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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000126-GPOS-00066

    <GroupDescription></GroupDescription>
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  • The SUSE operating system SSH daemon must be configured with a timeout interval.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
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  • SRG-OS-000163-GPOS-00072

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  • The SUSE operating system for all network connections associated with SSH traffic must immediately terminate at the end of the session or after 10 minutes of inactivity.

    &lt;VulnDiscussion&gt;Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system SSH daemon must be configured to not allow authentication using known hosts authentication.

    &lt;VulnDiscussion&gt;Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system SSH daemon public host key files must have mode 0644 or less permissive.

    &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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system SSH daemon private host key files must have mode 0640 or less permissive.

    &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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system SSH daemon must perform strict mode checking of home directory configuration files.

    &lt;VulnDiscussion&gt;If other users have access to modify user-specific SSH configuration files, they may be able to log on to the system as anoth...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system SSH daemon must use privilege separation.

    &lt;VulnDiscussion&gt;SSH daemon privilege separation causes the SSH process to drop root privileges when not needed, which would decrease the impa...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system SSH daemon must not allow compression or must only allow compression after successful authentication.

    &lt;VulnDiscussion&gt;If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could res...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system SSH daemon must disable forwarded remote X connections for interactive users, unless to fulfill documented and validated mission requirements.

    &lt;VulnDiscussion&gt;The security risk of using X11 forwarding is that the client's X11 display server may be exposed to attack when the SSH clien...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

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  • The SUSE operating system clock must, for networked systems, be synchronized to an authoritative DoD time source at least every 24 hours.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000359-GPOS-00146

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  • The SUSE operating system must be configured to use Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT).

    &lt;VulnDiscussion&gt;If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analys...
    Rule Low Severity
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  • SRG-OS-000433-GPOS-00192

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  • The SUSE operating system must implement kptr-restrict to prevent the leaking of internal kernel addresses.

    &lt;VulnDiscussion&gt;Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations t...
    Rule Medium Severity
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  • SRG-OS-000433-GPOS-00193

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  • Address space layout randomization (ASLR) must be implemented by the SUSE operating system to protect memory from unauthorized code execution.

    &lt;VulnDiscussion&gt;Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations t...
    Rule Medium Severity
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  • SRG-OS-000479-GPOS-00224

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  • The SUSE operating system must off-load rsyslog messages for networked systems in real time and off-load standalone systems at least weekly.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common...
    Rule Medium Severity
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  • SRG-OS-000142-GPOS-00071

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  • The SUSE operating system must be configured to use TCP syncookies.

    &lt;VulnDiscussion&gt;Denial of Service (DoS) is a condition when a resource is not available for legitimate users. When this occurs, the organizat...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not forward Internet Protocol version 4 (IPv4) 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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not forward Internet Protocol version 6 (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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not forward Internet Protocol version 4 (IPv4) 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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not respond to Internet Protocol version 4 (IPv4) 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.&lt;/VulnDi...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must prevent Internet Protocol version 4 (IPv4) 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
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system must not allow interfaces to accept Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages 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
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system must not allow interfaces to accept Internet Protocol version 6 (IPv6) Internet Control Message Protocol (ICMP) redirect messages 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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not allow interfaces to send Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages 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
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The SUSE operating system must not send Internet Protocol version 4 (IPv4) 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
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  • SRG-OS-000480-GPOS-00227

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  • The SUSE operating system must not be performing Internet Protocol version 4 (IPv4) 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
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Node 2

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