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David Waltermire (david.waltermire@nist) Presenting for: Harold Booth (harold.booth@nist)

A Model for Exchanging Vulnerability Information draft-booth-sacm-vuln-model-01 http://datatracker.ietf.org/doc/draft-booth-sacm-vuln-model/. David Waltermire (david.waltermire@nist.gov) Presenting for: Harold Booth (harold.booth@nist.gov). What is it?.

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David Waltermire (david.waltermire@nist) Presenting for: Harold Booth (harold.booth@nist)

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  1. A Model for Exchanging Vulnerability Informationdraft-booth-sacm-vuln-model-01http://datatracker.ietf.org/doc/draft-booth-sacm-vuln-model/ David Waltermire (david.waltermire@nist.gov) Presenting for: Harold Booth (harold.booth@nist.gov)

  2. What is it? • An XML-based data format that enables the exchange of structured information related to vulnerabilities • A revision to the current Vulnerability Data Model v2.0 used by the National Vulnerability Database • Feeds downloaded by academia, security tool vendors, industry and other vulnerability databases

  3. What information does it capture? • Community and proprietary vulnerability identifiers (e.g. Common Vulnerability and Exposures (CVE), vendors ids, vulnerability database identifiers) • Captures relationships within the same identification system (e.g. supersession, deprecation) • Identifies aliases between different identification systems • Uses the Common Platform Enumeration (CPE) to relate vulnerable product configurations • Application • Operating system • Application running on operating system • Plugs-in Common Vulnerability Scoring System (CVSS) v2 scoring information • Allows other scoring systems to be used • Relates a vulnerability to references: • Vulnerability advisories, alerts and bulletins describing the vulnerability in greater detail • Patch and work-around information • Assessment methods

  4. How does it relate to the IETF?Security Automation and Continuous Monitoring (SACM) Use Case 1: System State Assessment (draft-waltermire-sacm-use-cases-02) • Vulnerability Management Use Case (4.1.2.2) • Enumerates technical assessment methods • Assessment Result Analysis (4.1.3) • Provides vulnerability scores enabling comparison/weighting of assessment results • Supports Risk-based decision making • Content management (4.1.4) • Captures scoring models and vulnerability information • References additional vulnerability and patch information

  5. How does it relate to the IETF? (Cont’d)Security Automation and Continuous Monitoring (SACM) Use Case 3: Security Control Verification and Monitoring (draft-waltermire-sacm-use-cases-02) • Tasking and Scheduling (4.3.1) • Selection of assessment criteria • Defining in-scope assets (i.e. targeting) • Data Aggregation and Reporting (4.3.2) • Enables correlation by vulnerability identifiers and other vulnerability attributes (e.g.. scores, product)

  6. How does it relate to the IETF? (Cont’d)Managed Incident Lightweight Exchange (MILE WG) IODEF-extension to support structured cybersecurity information (draft-ietf-mile-sci-05) • Section 4.3.3: Vulnerability • Enables inclusion of information for (candidate) vulnerabilities related to incidents or events • Possible candidate for inclusion in the IANA registry (Appendix II)

  7. Possible work / How you can help? • Greater consensus on use cases for vulnerability format • Collaboration/integration with other related efforts (e.g. Common Vulnerability Reporting Format (CVRF)) • Update model to reflect growing consensus • Develop an IANA registry for pluggable components • Allow for additional product identification schemes (e.g. ISO/IEC 19770-2 Software ID Tags) • Support multiple scoring metrics/methods (e.g. CVSSv3) • Extensible reference types • Should it be extended to hold patch information? • Product/version applicability • Patch location information • How to install (i.e. exact command-line or execution instructions) • JSON vs. XML

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