I - Mission Critical Classified
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000015-ALG-000016
Group -
The Sentry must enforce approved authorizations for logical access to information and system resources by enabling identity-based, role-based, and/or attribute-based security policies. These controls are enabled in MobileIron UEM (MobileIron Core) and applied by the Sentry for conditional access enforcement.
Successful authentication through Sentry must not automatically give an entity access to resources behind Sentry. The lack of authorization-based access control could result in the immediate compro...Rule Medium Severity -
SRG-NET-000018-ALG-000017
Group -
The Sentry must enforce approved authorizations for controlling the flow of information within the network based on attribute-based inspection of the source, destination, and headers, of the communications traffic.
Information flow control regulates where information is allowed to travel within a network. The flow of all network traffic must be monitored and controlled so it does not introduce any unacceptabl...Rule Medium Severity -
SRG-NET-000019-ALG-000018
Group -
The Sentry must restrict or block harmful or suspicious communications traffic by controlling the flow of information between interconnected networks based on attribute- and content-based inspection of the source, destination, headers, and/or content of the communications traffic.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. Blocking or restricting detected harmful or suspicious communications...Rule Medium Severity -
SRG-NET-000062-ALG-000011
Group -
The Sentry providing intermediary services for remote access communications traffic must use encryption services that implement NIST FIPS-validated cryptography to protect the confidentiality of remote access sessions.
Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DoD nonpublic information s...Rule Medium Severity -
SRG-NET-000062-ALG-000092
Group -
If Sentry stores secret or private keys, it must use FIPS-approved key management technology and processes in the production and control of private/secret cryptographic keys.
Private key data is used to prove that the entity presenting a public key certificate is the certificate's rightful owner. Compromise of private key data allows an adversary to impersonate the key ...Rule Medium Severity -
SRG-NET-000062-ALG-000150
Group -
The Sentry that provides intermediary services for TLS must be configured to comply with the required TLS settings in NIST SP 800-52.
SP 800-52 provides guidance on using the most secure version and configuration of the TLS/SSL protocol. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the g...Rule Medium Severity -
SRG-NET-000063-ALG-000012
Group -
The Sentry providing intermediary services for remote access communications traffic must use NIST FIPS-validated cryptography to protect the integrity of remote access sessions.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access is access to DoD-nonpublic information systems by an authorized user ...Rule Medium Severity -
SRG-NET-000074-ALG-000043
Group -
The Sentry must produce audit records containing information to establish what type of events occurred.
Without establishing what type of event occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be nece...Rule Low Severity -
SRG-NET-000075-ALG-000044
Group -
The Sentry must produce audit records containing information to establish when (date and time) the events occurred.
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment, ...Rule Low Severity -
SRG-NET-000076-ALG-000045
Group -
The Sentry must produce audit records containing information to establish where the events occurred.
Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment,...Rule Low Severity -
SRG-NET-000077-ALG-000046
Group -
The Sentry must produce audit records containing information to establish the source of the events.
Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify...Rule Low Severity -
SRG-NET-000078-ALG-000047
Group -
The Sentry must produce audit records containing information to establish the outcome of the events.
Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the ne...Rule Low Severity -
SRG-NET-000079-ALG-000048
Group -
The Sentry must generate audit records containing information to establish the identity of any individual or process associated with the event.
Without information that establishes the identity of the subjects (i.e., users or processes acting on behalf of users) associated with the events, security personnel cannot determine responsibility...Rule Low Severity -
SRG-NET-000088-ALG-000054
Group -
The Sentry must send an alert to, at a minimum, the ISSO and SCA when an audit processing failure occurs.
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an ...Rule Low Severity -
SRG-NET-000132-ALG-000087
Group -
The Sentry 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.
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types); organizations must disable...Rule Medium Severity -
SRG-NET-000138-ALG-000088
Group -
The Sentry providing mobile device access control intermediary services must be configured with a pre-established trust relationship and mechanisms with appropriate authorities (e.g., Active Directory or AAA server) which validate mobile device account access authorizations and privileges.
User account and privilege validation must be centralized in order to prevent unauthorized access using changed or revoked privileges. ALGs can implement functions such as traffic filtering, authe...Rule Medium Severity -
SRG-NET-000138-ALG-000089
Group -
The Sentry providing mobile device authentication intermediary services must restrict mobile device authentication traffic to specific authentication server(s).
User authentication can be used as part of the policy filtering rule sets. Some URLs or network resources can be restricted to authenticated users only. Users are prompted by the application or bro...Rule Medium Severity -
SRG-NET-000140-ALG-000094
Group -
The Sentry providing mobile device authentication intermediary services must use multifactor authentication for network access to non-privileged accounts.
To ensure accountability and prevent unauthenticated access, non-privileged users must utilize multifactor authentication to prevent potential misuse and compromise of the system. Multifactor auth...Rule Medium Severity -
SRG-NET-000147-ALG-000095
Group -
The Sentry providing mobile device authentication intermediary services must implement replay-resistant authentication mechanisms for network access to nonprivileged accounts.
A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authenticator and the application validating the user credentials must not be ...Rule Medium Severity -
SRG-NET-000164-ALG-000100
Group -
The Sentry that provides intermediary services for TLS must validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation.
A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA). Certification path validation is necessary for a relying party to make...Rule Medium Severity -
SRG-NET-000166-ALG-000101
Group -
The Sentry providing PKI-based mobile device authentication intermediary services must map authenticated identities to the mobile device account.
Authorization for access to any network element requires an approved and assigned individual account identifier. To ensure only the assigned individual is using the account, the account must be bou...Rule Medium Severity -
SRG-NET-000213-ALG-000107
Group -
The Sentry must terminate all network connections associated with a communications session at the end of the session, or as follows: for in-band management sessions (privileged sessions), the session must be terminated after 10 minutes of inactivity; and for mobile device sessions (non-privileged session), the session must be terminated after 15 minutes of inactivity.
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port th...Rule Medium Severity -
SRG-NET-000334-ALG-000050
Group -
The Sentry must offload audit records onto a centralized log server.
Without the capability to select a user session to capture or view, investigations into suspicious or harmful events would be hampered by the volume of information captured. The intent of this req...Rule Low Severity -
SRG-NET-000339-ALG-000090
Group -
The Sentry providing mobile device authentication intermediary services must implement multifactor authentication for remote access to nonprivileged accounts such that one of the factors is provided by a device separate from the system gaining access.
For remote access to nonprivileged accounts, the purpose of requiring a device that is separate from the information system gaining access for one of the factors during multifactor authentication i...Rule Medium Severity -
SRG-NET-000355-ALG-000117
Group -
The Sentry providing mobile device authentication intermediary services using PKI-based mobile device authentication must only accept end entity certificates issued by DoD PKI or DoD-approved PKI Certification Authorities (CAs) for the establishment of protected sessions.
Non-DoD-approved PKIs have not been evaluated to ensure they have security controls and identity vetting procedures in place that are sufficient for DoD systems to rely on the identity asserted in ...Rule Medium Severity
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