operating system must be configured so that all networked systems use SSH for confidentiality and integrity of transmitted and received information as well as information during preparation for transmission.V-221849MEDIUMThe Oracle Linux operating system must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.V-221850MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using RSA rhosts authentication.V-221851MEDIUMThe Oracle Linux operating system must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.V-221852MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using rhosts authentication.V-221853MEDIUMThe Oracle Linux operating system must display the date and time of the last successful account logon upon an SSH logon.V-221854MEDIUMThe Oracle Linux operating system must not permit direct logons to the root account using remote access via SSH.V-221855MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using known hosts authentication.V-221856HIGHThe Oracle Linux operating system must be configured so that the SSH daemon is configured to only use the SSHv2 protocol.V-221857MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon is configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms.V-221858MEDIUMThe Oracle Linux operating system must be configured so that the SSH public host key files have mode 0644 or less permissive.V-221859MEDIUMThe Oracle Linux operating system must be configured so the SSH private host key files have mode 0640 or less permissive.V-221860MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not permit Generic Security Service Application Program Interface (GSSAPI) authentication unless needed.V-221861MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not permit Kerberos authentication unless needed.V-221862MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.V-221863MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon uses privilege separation.V-221864MEDIUMThe Oracle Linux operating system must be configured so that the SSH daemon does not allow compression or only allows compression after successful authentication.V-221866MEDIUMThe Oracle Linux operating system must, for networked systems, synchronize clocks with a server that is synchronized to one of the redundant United States Naval Observatory (USNO) time servers, a time server designated for the appropriate DoD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS).V-221867MEDIUMThe Oracle Linux operating system must protect against or limit the effects of Denial of Service (DoS) attacks by validating the operating system is implementing rate-limiting measures on impacted network interfaces.V-221868MEDIUMThe Oracle Linux operating system must enable an application firewall, if available.V-221869LOWThe Oracle Linux operating system must display the date and time of the last successful account logon upon logon.V-221870HIGHThe Oracle Linux operating system must not contain .shosts files.V-221871HIGHThe Oracle Linux operating system must not contain shosts.equiv files.V-221872LOWFor Oracle Linux operating systems using DNS resolution, at least two name servers must be configured.V-221873MEDIUMThe Oracle Linux operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.V-221874MEDIUMThe Oracle Linux operating system must use a reverse-path filter for IPv4 network traffic when possible on all interfaces.V-221875MEDIUMThe Oracle Linux operating system must use a reverse-path filter for IPv4 network traffic when possible by default.V-221876MEDIUMThe Oracle Linux operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets by default.V-221877MEDIUMThe Oracle Linux operating system must not respond to Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) echoes sent to a broadcast address.V-221878MEDIUMThe Oracle Linux operating system must prevent Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages from being accepted.V-221879MEDIUMThe Oracle Linux operating system must ignore Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages.V-221880MEDIUMThe Oracle Linux operating system must not allow interfaces to perform Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirects by default.V-221881MEDIUMThe Oracle Linux operating system must not send Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirects.V-221882MEDIUMNetwork interfaces configured on The Oracle Linux operating system must not be in promiscuous mode.V-221883MEDIUMThe Oracle Linux operating system must be configured to prevent unrestricted mail relaying.V-221884HIGHThe Oracle Linux operating system must not have a File Transfer Protocol (FTP) server package installed unless needed.V-221885HIGHThe Oracle Linux operating system must not have the Trivial File Transfer Protocol (TFTP) server package installed if not required for operational support.V-221886MEDIUMThe Oracle Linux operating system must be configured so that remote X connections are disabled, unless to fulfill documented and validated mission requirements.V-221887MEDIUMThe Oracle Linux operating system must be configured so that if the Trivial File Transfer Protocol (TFTP) server is required, the TFTP daemon is configured to operate in secure mode.V-221888MEDIUMThe Oracle Linux operating system must not have a graphical display manager installed unless approved.V-221889MEDIUMThe Oracle Linux operating system must not be performing packet forwarding unless the system is a router.V-221890MEDIUMThe Oracle Linux operating system must be configured so that the Network File System (NFS) is configured to use RPCSEC_GSS.V-221891HIGHSNMP community strings on the Oracle Linux operating system must be changed from the default.V-221892MEDIUMThe Oracle Linux operating system access control program must be configured to grant or deny system access to specific hosts and services.V-221893MEDIUMThe Oracle Linux operating system must not have unauthorized IP tunnels configured.V-221894MEDIUMThe Oracle Linux operating system must not forward IPv6 source-routed packets.V-221895MEDIUMThe Oracle Linux operating system must have the required packages for multifactor authentication installed.V-221896MEDIUMThe Oracle Linux operating system must implement multifactor authentication for access to privileged accounts via pluggable authentication modules (PAM).V-221897MEDIUMThe Oracle Linux operating system must implement certificate status checking for PKI authentication.V-221898MEDIUMThe Oracle Linux operating system must be configured so that all wireless network adapters are disabled.V-221899MEDIUMThe Oracle Linux operating system must protect audit information from unauthorized read, modification, or deletion.V-228565HIGHThe Oracle Linux operating system must be configured so the x86 Ctrl-Alt-Delete key sequence is disabled in the Graphical User Interface.V-228566MEDIUMThe Oracle Linux operating system must be configured so that all world-writable directories are owned by root, sys, bin, or an application user.V-228567MEDIUMThe Oracle Linux operating system must disable the graphical user interface automounter unless required.V-228569MEDIUMThe Oracle Linux operating system must be configured so users must re-authenticate for privilege escalation.V-228570MEDIUMThe Oracle Linux operating system must enable the SELinux targeted policy.V-233306MEDIUMThe Oracle Linux operating system SSH daemon must prevent remote hosts from connecting to the proxy display.V-237627MEDIUMThe Oracle Linux operating system must restrict privilege elevation to authorized personnel.V-237628MEDIUMThe Oracle Linux operating system must use the invoking user's password for privilege escalation when using "sudo".V-237629MEDIUMThe Oracle Linux operating system must require re-authentication when using the "sudo" command.V-244555MEDIUMOracle Linux operating systems version 7.2 or newer booted with a BIOS must have a unique name for the grub superusers account when booting into single-user and maintenance modes.V-244556MEDIUMOracle Linux operating systems version 7.2 or newer booted with United Extensible Firmware Interface (UEFI) must have a unique name for the grub superusers account when booting into single-user mode and maintenance.V-250309MEDIUMThe Oracle Linux operating system must confine SELinux users to roles that conform to least privilege.V-250310MEDIUMThe Oracle Linux operating system must not allow privileged accounts to utilize SSH.V-250311MEDIUMThe Oracle Linux operating system must elevate the SELinux context when an administrator calls the sudo command.V-251698HIGHThe Oracle Linux operating system must not have accounts configured with blank or null passwords.V-251699MEDIUMThe Oracle Linux operating system must specify the default "include" directory for the /etc/sudoers file.V-251700MEDIUMThe Oracle Linux operating system must not be configured to bypass password requirements for privilege escalation.V-251701MEDIUMThe Oracle Linux operating system must use a file integrity tool to verify correct operation of all security functions.V-254522MEDIUMThe Oracle Linux operating system must automatically expire temporary accounts within 72 hours.V-255899MEDIUMThe Oracle Linux operating system SSH server must be configured to use only FIPS-validated key exchange algorithms.V-255901LOWThe Oracle Linux operating system must restrict access to the kernel message buffer.V-255902MEDIUMThe Oracle Linux operating system must be configured to prevent overwriting of custom authentication configuration settings by the authconfig utility.V-256975MEDIUMThe Oracle Linux operating system must ensure cryptographic verification of vendor software packages.V-256976MEDIUMThe Oracle Linux operating system must disable the login screen user list for graphical user interfaces.V-256977MEDIUMThe Oracle Linux operating system must be configured to allow sending email notifications of unauthorized configuration changes to designated personnel.V-274875MEDIUMOL 7 must audit any script or executable called by cron as root or by any privileged user.