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Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • .Xauthority or X*.hosts (or equivalent) file(s) must be used to restrict access to the X server.

    &lt;VulnDiscussion&gt;If access to the X server is not restricted, a user's X session may be compromised.&lt;/VulnDiscussion&gt;&lt;FalsePositives&...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The .Xauthority utility must only permit access to authorized hosts.

    &lt;VulnDiscussion&gt;If unauthorized clients are permitted access to the X server, a user's X session may be compromised.&lt;/VulnDiscussion&gt;&l...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • X Window System connections that are not required must be disabled.

    &lt;VulnDiscussion&gt;If unauthorized clients are permitted access to the X server, a user's X session may be compromised.&lt;/VulnDiscussion&gt;&l...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The graphical login service provides the capability of logging into the system using an X-Windows type interface from the console. If graphical login access for the console is required, the service must be in local-only mode.

    &lt;VulnDiscussion&gt;Externally accessible graphical desktop software may open the system to remote attacks.&lt;/VulnDiscussion&gt;&lt;FalsePositi...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • Generic Security Services (GSS) must be disabled.

    &lt;VulnDiscussion&gt;This service should be disabled if it is not required.&lt;/VulnDiscussion&gt;&lt;FalsePositives&gt;&lt;/FalsePositives&gt;&lt...
    Rule Low Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • Systems services that are not required must be disabled.

    &lt;VulnDiscussion&gt;Services that are enabled but not required by the mission may provide excessive access or additional attack vectors to penetr...
    Rule Low Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • TCP Wrappers must be enabled and configured per site policy to only allow access by approved hosts and services.

    &lt;VulnDiscussion&gt;TCP Wrappers are a host-based access control system that allows administrators to control who has access to various network s...
    Rule Medium Severity
  • SRG-OS-000076

    <GroupDescription></GroupDescription>
    Group
  • User passwords must be changed at least every 60 days.

    &lt;VulnDiscussion&gt;Limiting the lifespan of authenticators limits the period of time an unauthorized user has access to the system while using c...
    Rule Medium Severity
  • SRG-OS-000002

    <GroupDescription></GroupDescription>
    Group
  • The operating system must automatically terminate temporary accounts within 72 hours.

    &lt;VulnDiscussion&gt;If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain...
    Rule Low Severity
  • SRG-OS-000075

    <GroupDescription></GroupDescription>
    Group
  • The operating system must enforce minimum password lifetime restrictions.

    &lt;VulnDiscussion&gt;Passwords need to be changed at specific policy-based intervals; however, if the information system or application allows the...
    Rule Medium Severity
  • SRG-OS-000078

    <GroupDescription></GroupDescription>
    Group
  • User passwords must be at least 15 characters in length.

    &lt;VulnDiscussion&gt;Password complexity, or strength, is a measure of the effectiveness of a password in resisting guessing and brute-force attac...
    Rule Medium Severity
  • SRG-OS-000072

    <GroupDescription></GroupDescription>
    Group
  • The system must require at least eight characters be changed between the old and new passwords during a password change.

    &lt;VulnDiscussion&gt;To ensure password changes are effective in their goals, the system must ensure old and new passwords have significant differ...
    Rule Medium Severity
  • SRG-OS-000069

    <GroupDescription></GroupDescription>
    Group
  • The system must require passwords to contain at least one uppercase alphabetic character.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000070

    <GroupDescription></GroupDescription>
    Group
  • The operating system must enforce password complexity requiring that at least one lowercase character is used.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000071

    <GroupDescription></GroupDescription>
    Group
  • The system must require passwords to contain at least one numeric character.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000266

    <GroupDescription></GroupDescription>
    Group
  • The system must require passwords to contain at least one special character.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The system must require passwords to contain no more than three consecutive repeating characters.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Low Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The system must not have accounts configured with blank or null passwords.

    &lt;VulnDiscussion&gt;Complex passwords can reduce the likelihood of success of automated password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;Fals...
    Rule Medium Severity
  • SRG-OS-000073

    <GroupDescription></GroupDescription>
    Group
  • Systems must employ cryptographic hashes for passwords using the SHA-2 family of algorithms or FIPS 140-2 approved successors.

    &lt;VulnDiscussion&gt;Cryptographic hashes provide quick password authentication while not actually storing the password.&lt;/VulnDiscussion&gt;&lt...
    Rule Medium Severity
  • SRG-OS-000021

    <GroupDescription></GroupDescription>
    Group
  • The system must disable accounts after three consecutive unsuccessful login attempts.

    &lt;VulnDiscussion&gt;Allowing continued access to accounts on the system exposes them to brute-force password-guessing attacks.&lt;/VulnDiscussion...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The delay between login prompts following a failed login attempt must be at least 4 seconds.

    &lt;VulnDiscussion&gt;As an immediate return of an error message, coupled with the capability to try again, may facilitate automatic and rapid-fire...
    Rule Medium Severity
  • SRG-OS-000028

    <GroupDescription></GroupDescription>
    Group
  • The system must require users to re-authenticate to unlock a graphical desktop environment.

    &lt;VulnDiscussion&gt;Allowing access to a graphical environment when the user is not attending the system can allow unauthorized users access to t...
    Rule Medium Severity
  • SRG-OS-000029

    <GroupDescription></GroupDescription>
    Group
  • Graphical desktop environments provided by the system must automatically lock after 15 minutes of inactivity.

    &lt;VulnDiscussion&gt;Allowing access to a graphical environment when the user is not attending the system can allow unauthorized users access to t...
    Rule Medium Severity
  • SRG-OS-000480

    <GroupDescription></GroupDescription>
    Group
  • The system must prevent the use of dictionary words for passwords.

    &lt;VulnDiscussion&gt;The use of common words in passwords simplifies password-cracking attacks.&lt;/VulnDiscussion&gt;&lt;FalsePositives&gt;&lt;/F...
    Rule Medium Severity
  • SRG-OS-000109

    <GroupDescription></GroupDescription>
    Group
  • The operating system must require individuals to be authenticated with an individual authenticator prior to using a group authenticator.

    &lt;VulnDiscussion&gt;Allowing any user to elevate their privileges can allow them excessive control of the system tools.&lt;/VulnDiscussion&gt;&lt...
    Rule Medium Severity

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