I - Mission Critical Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000057
<GroupDescription></GroupDescription>Group -
The operating system must protect audit information from unauthorized read access.
<VulnDiscussion>Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confide...Rule Medium Severity -
SRG-OS-000058
<GroupDescription></GroupDescription>Group -
The operating system must protect audit information from unauthorized modification.
<VulnDiscussion>If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malic...Rule Medium Severity -
SRG-OS-000059
<GroupDescription></GroupDescription>Group -
The operating system must protect audit information from unauthorized deletion.
<VulnDiscussion>If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malic...Rule Medium Severity -
SRG-OS-000062
<GroupDescription></GroupDescription>Group -
The operating system must provide audit record generation capability for DoD-defined auditable events for all operating system components.
<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...Rule Medium Severity -
SRG-OS-000063
<GroupDescription></GroupDescription>Group -
The operating system must allow only the ISSM (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.
<VulnDiscussion>Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel ma...Rule Medium Severity -
SRG-OS-000064
<GroupDescription></GroupDescription>Group -
The operating system must generate audit records when successful/unsuccessful attempts to access privileges occur.
<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficu...Rule Medium Severity -
SRG-OS-000066
<GroupDescription></GroupDescription>Group -
The operating system, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.
<VulnDiscussion>Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate n...Rule Medium Severity -
SRG-OS-000067
<GroupDescription></GroupDescription>Group -
The operating system, for PKI-based authentication, must enforce authorized access to the corresponding private key.
<VulnDiscussion> If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the n...Rule Medium Severity -
SRG-OS-000068
<GroupDescription></GroupDescription>Group -
The operating system must map the authenticated identity to the user or group account for PKI-based authentication.
<VulnDiscussion>Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the indivi...Rule Medium Severity -
SRG-OS-000069
<GroupDescription></GroupDescription>Group -
The operating system must enforce password complexity by requiring that at least one upper-case character be used.
<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...Rule Medium Severity -
SRG-OS-000070
<GroupDescription></GroupDescription>Group -
The operating system must enforce password complexity by requiring that at least one lower-case character be used.
<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...Rule Medium Severity -
SRG-OS-000071
<GroupDescription></GroupDescription>Group -
The operating system must enforce password complexity by requiring that at least one numeric character be used.
<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...Rule Medium Severity -
SRG-OS-000072
<GroupDescription></GroupDescription>Group -
The operating system must require the change of at least 50% of the total number of characters when passwords are changed.
<VulnDiscussion> If the operating system allows the user to consecutively reuse extensive portions of passwords, this increases the chances o...Rule Medium Severity -
SRG-OS-000073
<GroupDescription></GroupDescription>Group -
The operating system must store only encrypted representations of passwords.
<VulnDiscussion>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-000074
<GroupDescription></GroupDescription>Group -
The operating system must transmit only encrypted representations of passwords.
<VulnDiscussion>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
<GroupDescription></GroupDescription>Group -
Operating systems must enforce 24 hours/1 day as the minimum password lifetime.
<VulnDiscussion>Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enfo...Rule Medium Severity -
SRG-OS-000076
<GroupDescription></GroupDescription>Group -
Operating systems must enforce a 60-day maximum password lifetime restriction.
<VulnDiscussion>Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the ...Rule Medium Severity -
SRG-OS-000077
<GroupDescription></GroupDescription>Group -
The operating system must prohibit password reuse for a minimum of five generations.
<VulnDiscussion>Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute...Rule Medium Severity -
SRG-OS-000078
<GroupDescription></GroupDescription>Group -
The operating system must enforce a minimum 15-character password length.
<VulnDiscussion>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-000079
<GroupDescription></GroupDescription>Group -
The operating system must obscure feedback of authentication information during the authentication process to protect the information from possible exploitation/use by unauthorized individuals.
<VulnDiscussion>To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback fr...Rule Medium Severity -
SRG-OS-000080
<GroupDescription></GroupDescription>Group -
The operating system must enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.
<VulnDiscussion>To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-ap...Rule Medium Severity -
SRG-OS-000095
<GroupDescription></GroupDescription>Group -
The operating system must be configured to disable non-essential capabilities.
<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...Rule Medium Severity -
SRG-OS-000096
<GroupDescription></GroupDescription>Group -
The operating system must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the PPSM CAL and vulnerability assessments.
<VulnDiscussion>In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e....Rule Medium Severity -
SRG-OS-000104
<GroupDescription></GroupDescription>Group -
The operating system must uniquely identify and must authenticate organizational users (or processes acting on behalf of organizational users).
<VulnDiscussion>To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...Rule Medium Severity -
SRG-OS-000105
<GroupDescription></GroupDescription>Group -
The operating system must use multifactor authentication for network access to privileged accounts.
<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor ...Rule Medium Severity
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