II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000046-GPOS-00022
Group -
NixOS must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.
If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.Rule Medium Severity -
SRG-OS-000046-GPOS-00022
Group -
NixOS must take action when allocated audit record storage volume reaches 90 percent of the repository maximum audit record storage capacity.
If security personnel are not notified immediately when storage volume reaches 90 percent utilization, they are unable to plan for audit record storage capacity expansion.Rule Medium Severity -
SRG-OS-000047-GPOS-00023
Group -
The NixOS audit system must take appropriate action when the audit storage volume is full.
It is critical that when NixOS is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures...Rule Medium Severity -
SRG-OS-000047-GPOS-00023
Group -
The NixOS audit system must take appropriate action when an audit processing failure occurs.
It is critical that when NixOS is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures...Rule Medium Severity -
SRG-OS-000051-GPOS-00024
Group -
NixOS must have the packages required for offloading audit logs installed and running.
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. Ni...Rule Medium Severity -
SRG-OS-000051-GPOS-00024
Group -
The NixOS audit records must be off-loaded onto a different system or storage media from the system being audited.
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. Ni...Rule Medium Severity -
SRG-OS-000051-GPOS-00024
Group -
NixOS must authenticate the remote logging server for off-loading audit logs.
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. Ni...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS audit daemon must generate logs that are group-owned by root.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS audit directory and logs must be owned by root to prevent unauthorized read access.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS audit directory and logs must be group-owned by root to prevent unauthorized read access.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS audit log directory must have a mode of 0700 or less permissive.
Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit recor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS audit logs must have a mode of 0600 or less permissive.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS syslog directory and logs must be owned by root to prevent unauthorized read access.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS syslog directory and logs must be group-owned by root to prevent unauthorized read access.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS syslog log directory must have a mode of 0750 or less permissive.
Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit recor...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
NixOS syslog logs must have a mode of 0640 or less permissive.
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platfor...Rule Medium Severity -
SRG-OS-000058-GPOS-00028
Group -
NixOS audit system must protect login UIDs from unauthorized change.
If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. Audit information includ...Rule Medium Severity -
SRG-OS-000063-GPOS-00032
Group -
NixOS system configuration files must have a mode of "0644" or less permissive.
Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured a...Rule Medium Severity -
SRG-OS-000063-GPOS-00032
Group -
NixOS system configuration file directories must have a mode of "0755" or less permissive.
Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured a...Rule Medium Severity -
SRG-OS-000063-GPOS-00032
Group -
NixOS system configuration files and directories must be owned by root.
Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured a...Rule Medium Severity -
SRG-OS-000063-GPOS-00032
Group -
NixOS system configuration files and directories must be group-owned by root.
Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured a...Rule Medium Severity -
SRG-OS-000066-GPOS-00034
Group -
NixOS, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.
Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entit...Rule Medium Severity -
SRG-OS-000067-GPOS-00035
Group -
NixOS must enforce authorized access to the corresponding private key for PKI-based authentication.
If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the network infrastructure. The cornerstone of the PKI is the private key use...Rule Medium Severity -
SRG-OS-000069-GPOS-00037
Group -
NixOS must enforce password complexity by requiring that at least one uppercase character be used.
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...Rule Medium Severity -
SRG-OS-000070-GPOS-00038
Group -
NixOS must enforce password complexity by requiring that at least one lowercase character be used.
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...Rule Medium Severity
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