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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a SSH logon.

    &lt;VulnDiscussion&gt;The warning message reinforces policy awareness during the logon process and facilitates possible legal action against attack...
    Rule Medium Severity
  • SRG-OS-000032-GPOS-00013

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must log SSH connection attempts and failures to the server.

    &lt;VulnDiscussion&gt;SSH provides several logging levels with varying amounts of verbosity. "DEBUG" is specifically not recommended other than str...
    Rule Medium Severity
  • SRG-OS-000105-GPOS-00052

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 SSHD must accept public key authentication.

    &lt;VulnDiscussion&gt;Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor a...
    Rule Medium Severity
  • SRG-OS-000106-GPOS-00053

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 SSHD must not allow blank passwords.

    &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
  • SRG-OS-000109-GPOS-00056

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must not permit direct logons to the root account using remote access via SSH.

    &lt;VulnDiscussion&gt;Even though the communications channel may be encrypted, an additional layer of security is gained by extending the policy of...
    Rule Medium Severity
  • SRG-OS-000125-GPOS-00065

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must enable the Pluggable Authentication Module (PAM) interface for SSHD.

    &lt;VulnDiscussion&gt;When UsePAM is set to "yes", PAM runs through account and session types properly. This is important when restricted access to...
    Rule High Severity
  • SRG-OS-000250-GPOS-00093

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 SSH daemon must be configured to use system-wide crypto policies.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote acce...
    Rule Medium Severity
  • SRG-OS-000250-GPOS-00093

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must implement DOD-approved encryption ciphers to protect the confidentiality of SSH client connections.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote acce...
    Rule Medium Severity
  • SRG-OS-000250-GPOS-00093

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must implement DOD-approved encryption ciphers to protect the confidentiality of SSH server connections.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote acce...
    Rule Medium Severity
  • SRG-OS-000250-GPOS-00093

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 SSH server must be configured to use only Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms.

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

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