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I - Mission Critical Public

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000312-GPOS-00123

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must enable kernel parameters to enforce discretionary access control on symlinks.

    &lt;VulnDiscussion&gt;By enabling the fs.protected_symlinks kernel parameter, symbolic links are permitted to be followed only when outside a stick...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable the kernel.core_pattern.

    &lt;VulnDiscussion&gt;A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could ...
    Rule Medium Severity
  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must be configured to disable the Asynchronous Transfer Mode kernel module.

    &lt;VulnDiscussion&gt;Disabling Asynchronous Transfer Mode (ATM) protects the system against exploitation of any flaws in its implementation.&lt;/V...
    Rule Medium Severity
  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must be configured to disable the Controller Area Network kernel module.

    &lt;VulnDiscussion&gt;Disabling Controller Area Network (CAN) protects the system against exploitation of any flaws in its implementation.&lt;/Vuln...
    Rule Medium Severity
  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must be configured to disable the FireWire kernel module.

    &lt;VulnDiscussion&gt;Disabling firewire protects the system against exploitation of any flaws in its implementation.&lt;/VulnDiscussion&gt;&lt;Fal...
    Rule Medium Severity
  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable the Stream Control Transmission Protocol (SCTP) kernel module.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable the Transparent Inter Process Communication (TIPC) kernel module.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
  • SRG-OS-000433-GPOS-00193

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution.

    &lt;VulnDiscussion&gt;Address space layout randomization (ASLR) makes it more difficult for an attacker to predict the location of attack code they...
    Rule Medium Severity
  • SRG-OS-000132-GPOS-00067

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable access to network bpf system call from nonprivileged processes.

    &lt;VulnDiscussion&gt;Loading and accessing the packet filters programs and maps using the bpf() system call has the potential of revealing sensiti...
    Rule Medium Severity
  • SRG-OS-000132-GPOS-00067

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must restrict usage of ptrace to descendant processes.

    &lt;VulnDiscussion&gt;Unrestricted usage of ptrace allows compromised binaries to run ptrace on other processes of the user. Like this, the attacke...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable core dump backtraces.

    &lt;VulnDiscussion&gt;A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable storing core dumps.

    &lt;VulnDiscussion&gt;A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable core dumps for all users.

    &lt;VulnDiscussion&gt;A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable acquiring, saving, and processing core dumps.

    &lt;VulnDiscussion&gt;A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must disable the use of user namespaces.

    &lt;VulnDiscussion&gt;User namespaces are used primarily for Linux containers. The value "0" disallows the use of user namespaces.&lt;/VulnDiscussi...
    Rule Medium Severity
  • SRG-OS-000433-GPOS-00192

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must implement nonexecutable data to protect its memory from unauthorized code execution.

    &lt;VulnDiscussion&gt;ExecShield uses the segmentation feature on all x86 systems to prevent execution in memory higher than a certain address. It ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The kdump service on RHEL 9 must be disabled.

    &lt;VulnDiscussion&gt;Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps consume a consid...
    Rule Medium Severity
  • SRG-OS-000366-GPOS-00153

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must ensure cryptographic verification of vendor software packages.

    &lt;VulnDiscussion&gt;Cryptographic verification of vendor software packages ensures that all software packages are obtained from a valid source an...
    Rule Medium Severity
  • SRG-OS-000366-GPOS-00153

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must check the GPG signature of software packages originating from external software repositories before installation.

    &lt;VulnDiscussion&gt;Changes to any software components can have significant effects on the overall security of the operating system. This require...
    Rule High Severity
  • SRG-OS-000366-GPOS-00153

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must check the GPG signature of locally installed software packages before installation.

    &lt;VulnDiscussion&gt;Changes to any software components can have significant effects on the overall security of the operating system. This require...
    Rule High Severity
  • SRG-OS-000366-GPOS-00153

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must have GPG signature verification enabled for all software repositories.

    &lt;VulnDiscussion&gt;Changes to any software components can have significant effects on the overall security of the operating system. This require...
    Rule High Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must be configured so that the cryptographic hashes of system files match vendor values.

    &lt;VulnDiscussion&gt;The hashes of important files like system executables should match the information given by the RPM database. Executables wit...
    Rule Medium Severity
  • SRG-OS-000437-GPOS-00194

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must remove all software components after updated versions have been installed.

    &lt;VulnDiscussion&gt;Previous versions of software components that are not removed from the information system after updates have been installed m...
    Rule Low Severity
  • SRG-OS-000366-GPOS-00153

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 subscription-manager package must be installed.

    &lt;VulnDiscussion&gt;The Red Hat Subscription Manager application manages software subscriptions and software repositories for installed software ...
    Rule Medium Severity
  • SRG-OS-000074-GPOS-00042

    <GroupDescription></GroupDescription>
    Group
  • RHEL 9 must not have a File Transfer Protocol (FTP) server package installed.

    &lt;VulnDiscussion&gt;The FTP service provides an unencrypted remote access that does not provide for the confidentiality and integrity of user pas...
    Rule High Severity

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