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Red Hat Enterprise Linux 8 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The x86 Ctrl-Alt-Delete key sequence must be disabled on RHEL 8.

    <VulnDiscussion>A locally logged-on user, who presses Ctrl-Alt-Delete when at the console, can reboot the system. If accidentally pressed, as...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The x86 Ctrl-Alt-Delete key sequence in RHEL 8 must be disabled if a graphical user interface is installed.

    &lt;VulnDiscussion&gt;A locally logged-on user, who presses Ctrl-Alt-Delete, when at the console, can reboot the system. If accidentally pressed, a...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The systemd Ctrl-Alt-Delete burst key sequence in RHEL 8 must be disabled.

    &lt;VulnDiscussion&gt;A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as c...
    Rule High Severity
    Show

  • The debug-shell systemd service must be disabled on RHEL 8.

    &lt;VulnDiscussion&gt;The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. Wh...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Trivial File Transfer Protocol (TFTP) server package must not be installed if not required for RHEL 8 operational support.

    &lt;VulnDiscussion&gt;If TFTP is required for operational support (such as the transmission of router configurations) its use must be documented wi...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The root account must be the only account having unrestricted access to the RHEL 8 system.

    &lt;VulnDiscussion&gt;If an account other than root also has a User Identifier (UID) of "0", it has root authority, giving that account unrestricte...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must prevent IPv6 Internet Control Message Protocol (ICMP) redirect messages from being accepted.

    &lt;VulnDiscussion&gt;ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not send Internet Control Message Protocol (ICMP) redirects.

    &lt;VulnDiscussion&gt;ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not respond to Internet Control Message Protocol (ICMP) echoes sent to a broadcast address.

    &lt;VulnDiscussion&gt;Responding to broadcast ICMP echoes facilitates network mapping and provides a vector for amplification attacks. There are n...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not forward IPv6 source-routed packets.

    &lt;VulnDiscussion&gt;Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than c...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not forward IPv6 source-routed packets by default.

    &lt;VulnDiscussion&gt;Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than c...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not enable IPv6 packet forwarding unless the system is a router.

    &lt;VulnDiscussion&gt;Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this s...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not accept router advertisements on all IPv6 interfaces.

    &lt;VulnDiscussion&gt;Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this s...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not accept router advertisements on all IPv6 interfaces by default.

    &lt;VulnDiscussion&gt;Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this s...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must not allow interfaces to perform Internet Control Message Protocol (ICMP) redirects by default.

    &lt;VulnDiscussion&gt;ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must ignore IPv6 Internet Control Message Protocol (ICMP) redirect messages.

    &lt;VulnDiscussion&gt;ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must disable access to network bpf syscall from unprivileged processes.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must restrict usage of ptrace to descendant processes.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must restrict exposed kernel pointer addresses access.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must disable the use of user namespaces.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must use reverse path filtering on all IPv4 interfaces.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 must be configured to prevent unrestricted mail relaying.

    &lt;VulnDiscussion&gt;If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sendi...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The RHEL 8 file integrity tool must be configured to verify extended attributes.

    &lt;VulnDiscussion&gt;Extended attributes in file systems are used to contain arbitrary data and file metadata with security implications. RHEL 8 ...
    Rule Low Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The RHEL 8 file integrity tool must be configured to verify Access Control Lists (ACLs).

    &lt;VulnDiscussion&gt;ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools. RHEL...
    Rule Low Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The graphical display manager must not be installed on RHEL 8 unless approved.

    &lt;VulnDiscussion&gt;Internet services that are not required for system or application processes must not be active to decrease the attack surface...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 8 network interfaces must not be in promiscuous mode.

    &lt;VulnDiscussion&gt;Network interfaces in promiscuous mode allow for the capture of all network traffic visible to the system. If unauthorized in...
    Rule Medium Severity
    Show

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