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III - Administrative Public

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must log IPv4 packets with impossible addresses.

    &lt;VulnDiscussion&gt;The presence of "martian" packets (which have impossible addresses) as well as spoofed packets, source-routed packets, and re...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must use a reverse-path filter for IPv4 network traffic.

    &lt;VulnDiscussion&gt;Enabling reverse path filtering drops packets with source addresses that should not have been able to be received on the inte...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must not perform IPv4 packet forwarding.

    &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
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must send TCP timestamps.

    &lt;VulnDiscussion&gt;TCP timestamps are used to provide protection against wrapped sequence numbers. It is possible to calculate system uptime (an...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must be configured to protect the Secure Shell (SSH) public host key from unauthorized modification.

    &lt;VulnDiscussion&gt;If a public host key file is modified by an unauthorized user, the SSH service may be compromised.&lt;/VulnDiscussion&gt;&lt;...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must be configured to protect the Secure Shell (SSH) private host key from unauthorized access.

    &lt;VulnDiscussion&gt;If an unauthorized user obtains the private SSH host key file, the host could be impersonated.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must enforce password complexity on the root account.

    &lt;VulnDiscussion&gt;Password complexity rules must apply to all accounts on the system, including root. Without specifying the enforce_for_root f...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must disable systemd fallback DNS.

    &lt;VulnDiscussion&gt;Systemd contains an ability to set fallback DNS servers, which is used for DNS lookups in the event no system level DNS serve...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must generate audit records for all access and modifications to the opasswd file.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
  • SRG-OS-000250-GPOS-00093

    <GroupDescription></GroupDescription>
    Group
  • The Photon operating system must implement only approved Message Authentication Codes (MACs) to protect the integrity of remote access sessions.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote acce...
    Rule High Severity

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