III - Administrative Classified
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000088
Group -
The ALG 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 Medium Severity -
SRG-NET-000098
Group -
The ALG must protect audit information from unauthorized read access.
Auditing and logging are key components of any security architecture. Logging the actions of specific events provides a means to investigate an attack, recognize resource utilization or capacity th...Rule Medium Severity -
SRG-NET-000099
Group -
The ALG must protect audit information from unauthorized modification.
If audit data were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit...Rule Medium Severity -
SRG-NET-000100
Group -
The ALG must protect audit information from unauthorized deletion.
If audit data were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit...Rule Medium Severity -
SRG-NET-000101
Group -
The ALG must protect audit tools from unauthorized access.
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on au...Rule Medium Severity -
SRG-NET-000102
Group -
The ALG must protect audit tools from unauthorized modification.
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on au...Rule Medium Severity -
SRG-NET-000103
Group -
The ALG must protect audit tools from unauthorized deletion.
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on au...Rule Medium Severity -
SRG-NET-000131
Group -
The ALG must not have unnecessary services and functions enabled.
Information systems are capable of providing a wide variety of functions (capabilities or processes) and services. Some of these functions and services are installed and enabled by default. The org...Rule Medium Severity -
SRG-NET-000131
Group -
The ALG must be configured to remove or disable unrelated or unneeded application proxy services.
Unrelated or unneeded proxy services increase the attack vector and add excessive complexity to the securing of the ALG. Multiple application proxies can be installed on many ALGs. However, proxy t...Rule Medium Severity -
SRG-NET-000132
Group -
The ALG 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
Group -
The ALG providing user authentication intermediary services must uniquely identify and authenticate organizational users (or processes acting on behalf of organizational users).
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users...Rule Medium Severity -
SRG-NET-000138
Group -
The ALG providing user 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 user 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
Group -
The ALG providing user authentication intermediary services must restrict user 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
Group -
The ALG providing user authentication intermediary services must use multifactor authentication for network access to non-privileged accounts.
To assure 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
Group -
The ALG providing user 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
Group -
The ALG 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
Group -
The ALG providing PKI-based user authentication intermediary services must map authenticated identities to the user 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-000169
Group -
The ALG providing user authentication intermediary services must uniquely identify and authenticate non-organizational users (or processes acting on behalf of non-organizational users).
Lack of authentication enables anyone to gain access to the network or possibly a network element that provides opportunity for intruders to compromise resources within the network infrastructure. ...Rule Medium Severity -
SRG-NET-000192
Group -
The ALG providing content filtering must block outbound traffic containing known and unknown DoS attacks to protect against the use of internal information systems to launch any Denial of Service (DoS) attacks against other networks or endpoints.
DoS attacks can take multiple forms but have the common objective of overloading or blocking a network or host to deny or seriously degrade performance. If the network does not provide safeguards a...Rule Medium Severity -
SRG-NET-000202
Group -
The ALG must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception).
A deny-all, permit-by-exception network communications traffic policy ensures that only those connections which are essential and approved are allowed. As a managed interface, the ALG must block a...Rule Medium Severity -
SRG-NET-000213
Group -
The ALG 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 user 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-000228
Group -
The ALG must detect, at a minimum, mobile code that is unsigned or exhibiting unusual behavior, has not undergone a risk assessment, or is prohibited for use based on a risk assessment.
Mobile code is defined as software modules obtained from remote systems, transferred across a network, and then downloaded and executed on a local system without explicit installation or execution ...Rule Medium Severity -
SRG-NET-000230
Group -
The ALG must protect the authenticity of communications sessions.
Authenticity protection provides protection against man-in-the-middle attacks/session hijacking and the insertion of false information into sessions. This requirement focuses on communications pro...Rule Medium Severity -
SRG-NET-000231
Group -
The ALG must invalidate session identifiers upon user logout or other session termination.
Captured sessions can be reused in "replay" attacks. This requirement limits the ability of adversaries from capturing and continuing to employ previously valid session IDs. Session IDs are tokens...Rule Medium Severity -
SRG-NET-000233
Group -
The ALG must recognize only system-generated session identifiers.
Network elements (depending on function) utilize sessions and session identifiers to control application behavior and user access. If an attacker can guess the session identifier, or can inject or ...Rule Medium Severity
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