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Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Version

V3R15

Benchmark ID

RHEL_7_STIG

Total Checks

244

Tags

linux

CAT I: 26CAT II: 205CAT 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 (244)

V-204392HIGHThe Red Hat Enterprise 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-204393MEDIUMThe Red Hat Enterprise 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-204394MEDIUMThe Red Hat Enterprise 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-204395MEDIUMThe Red Hat Enterprise 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-204396MEDIUMThe Red Hat Enterprise Linux operating system must enable a user session lock until that user re-establishes access using established identification and authentication procedures.V-204397MEDIUMThe Red Hat Enterprise Linux operating system must uniquely identify and must authenticate users using multifactor authentication via a graphical user logon.V-204398MEDIUMThe Red Hat Enterprise Linux operating system must initiate a screensaver after a 15-minute period of inactivity for graphical user interfaces.V-204399MEDIUMThe Red Hat Enterprise Linux operating system must prevent a user from overriding the screensaver lock-delay setting for the graphical user interface.V-204400MEDIUMThe Red Hat Enterprise Linux operating system must prevent a user from overriding the session idle-delay setting for the graphical user interface.V-204402MEDIUMThe Red Hat Enterprise Linux operating system must initiate a session lock for the screensaver after a period of inactivity for graphical user interfaces.V-204403MEDIUMThe Red Hat Enterprise Linux operating system must prevent a user from overriding the screensaver idle-activation-enabled setting for the graphical user interface.V-204404MEDIUMThe Red Hat Enterprise Linux operating system must initiate a session lock for graphical user interfaces when the screensaver is activated.V-204405MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that /etc/pam.d/passwd implements /etc/pam.d/system-auth when changing passwords.V-204406MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used.V-204407MEDIUMThe Red Hat Enterprise 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-204408MEDIUMThe Red Hat Enterprise 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-204409MEDIUMThe Red Hat Enterprise 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-204410MEDIUMThe Red Hat Enterprise 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-204411MEDIUMThe Red Hat Enterprise 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-204412MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that when passwords are changed a minimum of four character classes must be changed.V-204413MEDIUMThe Red Hat Enterprise 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-204414MEDIUMThe Red Hat Enterprise 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-204415MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the PAM system service is configured to store only encrypted representations of passwords.V-204416MEDIUMThe Red Hat Enterprise Linux operating system must be configured to use the shadow file to store only encrypted representations of passwords.V-204417MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that user and group account administration utilities are configured to store only encrypted representations of passwords.V-204418MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that passwords for new users are restricted to a 24 hours/1 day minimum lifetime.V-204419MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that passwords are restricted to a 24 hours/1 day minimum lifetime.V-204420MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that passwords for new users are restricted to a 60-day maximum lifetime.V-204421MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that existing passwords are restricted to a 60-day maximum lifetime.V-204422MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that passwords are prohibited from reuse for a minimum of five generations.V-204423MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that passwords are a minimum of 15 characters in length.V-204424HIGHThe Red Hat Enterprise Linux operating system must not allow accounts configured with blank or null passwords.V-204425HIGHThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using an empty password.V-204426MEDIUMThe Red Hat Enterprise Linux operating system must disable account identifiers (individuals, groups, roles, and devices) if the password expires.V-204427MEDIUMThe Red Hat Enterprise 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-204428MEDIUMThe Red Hat Enterprise Linux operating system must lock the associated account after three unsuccessful root logon attempts are made within a 15-minute period.V-204429MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that users must provide a password for privilege escalation.V-204430MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that users must re-authenticate for privilege escalation.V-204431MEDIUMThe Red Hat Enterprise 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-204432HIGHThe Red Hat Enterprise Linux operating system must not allow an unattended or automatic logon to the system via a graphical user interface.V-204433HIGHThe Red Hat Enterprise Linux operating system must not allow an unrestricted logon to the system.V-204434MEDIUMThe Red Hat Enterprise Linux operating system must not allow users to override SSH environment variables.V-204435MEDIUMThe Red Hat Enterprise Linux operating system must not allow a non-certificate trusted host SSH logon to the system.V-204437MEDIUMThe Red Hat Enterprise Linux operating system must require authentication upon booting into single-user and maintenance modes.V-204438HIGHRed Hat Enterprise 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-204440HIGHRed Hat Enterprise 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-204441MEDIUMThe Red Hat Enterprise Linux operating system must uniquely identify and must authenticate organizational users (or processes acting on behalf of organizational users) using multifactor authentication.V-204442HIGHThe Red Hat Enterprise Linux operating system must not have the rsh-server package installed.V-204443HIGHThe Red Hat Enterprise Linux operating system must not have the ypserv package installed.V-204444MEDIUMThe Red Hat Enterprise Linux operating system must prevent nonprivileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.V-204445MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that a file integrity tool verifies the baseline operating system configuration at least weekly.V-204446MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that designated personnel are notified if baseline configurations are changed in an unauthorized manner.V-204447HIGHThe Red Hat Enterprise 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-204448HIGHThe Red Hat Enterprise 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-204449MEDIUMThe Red Hat Enterprise Linux operating system must be configured to disable USB mass storage.V-204450MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the Datagram Congestion Control Protocol (DCCP) kernel module is disabled unless required.V-204451MEDIUMThe Red Hat Enterprise Linux operating system must disable the file system automounter unless required.V-204452LOWThe Red Hat Enterprise Linux operating system must remove all software components after updated versions have been installed.V-204453MEDIUMThe Red Hat Enterprise Linux operating system must enable SELinux.V-204454MEDIUMThe Red Hat Enterprise Linux operating system must enable the SELinux targeted policy.V-204455HIGHThe Red Hat Enterprise Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled on the command line.V-204456HIGHThe Red Hat Enterprise Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled in the Graphical User Interface.V-204457MEDIUMThe Red Hat Enterprise 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-204458HIGHThe Red Hat Enterprise Linux operating system must be a vendor supported release.V-204459MEDIUMThe Red Hat Enterprise Linux operating system security patches and updates must be installed and up to date.V-204460MEDIUMThe Red Hat Enterprise Linux operating system must not have unnecessary accounts.V-204461LOWThe Red Hat Enterprise 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-204462HIGHThe Red Hat Enterprise Linux operating system must be configured so that the root account must be the only account having unrestricted access to the system.V-204463MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all files and directories have a valid owner.V-204464MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all files and directories have a valid group owner.V-204466MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all local interactive user accounts, upon creation, are assigned a home directory.V-204467MEDIUMThe Red Hat Enterprise 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-204468MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all local interactive user home directories have mode 0750 or less permissive.V-204469MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all local interactive user home directories are owned by their respective users.V-204470MEDIUMThe Red Hat Enterprise 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-204471MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a valid owner.V-204472MEDIUMThe Red Hat Enterprise 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-204473MEDIUMThe Red Hat Enterprise 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-204474MEDIUMThe Red Hat Enterprise 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-204475MEDIUMThe Red Hat Enterprise 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-204476MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all local initialization files have mode 0740 or less permissive.V-204477MEDIUMThe Red Hat Enterprise 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-204478MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that local initialization files do not execute world-writable programs.V-204479MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all system device files are correctly labeled to prevent unauthorized modification.V-204480MEDIUMThe Red Hat Enterprise 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-204481MEDIUMThe Red Hat Enterprise 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-204482MEDIUMThe Red Hat Enterprise 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-204483MEDIUMThe Red Hat Enterprise Linux operating system must prevent binary files from being executed on file systems that are being imported via Network File System (NFS).V-204486LOWThe Red Hat Enterprise Linux operating system must mount /dev/shm with secure options.V-204487MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all world-writable directories are group-owned by root, sys, bin, or an application group.V-204488MEDIUMThe Red Hat Enterprise Linux operating system must set the umask value to 077 for all local interactive user accounts.V-204489MEDIUMThe Red Hat Enterprise Linux operating system must have cron logging implemented.V-204490MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the cron.allow file, if it exists, is owned by root.V-204491MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the cron.allow file, if it exists, is group-owned by root.V-204492MEDIUMThe Red Hat Enterprise Linux operating system must disable Kernel core dumps unless needed.V-204493LOWThe Red Hat Enterprise 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-204494LOWThe Red Hat Enterprise Linux operating system must use a separate file system for /var.V-204495LOWThe Red Hat Enterprise Linux operating system must use a separate file system for the system audit data path.V-204496LOWThe Red Hat Enterprise Linux operating system must use a separate file system for /tmp (or equivalent).V-204497HIGHThe Red Hat Enterprise 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-204498LOWThe Red Hat Enterprise Linux operating system must be configured so that the file integrity tool is configured to verify Access Control Lists (ACLs).V-204499LOWThe Red Hat Enterprise Linux operating system must be configured so that the file integrity tool is configured to verify extended attributes.V-204500MEDIUMThe Red Hat Enterprise 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-204501MEDIUMThe Red Hat Enterprise Linux operating system must not allow removable media to be used as the boot loader unless approved.V-204502HIGHThe Red Hat Enterprise Linux operating system must not have the telnet-server package installed.V-204503MEDIUMThe Red Hat Enterprise 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-204504MEDIUMThe Red Hat Enterprise 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-204506MEDIUMThe Red Hat Enterprise Linux operating system must be configured to off-load audit logs onto a different system or storage media from the system being audited.V-204507MEDIUMThe Red Hat Enterprise Linux operating system must take appropriate action when the remote logging buffer is full.V-204508MEDIUMThe Red Hat Enterprise Linux operating system must label all off-loaded audit logs before sending them to the central log server.V-204509MEDIUMThe Red Hat Enterprise Linux operating system must off-load audit records onto a different system or media from the system being audited.V-204510MEDIUMThe Red Hat Enterprise Linux operating system must encrypt the transfer of audit records off-loaded onto a different system or media from the system being audited.V-204511MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full.V-204512MEDIUMThe Red Hat Enterprise 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-204513MEDIUMThe Red Hat Enterprise 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% of the repository maximum audit record storage capacity.V-204514MEDIUMThe Red Hat Enterprise 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-204515MEDIUMThe Red Hat Enterprise 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-204516MEDIUMThe Red Hat Enterprise Linux operating system must audit all executions of privileged functions.V-204517MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the chown, fchown, fchownat, and lchown syscalls.V-204521MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the chmod, fchmod, and fchmodat syscalls.V-204524MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr syscalls.V-204531MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the creat, open, openat, open_by_handle_at, truncate, and ftruncate syscalls.V-204536MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the semanage command.V-204537MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the setsebool command.V-204538MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the chcon command.V-204539MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the setfiles command.V-204540MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all unsuccessful account access events.V-204541MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all successful account access events.V-204542MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the passwd command.V-204543MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the unix_chkpwd command.V-204544MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the gpasswd command.V-204545MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the chage command.V-204546MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the userhelper command.V-204547MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the su command.V-204548MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the sudo command.V-204549MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.V-204550MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the newgrp command.V-204551MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the chsh command.V-204552MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the mount command and syscall.V-204553MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the umount command.V-204554MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the postdrop command.V-204555MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the postqueue command.V-204556MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the ssh-keysign command.V-204557MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the crontab command.V-204558MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the pam_timestamp_check command.V-204559MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the create_module syscall.V-204560MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the init_module and finit_module syscalls.V-204562MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the delete_module syscall.V-204563MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the kmod command.V-204564MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/passwd.V-204565MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group.V-204566MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/gshadow.V-204567MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow.V-204568MEDIUMThe Red Hat Enterprise Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd.V-204572MEDIUMThe Red Hat Enterprise Linux operating system must audit all uses of the unlink, unlinkat, rename, renameat, and rmdir syscalls.V-204574MEDIUMThe Red Hat Enterprise Linux operating system must send rsyslog output to a log aggregation server.V-204575MEDIUMThe Red Hat Enterprise 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-204576LOWThe Red Hat Enterprise Linux operating system must limit the number of concurrent sessions to 10 for all accounts and/or account types.V-204577MEDIUMThe Red Hat Enterprise 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-204578MEDIUMThe Red Hat Enterprise Linux 7 operating system must implement DoD-approved encryption to protect the confidentiality of SSH connections.V-204579MEDIUMThe Red Hat Enterprise 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-204580MEDIUMThe Red Hat Enterprise 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-204581MEDIUMThe Red Hat Enterprise Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) authentication communications.V-204582MEDIUMThe Red Hat Enterprise Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.V-204583MEDIUMThe Red Hat Enterprise Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.V-204584MEDIUMThe Red Hat Enterprise Linux operating system must implement virtual address space randomization.V-204585MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all networked systems have SSH installed.V-204586MEDIUMThe Red Hat Enterprise 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-204587MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.V-204588MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using RSA rhosts authentication.V-204589MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.V-204590MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using rhosts authentication.V-204591MEDIUMThe Red Hat Enterprise Linux operating system must display the date and time of the last successful account logon upon an SSH logon.V-204592MEDIUMThe Red Hat Enterprise Linux operating system must not permit direct logons to the root account using remote access via SSH.V-204593MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using known hosts authentication.V-204594HIGHThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon is configured to only use the SSHv2 protocol.V-204595MEDIUMThe Red Hat Enterprise 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-204596MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH public host key files have mode 0644 or less permissive.V-204597MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH private host key files have mode 0640 or less permissive.V-204598MEDIUMThe Red Hat Enterprise 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-204599MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not permit Kerberos authentication unless needed.V-204600MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.V-204601MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon uses privilege separation.V-204602MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow compression or only allows compression after successful authentication.V-204603MEDIUMThe Red Hat Enterprise 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-204604MEDIUMThe Red Hat Enterprise Linux operating system must enable an application firewall, if available.V-204605LOWThe Red Hat Enterprise Linux operating system must display the date and time of the last successful account logon upon logon.V-204606HIGHThe Red Hat Enterprise Linux operating system must not contain .shosts files.V-204607HIGHThe Red Hat Enterprise Linux operating system must not contain shosts.equiv files.V-204608LOWFor Red Hat Enterprise Linux operating systems using DNS resolution, at least two name servers must be configured.V-204609MEDIUMThe Red Hat Enterprise Linux operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.V-204610MEDIUMThe Red Hat Enterprise Linux operating system must use a reverse-path filter for IPv4 network traffic when possible on all interfaces.V-204611MEDIUMThe Red Hat Enterprise Linux operating system must use a reverse-path filter for IPv4 network traffic when possible by default.V-204612MEDIUMThe Red Hat Enterprise Linux operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets by default.V-204613MEDIUMThe Red Hat Enterprise Linux operating system must not respond to Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) echoes sent to a broadcast address.V-204614MEDIUMThe Red Hat Enterprise Linux operating system must prevent Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages from being accepted.V-204615MEDIUMThe Red Hat Enterprise Linux operating system must ignore Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages.V-204616MEDIUMThe Red Hat Enterprise Linux operating system must not allow interfaces to perform Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirects by default.V-204617MEDIUMThe Red Hat Enterprise Linux operating system must not send Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirects.V-204618MEDIUMNetwork interfaces configured on the Red Hat Enterprise Linux operating system must not be in promiscuous mode.V-204619MEDIUMThe Red Hat Enterprise Linux operating system must be configured to prevent unrestricted mail relaying.V-204620HIGHThe Red Hat Enterprise Linux operating system must not have a File Transfer Protocol (FTP) server package installed unless needed.V-204621HIGHThe Red Hat Enterprise Linux operating system must not have the Trivial File Transfer Protocol (TFTP) server package installed if not required for operational support.V-204622MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that remote X connections are disabled except to fulfill documented and validated mission requirements.V-204623MEDIUMThe Red Hat Enterprise 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-204624MEDIUMThe Red Hat Enterprise Linux operating system must not have a graphical display manager installed unless approved.V-204625MEDIUMThe Red Hat Enterprise Linux operating system must not be performing packet forwarding unless the system is a router.V-204626MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that the Network File System (NFS) is configured to use RPCSEC_GSS.V-204627HIGHSNMP community strings on the Red Hat Enterprise Linux operating system must be changed from the default.V-204628MEDIUMThe Red Hat Enterprise Linux operating system access control program must be configured to grant or deny system access to specific hosts and services.V-204629MEDIUMThe Red Hat Enterprise Linux operating system must not have unauthorized IP tunnels configured.V-204630MEDIUMThe Red Hat Enterprise Linux operating system must not forward IPv6 source-routed packets.V-204631MEDIUMThe Red Hat Enterprise Linux operating system must have the required packages for multifactor authentication installed.V-204632MEDIUMThe Red Hat Enterprise Linux operating system must implement multifactor authentication for access to privileged accounts via pluggable authentication modules (PAM).V-204633MEDIUMThe Red Hat Enterprise Linux operating system must implement certificate status checking for PKI authentication.V-204634MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all wireless network adapters are disabled.V-214799HIGHThe Red Hat Enterprise Linux operating system must be configured so that the cryptographic hash of system files and commands matches vendor values.V-214800MEDIUMThe Red Hat Enterprise Linux operating system must implement the Endpoint Security for Linux Threat Prevention tool.V-214801HIGHThe Red Hat Enterprise Linux operating system must use a virus scan program.V-214937MEDIUMThe Red Hat Enterprise Linux operating system must prevent a user from overriding the screensaver lock-enabled setting for the graphical user interface.V-219059MEDIUMThe Red Hat Enterprise Linux operating system must disable the graphical user interface automounter unless required.V-228563MEDIUMThe Red Hat Enterprise Linux operating system must be configured so that all world-writable directories are owned by root, sys, bin, or an application user.V-228564MEDIUMThe Red Hat Enterprise Linux operating system must protect audit information from unauthorized read, modification, or deletion.V-233307MEDIUMThe Red Hat Enterprise Linux operating system SSH daemon must prevent remote hosts from connecting to the proxy display.V-237633MEDIUMThe Red Hat Enterprise Linux operating system must restrict privilege elevation to authorized personnel.V-237634MEDIUMThe Red Hat Enterprise Linux operating system must use the invoking user's password for privilege escalation when using "sudo".V-237635MEDIUMThe Red Hat Enterprise Linux operating system must require re-authentication when using the "sudo" command.V-244557MEDIUMRed Hat Enterprise 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-244558MEDIUMRed Hat Enterprise 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-250312MEDIUMThe Red Hat Enterprise Linux operating system must confine SELinux users to roles that conform to least privilege.V-250313MEDIUMThe Red Hat Enterprise Linux operating system must not allow privileged accounts to utilize SSH.V-250314MEDIUMThe Red Hat Enterprise Linux operating system must elevate the SELinux context when an administrator calls the sudo command.V-251702HIGHThe Red Hat Enterprise Linux operating system must not have accounts configured with blank or null passwords.V-251703MEDIUMThe Red Hat Enterprise Linux operating system must specify the default "include" directory for the /etc/sudoers file.V-251704MEDIUMThe Red Hat Enterprise Linux operating system must not be configured to bypass password requirements for privilege escalation.V-251705MEDIUMThe Red Hat Enterprise Linux operating system must use a file integrity tool to verify correct operation of all security functions.V-254523MEDIUMThe Red Hat Enterprise Linux operating system must automatically expire temporary accounts within 72 hours.V-255925MEDIUMThe Red Hat Enterprise Linux operating system SSH server must be configured to use only FIPS-validated key exchange algorithms.V-255926MEDIUMThe Red Hat Enterprise Linux operating system must have the screen package installed.V-255927LOWThe Red Hat Enterprise Linux operating system must restrict access to the kernel message buffer.V-255928MEDIUMThe Red Hat Enterprise Linux operating system must be configured to prevent overwriting of custom authentication configuration settings by the authconfig utility.V-256968MEDIUMThe Red Hat Enterprise Linux operating system must ensure cryptographic verification of vendor software packages.V-256969MEDIUMThe Red Hat Enterprise Linux operating system must disable the login screen user list for graphical user interfaces.V-256970MEDIUMThe Red Hat Enterprise Linux operating system must be configured to allow sending email notifications of configuration changes and adverse events to designated personnel.