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II - Mission Support Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000480-GPOS-00227

    Group
  • The Red Hat Enterprise Linux operating system must be configured to prevent unrestricted mail relaying.

    If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sending spam or other unauthorized activity.
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    Group
  • The Red Hat Enterprise Linux operating system must not have a File Transfer Protocol (FTP) server package installed unless needed.

    The FTP service provides an unencrypted remote access that does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to log on using ...
    Rule High Severity
  • SRG-OS-000480-GPOS-00227

    Group
  • The Red Hat Enterprise Linux operating system must not have the Trivial File Transfer Protocol (TFTP) server package installed if not required for operational support.

    If TFTP is required for operational support (such as the transmission of router configurations) its use must be documented with the Information System Security Officer (ISSO), restricted to only au...
    Rule High Severity
  • SRG-OS-000480-GPOS-00227

    Group
  • The Red Hat Enterprise Linux operating system must be configured so that remote X connections are disabled except to fulfill documented and validated mission requirements.

    The security risk of using X11 forwarding is that the client's X11 display server may be exposed to attack when the SSH client requests forwarding. A system administrator may have a stance in which...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    Group
  • The Red Hat Enterprise Linux operating system must be configured so that if the Trivial File Transfer Protocol (TFTP) server is required, the TFTP daemon is configured to operate in secure mode.

    Restricting TFTP to a specific directory prevents remote users from copying, transferring, or overwriting system files.
    Rule Medium Severity

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