I - Mission Critical Public
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000355-GPOS-00143
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must, for networked systems, compare internal information system clocks at least every 24 hours with a server synchronized to one of the redundant United States Naval Observatory (USNO) time servers, or a time server designated for the appropriate DOD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS).
<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...Rule Low Severity -
SRG-OS-000356-GPOS-00144
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must synchronize internal information system clocks to the authoritative time source when the time difference is greater than one second.
<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...Rule Low Severity -
SRG-OS-000359-GPOS-00146
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC).
<VulnDiscussion>If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analys...Rule Low Severity -
SRG-OS-000142-GPOS-00071
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must be configured to use TCP syncookies.
<VulnDiscussion>DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot ac...Rule Medium Severity -
SRG-OS-000423-GPOS-00187
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must have SSH installed.
<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected commu...Rule High Severity -
SRG-OS-000423-GPOS-00187
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must use SSH to protect the confidentiality and integrity of transmitted information.
<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected commu...Rule High Severity -
SRG-OS-000023-GPOS-00006
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must display the Standard Mandatory DOD Notice and Consent Banner before granting any local or remote connection to the system.
<VulnDiscussion>Display of a standardized and approved use notification before granting access to the publicly accessible operating system en...Rule Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must not allow unattended or automatic login via SSH.
<VulnDiscussion>Failure to restrict system access to authenticated users negatively impacts Ubuntu 22.04 LTS security.</VulnDiscussion>...Rule High Severity -
SRG-OS-000126-GPOS-00066
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.
<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personn...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
<GroupDescription></GroupDescription>Group -
Ubuntu 22.04 LTS must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.
<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personn...Rule Medium Severity
Node 2
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