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Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000067-GPOS-00035

    <GroupDescription></GroupDescription>
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  • RHEL 9, for PKI-based authentication, must enforce authorized access to the corresponding private key.

    &lt;VulnDiscussion&gt;If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the ne...
    Rule Medium Severity
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  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
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  • RHEL 9 must require authentication to access emergency mode.

    &lt;VulnDiscussion&gt;To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-ap...
    Rule Medium Severity
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  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
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  • RHEL 9 must require authentication to access single-user mode.

    &lt;VulnDiscussion&gt;To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-ap...
    Rule Medium Severity
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  • SRG-OS-000120-GPOS-00061

    <GroupDescription></GroupDescription>
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  • RHEL 9 must prevent system daemons from using Kerberos for authentication.

    &lt;VulnDiscussion&gt;Unapproved mechanisms used for authentication to the cryptographic module are not verified; therefore, cannot be relied upon ...
    Rule Medium Severity
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  • SRG-OS-000066-GPOS-00034

    <GroupDescription></GroupDescription>
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  • RHEL 9, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.

    &lt;VulnDiscussion&gt;Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate n...
    Rule Medium Severity
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  • SRG-OS-000068-GPOS-00036

    <GroupDescription></GroupDescription>
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  • RHEL 9 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-000383-GPOS-00166

    <GroupDescription></GroupDescription>
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  • RHEL 9 must prohibit the use of cached authenticators after one day.

    &lt;VulnDiscussion&gt;If cached authentication information is out-of-date, the validity of the authentication information may be questionable.&lt;/...
    Rule Medium Severity
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  • SRG-OS-000363-GPOS-00150

    <GroupDescription></GroupDescription>
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  • RHEL 9 must have the AIDE package installed.

    &lt;VulnDiscussion&gt;Without verification of the security functions, security functions may not operate correctly, and the failure may go unnotice...
    Rule Medium Severity
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  • SRG-OS-000363-GPOS-00150

    <GroupDescription></GroupDescription>
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  • RHEL 9 must routinely check the baseline configuration for unauthorized changes and notify the system administrator when anomalies in the operation of any security functions are discovered.

    &lt;VulnDiscussion&gt;Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must use a file integrity tool that is configured to use FIPS 140-3-approved cryptographic hashes for validating file contents and directories.

    &lt;VulnDiscussion&gt;RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). ...
    Rule Medium Severity
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  • SRG-OS-000256-GPOS-00097

    <GroupDescription></GroupDescription>
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  • RHEL 9 must use cryptographic mechanisms to protect the integrity of audit tools.

    &lt;VulnDiscussion&gt;Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit in...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

    &lt;VulnDiscussion&gt;RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). ...
    Rule Low Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured so that the file integrity tool verifies extended attributes.

    &lt;VulnDiscussion&gt;RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). ...
    Rule Low Severity
    Show

  • SRG-OS-000479-GPOS-00224

    <GroupDescription></GroupDescription>
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  • RHEL 9 must have the rsyslog package installed.

    &lt;VulnDiscussion&gt;rsyslogd is a system utility providing support for message logging. Support for both internet and Unix domain sockets enables...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must have the packages required for encrypting offloaded audit logs installed.

    &lt;VulnDiscussion&gt;The rsyslog-gnutls package provides Transport Layer Security (TLS) support for the rsyslog daemon, which enables secure remot...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The rsyslog service on RHEL 9 must be active.

    &lt;VulnDiscussion&gt;The "rsyslog" service must be running to provide logging services, which are essential to system administration.&lt;/VulnDisc...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured so that the rsyslog daemon does not accept log messages from other servers unless the server is being used for log aggregation.

    &lt;VulnDiscussion&gt;Unintentionally running a rsyslog server accepting remote messages puts the system at increased risk. Malicious rsyslog messa...
    Rule Medium Severity
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  • SRG-OS-000032-GPOS-00013

    <GroupDescription></GroupDescription>
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  • All RHEL 9 remote access methods must be monitored.

    &lt;VulnDiscussion&gt;Logging remote access methods can be used to trace the decrease in the risks associated with remote user access management. I...
    Rule Medium Severity
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  • SRG-OS-000342-GPOS-00133

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  • RHEL 9 must be configured to offload audit records onto a different system from the system being audited via syslog.

    &lt;VulnDiscussion&gt;The auditd service does not include the ability to send audit records to a centralized server for management directly. Howeve...
    Rule Medium Severity
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  • SRG-OS-000342-GPOS-00133

    <GroupDescription></GroupDescription>
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  • RHEL 9 must authenticate the remote logging server for offloading audit logs via rsyslog.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common ...
    Rule Medium Severity
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  • SRG-OS-000342-GPOS-00133

    <GroupDescription></GroupDescription>
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  • RHEL 9 must encrypt the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common ...
    Rule Medium Severity
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  • SRG-OS-000342-GPOS-00133

    <GroupDescription></GroupDescription>
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  • RHEL 9 must encrypt via the gtls driver the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common ...
    Rule Medium Severity
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  • SRG-OS-000479-GPOS-00224

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured to forward audit records via TCP to a different system or media from the system being audited via rsyslog.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must use cron logging.

    &lt;VulnDiscussion&gt;Cron logging can be used to trace the successful or unsuccessful execution of cron jobs. It can also be used to spot intrusio...
    Rule Medium Severity
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  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
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  • RHEL 9 audit package must be installed.

    &lt;VulnDiscussion&gt;Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it...
    Rule Medium Severity
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