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VPM-08.2: Software Patch Integrity

VPM 9 — Critical Protect

Mechanisms exist to ensure software and/or firmware patches are: (1) Obtained from trusted sources; and (2) Checked for integrity.

Renumbered: Formerly VPM-05.8 in SCF 2025.4.

Control Question: Does the organization ensure software and/or firmware patches are: (1) Obtained from trusted sources; and (2) Checked for integrity?

General (3)
Framework Mapping Values
IEC 62443-2-1 2024 COMP 3.1
SWIFT CSF 2025 2.2
UL 2900-2-2 2016 11.4
US (1)
Framework Mapping Values
USA Federal FFIEC ITEH 2016 II.C.10.d
EMEA (2)
Framework Mapping Values
EMEA EU NIS2 Annex 2024 6.6.1(c)
EMEA Saudi Arabia OTCC-1 2022 2-4-1-15
APAC (2)

Capability Maturity Model

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

Vulnerability & Patch Management (VPM) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with VPM domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Attack Surface Management (ASM)-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

Vulnerability & Patch Management (VPM) 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 VPM domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with VPM 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 VPM domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Vulnerability management-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Vulnerability management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel.

Level 3 — Well Defined

Vulnerability & Patch Management (VPM) 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 VPM 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 VPM domain capabilities are well-documented and kept current by process owners. ▪ A vulnerability management team, or similar function, is appropriately staffed and supported to implement and maintain VPM domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of vulnerability management operations (e.g., patch management solution and vulnerability scanning solution). ▪ 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 VPM 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). ▪ An implemented and operational capability exists to ensure software and/or firmware patches are: (1) Obtained from trusted sources; and (2) Checked for integrity.

Level 4 — Quantitatively Controlled

Utilize SCR-CMM Level 3 criteria definitions: ▪ There are no defined Level 4 criteria, since it is reasonable to assume a quantitatively-controlled process is not necessary to operationalize this control. ▪ While it may be possible to develop “metrics-driven” capabilities for this control, the criteria would be organization-specific to define.

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.

Assessment Objectives

  1. VPM-08.2_A01 software and/or firmware patches are obtained from trusted sources.
  2. VPM-08.2_A02 software and/or firmware patches are checked for integrity.

Technology Recommendations

Micro/Small

  • Verify patch integrity before installing (check hash/signature)

Small

  • Patch integrity verification policy
  • Check digital signatures before installation

Medium

  • Formal patch integrity verification process
  • Cryptographic signature verification

Large

  • Enterprise patch integrity verification program
  • Automated signature checking

Enterprise

  • Enterprise patch management with automated integrity verification (e.g., SCCM, Tanium)
  • Cryptographic signature enforcement

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