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III - Administrative Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The debug-shell systemd service must be disabled on TOSS.

    &lt;VulnDiscussion&gt;The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. Whi...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • The root account must be the only account having unrestricted access to the TOSS 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
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • The systemd Ctrl-Alt-Delete burst key sequence in TOSS 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
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • There must be no ".shosts" files on The TOSS operating system.

    &lt;VulnDiscussion&gt;The ."shosts" files are used to configure host-based authentication for individual users or the system via SSH. Host-based au...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • TOSS must not allow blank or null passwords in the system-auth file.

    &lt;VulnDiscussion&gt;If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with ...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • TOSS must not be performing 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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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • The TOSS SSH daemon must not allow authentication using known host's 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

    <GroupDescription></GroupDescription>
    Group
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  • The TOSS 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

    <GroupDescription></GroupDescription>
    Group
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  • The TOSS SSH daemon must not allow Kerberos authentication, except to fulfill documented and validated mission requirements.

    &lt;VulnDiscussion&gt;Configuring these settings for the SSH daemon provides additional assurance that remote logon via SSH will not use unused met...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00229

    <GroupDescription></GroupDescription>
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  • TOSS must not allow an unattended or automatic logon to the system.

    &lt;VulnDiscussion&gt;Failure to restrict system access to authenticated users negatively impacts operating system security.&lt;/VulnDiscussion&gt;...
    Rule High Severity
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  • SRG-OS-000021-GPOS-00005

    <GroupDescription></GroupDescription>
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  • TOSS must enforce the limit of five consecutive invalid logon attempts by a user during a 15-minute time period.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
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  • SRG-OS-000027-GPOS-00008

    <GroupDescription></GroupDescription>
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  • TOSS must limit the number of concurrent sessions to 256 for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Low Severity
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  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
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  • TOSS must retain a user's session lock until that user reestablishes access using established identification and authentication procedures.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000029-GPOS-00010

    <GroupDescription></GroupDescription>
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  • TOSS must automatically lock graphical user sessions after 15 minutes of inactivity.

    &lt;VulnDiscussion&gt;A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinit...
    Rule Medium Severity
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  • SRG-OS-000068-GPOS-00036

    <GroupDescription></GroupDescription>
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  • TOSS must map the authenticated identity to the user or group account for PKI-based authentication.

    &lt;VulnDiscussion&gt;Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the indivi...
    Rule Medium Severity
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  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
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  • TOSS duplicate User IDs (UIDs) must not exist for interactive users.

    &lt;VulnDiscussion&gt;To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to preven...
    Rule Medium Severity
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  • SRG-OS-000105-GPOS-00052

    <GroupDescription></GroupDescription>
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  • TOSS must use multifactor authentication for network and local access to privileged and nonprivileged accounts.

    &lt;VulnDiscussion&gt;Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor ...
    Rule Medium Severity
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  • SRG-OS-000118-GPOS-00060

    <GroupDescription></GroupDescription>
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  • TOSS must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

    &lt;VulnDiscussion&gt;Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potenti...
    Rule Medium Severity
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  • SRG-OS-000123-GPOS-00064

    <GroupDescription></GroupDescription>
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  • TOSS must automatically remove or disable emergency accounts after the crisis is resolved or 72 hours.

    &lt;VulnDiscussion&gt;Emergency accounts are privileged accounts that are established in response to crisis situations where the need for rapid acc...
    Rule Medium Severity
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  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
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  • TOSS must reveal error messages only to authorized users.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
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  • SRG-OS-000299-GPOS-00117

    <GroupDescription></GroupDescription>
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  • TOSS must protect wireless access to the system using authentication of users and/or devices.

    &lt;VulnDiscussion&gt;Allowing devices and users to connect to the system without first authenticating them allows untrusted access and can lead to...
    Rule Medium Severity
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  • SRG-OS-000329-GPOS-00128

    <GroupDescription></GroupDescription>
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  • TOSS must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes occur.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
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  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
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  • TOSS must require users to reauthenticate for privilege escalation.

    &lt;VulnDiscussion&gt;Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operat...
    Rule Medium Severity
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  • SRG-OS-000373-GPOS-00157

    <GroupDescription></GroupDescription>
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  • TOSS must require users to provide a password for privilege escalation.

    &lt;VulnDiscussion&gt;Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When operat...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • All TOSS local interactive user accounts must be assigned a home directory upon creation.

    &lt;VulnDiscussion&gt;If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...
    Rule Medium Severity
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