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III - Administrative Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000071-GPOS-00039

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must enforce password complexity by requiring that at least one numeric character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Low Severity
  • SRG-OS-000072-GPOS-00040

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must require the change of at least 8 characters when passwords are changed.

    &lt;VulnDiscussion&gt;If the Ubuntu operating system allows the user to consecutively reuse extensive portions of passwords, this increases the cha...
    Rule Low Severity
  • SRG-OS-000073-GPOS-00041

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must encrypt all stored passwords with a FIPS 140-2 approved cryptographic hashing algorithm.

    &lt;VulnDiscussion&gt;Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are...
    Rule Medium Severity
  • SRG-OS-000074-GPOS-00042

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must not have the telnet package installed.

    &lt;VulnDiscussion&gt;Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are...
    Rule High Severity
  • SRG-OS-000075-GPOS-00043

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must enforce 24 hours/1 day as the minimum password lifetime. Passwords for new users must have a 24 hours/1 day minimum password lifetime restriction.

    &lt;VulnDiscussion&gt;Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enfo...
    Rule Low Severity
  • SRG-OS-000076-GPOS-00044

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must enforce a 60-day maximum password lifetime restriction. Passwords for new users must have a 60-day maximum password lifetime restriction.

    &lt;VulnDiscussion&gt;Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the ...
    Rule Low Severity
  • SRG-OS-000077-GPOS-00045

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must prohibit password reuse for a minimum of five generations.

    &lt;VulnDiscussion&gt;Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute...
    Rule Low Severity
  • SRG-OS-000078-GPOS-00046

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must enforce a minimum 15-character password length.

    &lt;VulnDiscussion&gt;The shorter the password, the lower the number of possible combinations that need to be tested before the password is comprom...
    Rule Medium Severity
  • SRG-OS-000120-GPOS-00061

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must employ a FIPS 140-2 approved cryptographic hashing algorithms for all created and stored passwords.

    &lt;VulnDiscussion&gt;The Ubuntu operating system must use a FIPS-compliant hashing algorithm to securely store the password. The FIPS-compliant ha...
    Rule Medium Severity
  • SRG-OS-000380-GPOS-00165

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must allow the use of a temporary password for system logons with an immediate change to a permanent password.

    &lt;VulnDiscussion&gt;Without providing this capability, an account may be created without a password. Non-repudiation cannot be guaranteed once an...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00225

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

    &lt;VulnDiscussion&gt;If the Ubuntu operating system allows the user to select passwords based on dictionary words, then this increases the chances...
    Rule Medium Severity
  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must require users to re-authenticate for privilege escalation and changing roles.

    &lt;VulnDiscussion&gt;Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When the U...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00225

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu Operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Medium Severity
  • SRG-OS-000138-GPOS-00069

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must set a sticky bit on all public directories to prevent unauthorized and unintended information transferred via shared system resources.

    &lt;VulnDiscussion&gt;Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of infor...
    Rule Medium Severity
  • SRG-OS-000205-GPOS-00083

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

    &lt;VulnDiscussion&gt;Any operating system providing too much information in error messages risks compromising the data and security of the structu...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure the /var/log directory to be group-owned by syslog.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure the /var/log directory to be owned by root.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure the /var/log directory to have mode 0755 or less permissive.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure the /var/log/syslog file to be group-owned by adm.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure /var/log/syslog file to be owned by syslog.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure /var/log/syslog file with mode 0640 or less permissive.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
  • SRG-OS-000256-GPOS-00097

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure audit tools with a mode of 0755 or less permissive.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
  • SRG-OS-000256-GPOS-00097

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure audit tools to be owned by root.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
  • SRG-OS-000256-GPOS-00097

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system must configure the audit tools to be group-owned by root.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
  • SRG-OS-000259-GPOS-00100

    <GroupDescription></GroupDescription>
    Group
  • The Ubuntu operating system library files must have mode 0755 or less permissive.

    &lt;VulnDiscussion&gt;If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented...
    Rule Medium Severity

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