+Network Segmentation (macrosegmentation)
---+Security Management Subnets
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Network Segmentation (macrosegmentation)
Description
Mechanisms exist to implement network segmentation within network architectures to isolate Technology Assets, Applications and/or Services (TAAS) from other network resources.
Possible Solutions & Considerations
Micro-Small Business (<10 staff) / BLS Firm Size Classes 1-2
∙ Subnetting
∙ Virtual Local Area Network (VLAN)
Small Business (10-49 staff) / BLS Firm Size Classes 3-4
∙ Subnetting
∙ Virtual Local Area Network (VLAN)
Medium Business (50-249 staff) / BLS Firm Size Classes 5-6
∙ Subnetting
∙ Virtual Local Area Network (VLAN)
Large Business (250-999 staff) / BLS Firm Size Classes 7-8
∙ Subnetting
∙ Virtual Local Area Network (VLAN)
Enterprise (> 1,000 staff) / BLS Firm Size Class 9
∙ Subnetting
∙ Virtual Local Area Network (VLAN)
SCR-CMM
Level 0 Not Performed
Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.
Level 1 Performed Informally
SCR-CMM Level 1 criteria definitions are not available for this control:
▪ A reasonable person would conclude this control requires a structured process.
▪ At this level of maturity, the "ad hoc" nature of performing a capability informally would indicate the intent of the control is not met due to a lack of consistency and formality.
Level 2 Planned Tracked
Network Security (NET) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity.
▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are documented and maintained by process owners.
▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD).
▪ Network security-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines).
▪ Network security management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel.
▪ IT personnel define secure networking practices to protect the Confidentiality, Integrity, Availability and Safety (CIAS) of the organization's TAASD.
▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies.
▪ Network segmentation exists to implement separate network addresses (e.g., different subnets) to connect TAASD in different security domains (e.g., sensitive/regulated data environments).
▪ IT and/or cybersecurity architects maintain a segmented development network to ensure a secure development environment.
Level 3 Well Defined
Network Security (NET) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function.
▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are well-documented and kept current by process owners.
▪ A network security management team, or similar function, is appropriately staffed and supported to implement and maintain NET domain capabilities.
▪ Technology is leveraged to enhance the efficiency and accuracy of network security operations (e.g., network management solution and log aggregator).
▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls).
▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies.
▪ An implemented and operational capability exists to ensure network architecture utilizes network segmentation to isolate Technology Assets, Applications and/or Services (TAAS) to protect from other network resources.
Mechanisms exist to implement network segmentation within network architectures to isolate Technology Assets, Applications and/or Services (TAAS) from other network resources.
Level 4 Quantitatively Controlled
Network Security (NET) capabilities, in addition to being standardized across the entity and centrally managed to ensure consistency across Technology Assets, Applications, Services and/or Data (TAASD), efforts are metrics driven to provide sufficient insight for decision makers to predict optimal performance, ensure continued operations and/or identify areas for improvement. Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Applicable SCR-CMM Level 3 (Well Defined) capabilities are implemented and operational.
▪ Metrics reporting includes quantitative analysis of Key Performance Indicators (KPIs).
▪ Metrics reporting includes quantitative analysis of Key Risk Indicators (KRIs).
▪ Scope of metrics, KPIs and KRIs covers organization-wide cybersecurity and data protection controls, including functions performed by third-parties.
▪ Organizational leadership maintains a formal process to objectively review and respond to metrics, KPIs and KRIs (e.g., monthly or quarterly review).
▪ Based on metrics analysis, process improvement recommendations are submitted for review and are handled in accordance with change control processes.
▪ Business and technical stakeholders are involved in reviewing and approving proposed changes to evolve capabilities.
Level 5 Continuously Improving
Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions:
▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control.
▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies.
▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.
1. Übersicht
| Bezeichnung |
Standard |
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Security Management Subnets
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Description
Mechanisms exist to implement security management subnets to isolate security tools and support components from other internal system components by implementing separate subnetworks with managed interfaces to other components of the system.
Possible Solutions & Considerations
Micro-Small Business (<10 staff) / BLS Firm Size Classes 1-2
∙ Separate VLAN or network for management interfaces of firewall/switches where supported
Small Business (10-49 staff) / BLS Firm Size Classes 3-4
∙ Dedicated management VLAN for security tools and infrastructure devices
Medium Business (50-249 staff) / BLS Firm Size Classes 5-6
∙ Separate management network or VLAN for security management
Large Business (250-999 staff) / BLS Firm Size Classes 7-8
∙ Dedicated security management subnet
∙ Out-of-band management access controls
Enterprise (> 1,000 staff) / BLS Firm Size Class 9
∙ Enterprise out-of-band management network
∙ Dedicated jump servers
∙ Privileged access workstations (PAW)
SCR-CMM
Level 0 Not Performed
Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.
Level 1 Performed Informally
Network Security (NET) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include:
▪ Policies, standards & procedures associated with NET domain capabilities provide limited coverage due to the depth and breadth of the existing documentation.
▪ Network security-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices.
Level 2 Planned Tracked
Network Security (NET) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity.
▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are documented and maintained by process owners.
▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD).
▪ Network security-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines).
▪ Network security management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel.
▪ IT personnel define secure networking practices to protect the Confidentiality, Integrity, Availability and Safety (CIAS) of the organization's TAASD.
▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies.
▪ Processing and storage of service location, including a managed security zone to house cybersecurity and data protection tools.
Level 3 Well Defined
Network Security (NET) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function.
▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are well-documented and kept current by process owners.
▪ A network security management team, or similar function, is appropriately staffed and supported to implement and maintain NET domain capabilities.
▪ Technology is leveraged to enhance the efficiency and accuracy of network security operations (e.g., network management solution and log aggregator).
▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls).
▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies.
▪ An implemented and operational capability exists to implement security management subnets to isolate security tools and support components from other internal system components by implementing separate subnetworks with managed interfaces to other components of the system.
Level 4 Quantitatively Controlled
Network Security (NET) capabilities, in addition to being standardized across the entity and centrally managed to ensure consistency across Technology Assets, Applications, Services and/or Data (TAASD), efforts are metrics driven to provide sufficient insight for decision makers to predict optimal performance, ensure continued operations and/or identify areas for improvement. Capability criteria associated with this control reasonably expect the following criteria to exist:
▪ Applicable SCR-CMM Level 3 (Well Defined) capabilities are implemented and operational.
▪ Metrics reporting includes quantitative analysis of Key Performance Indicators (KPIs).
▪ Metrics reporting includes quantitative analysis of Key Risk Indicators (KRIs).
▪ Scope of metrics, KPIs and KRIs covers organization-wide cybersecurity and data protection controls, including functions performed by third-parties.
▪ Organizational leadership maintains a formal process to objectively review and respond to metrics, KPIs and KRIs (e.g., monthly or quarterly review).
▪ Based on metrics analysis, process improvement recommendations are submitted for review and are handled in accordance with change control processes.
▪ Business and technical stakeholders are involved in reviewing and approving proposed changes to evolve capabilities.
Level 5 Continuously Improving
Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions:
▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control.
▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies.
▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.
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1.1 Referenzen
1.2 Identifizierte Anforderungen
1.3 Zugehörige Regulierungen
2. Identifizierte Anforderungen
Anforderungen
| Quelle |
Anforderung |
3. Zugehörige Regulierungen
Regulierungen
| Quelle |
Regulierung |
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EULAW
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Artikel 13 Management der Netzwerksicherheit
Artikel 13
Management der Netzwerksicherheit
Die Finanzunternehmen entwickeln, dokumentieren und implementieren im Rahmen der Schutzvorkehrungen, die die Sicherheit der Netzwerke gegen Eindringen und Missbrauch von Daten gewährleisten, Richtlinien, Verfahren, Protokolle und Tools für das Management der Netzwerksicherheit, in denen alle folgenden Aspekte behandelt werden:
a)
die Trennung und Segmentierung von IKT-Systemen und -Netzwerken unter Berücksichtigung
i)
der Kritikalität oder Bedeutung der Funktion, die von diesen IKT-Systemen und -Netzwerken unterstützt wird,
ii)
der im Einklang mit Artikel 8 Absatz 1 der Verordnung (EU) 2022/2554 festgelegten Klassifizierung,
iii)
des Gesamtrisikoprofils der IKT-Assets, die diese IKT-Systeme und -Netzwerke nutzen;
b)
die Dokumentation aller Netzwerkverbindungen und Datenflüsse des Finanzunternehmens;
c)
die Nutzung eines gesonderten und speziellen Netzwerks für die Verwaltung von IKT-Assets;
d)
die Ermittlung und Implementierung von Kontrollen für den Netzwerkzugang, um Verbindungen zum Netzwerk des Finanzunternehmens durch ein nicht zugelassenes Gerät oder System oder einen Endpunkt, der die Sicherheitsanforderungen des Finanzunternehmens nicht erfüllt, zu verhindern und zu erkennen;
e)
die Verschlüsselung von Netzwerkverbindungen über Unternehmensnetzwerke, öffentliche Netzwerke, inländische Netzwerke, Netzwerke Dritter und drahtlose Netzwerke für die verwendeten Kommunikationsprotokolle unter Berücksichtigung der Ergebnisse der genehmigten Datenklassifizierung, der Ergebnisse der IKT-Risikobewertung und der Verschlüsselung von Netzwerkverbindungen gemäß Artikel 6 Absatz 2;
f)
die Konzeption der Netzwerke im Einklang mit den vom Finanzunternehmen festgelegten IKT-Sicherheitsanforderungen unter Berücksichtigung führender Praktiken zur Gewährleistung der Vertraulichkeit, Integrität und Verfügbarkeit des Netzwerks;
g)
die Sicherung des Netzwerkverkehrs zwischen den internen Netzwerken und dem Internet und anderen externen Verbindungen;
h)
die Ermittlung der Aufgaben und Verantwortlichkeiten sowie der Etappen für die Spezifikation, Implementierung, Genehmigung, Änderung und Überprüfung der Firewall-Regeln und Verbindungsfilter;
i)
die Überprüfung der Netzwerkarchitektur und des Konzepts für die Netzwerksicherheit einmal jährlich und für Kleinstunternehmen in regelmäßigen Abständen, um potenzielle Schwachstellen zu ermitteln;
j)
die Maßnahmen zur vorübergehenden Isolierung von Teilnetzwerken sowie von Netzwerkkomponenten und -geräten, soweit erforderlich;
k)
die Implementierung einer sicheren Konfigurationsbasis für alle Netzwerkkomponenten und die Absicherung des Netzwerks und der Netzwerkgeräte im Einklang mit etwaigen Anweisungen des Anbieters und gegebenenfalls mit Normen im Sinne des Artikels 2 Nummer 1 der Verordnung (EU) Nr. 1025/2012 sowie führenden Praktiken;
l)
die Verfahren zur Begrenzung, Sperrung und Beendigung von System- und Fernsitzungen nach einer bestimmten Inaktivitätszeit;
m)
für Vereinbarungen über Netzwerkdienstleistungen:
i)
die Ermittlung und Spezifikation von IKT- und Informationssicherheitsmaßnahmen, der Dienstleistungsgüte und von Managementanforderungen für alle Netzwerkdienste;
ii)
die Feststellung, ob diese Dienstleistungen von einem gruppeninternen IKT-Dienstleister oder von IKT-Drittdienstleistern erbracht werden.
Für die Zwecke von Buchstabe h überprüfen die Finanzunternehmen regelmäßig die Firewall-Regeln und die Verbindungsfilter im Einklang mit der gemäß Artikel 8 Absatz 1 der Verordnung (EU) 2022/2554 festgelegten Klassifizierung und dem Gesamtrisikoprofil der beteiligten IKT-Systeme. Bei IKT-Systemen, die kritische oder wichtige Funktionen unterstützen, überprüfen Finanzunternehmen mindestens alle sechs Monate, ob die bestehenden Firewall-Regeln und Verbindungsfilter angemessen sind.
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Verknüpfte Vorgänge
- Secure Controls Framework -
"The SCF is the Common Controls Framework™ (CCF), the world's most comprehensive cybersecurity and data privacy metaframework - it is also free to use. The entire concept is building secure, compliant and resilient capabilities in the most efficient and cost-effective manner possible.
The SCF is more than just a unified control catalog, since its included content creates a playbook for Governance, Risk & Compliance (GRC) capabilities. Used globally by organizations of every size, the SCF is a robust and scalable solution for security, compliance and resilience controls. As a comprehensive security framework, the SCF maps 1,400+ controls across 200+ laws, regulations, and industry frameworks so you can implement once and comply everywhere.
Like it or not, cybersecurity is a protracted war on an asymmetric battlefield, where the threats are everywhere and as defenders we have to make the effort to work together to help improve cybersecurity and data privacy practices, since we all suffer when massive data breaches occur or when cyber attacks have physical impacts. Hackers share information on attack methods with other hackers, so why shouldn’t the good guys share information on how to best protect an organization? We decided to take action and make a difference, since we feel it is too important to wait for someone else to fix the problems that exist.
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