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Software Assurance Metrics and Tool Evaluation

Software Assurance Metrics and Tool Evaluation. Paul E. Black National Institute of Standards and Technology http://www.nist.gov/ paul.black@nist.gov. Outline. Introduction SRD project SAMATE project structure Future – where do we go now?. Good Software. Good Checking.

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Software Assurance Metrics and Tool Evaluation

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  1. Software Assurance Metrics and Tool Evaluation Paul E. Black National Institute of Standards and Technology http://www.nist.gov/ paul.black@nist.gov

  2. Outline • Introduction • SRD project • SAMATE project structure • Future – where do we go now? Paul E. Black

  3. Good Software Good Checking Good Development What is Software Assurance? • Activities that ensures that software processes and products conform to requirements. • after NASA Software Assurance Guidebook • Two legs of good software • Good Development • Good Checking • Testing (dynamic) • Analysis (static) Paul E. Black

  4. NIST’s role • What is NIST? • A non-regulatory agency in Dept. of Commerce • 3,000 employees in Maryland and Colorado • Primarily research, not funding • Why NIST? • Over a century of experience in standards and measurement • Involved in security: DES, AES, NVLAP, etc. • Trusted, neutral 3rd party Paul E. Black

  5. The Two Projects SAMATE Software Assurance Metrics And Tool Evaluation SRD Standard Reference Dataset Paul E. Black

  6. Outline • Introduction • SRD project • SAMATE project structure • Future – where do we go now? Paul E. Black

  7. SRD Project Goals • Identify classes of security flaws and vulnerabilities • Identify classes of software security assessment techniques • Document state of the art • Develop a Standard Reference Dataset (SRD) of clean programs and programs with security flaws Paul E. Black

  8. SRD Characteristics • Small test cases for each flaw Separate “can detect” from speed issues • Flawed programs and their clean counterparts • Very large test cases Confirm speed and maximum size • Test cases taken from actual code Nobody can say it would never happen • Many different subsets Java, C, web app, OS, Windows, Unix, etc. • Ongoing development and additions • Submissions from NIST, researchers, & vendors • Readily usable Paul E. Black

  9. SRD Project Plans • Small workshop http://samate.nist.gov/softSecToolsSOA • 10 & 11 August at NIST • Publish proceedings as NIST Special Publication & put in ACM Digital Library • Write journal article on • classes of known software security vulnerabilities and • the state of the art of security SA tools Paul E. Black

  10. Outline • Introduction • SRD project • SAMATE project structure • Future – where do we go now? Paul E. Black

  11. DHS Software Assurance Plan 1. PEOPLE (Education/Training) Software Developer focused training and education 2. PROCESS (Lifecycle, Best Practices, Standards) Security throughout the Software Development Life Cycle 3. TECHNOLOGY (Tools and R&D) SA tools identification, enhancement, and development 4. ACQUISITION (SOW / Procurement language) Embed security requirements in procurement stage Paul E. Black

  12. The SAMATE Project http://samate.nist.gov/ • Compendiums (ongoing) • Tools • Researchers and companies • Workshops • Aids for tool evaluation • Software metrics Paul E. Black

  13. Workshops • Taxonomy of SA functions and techniques • Approach (code vs. spec, static vs. dynamic) • Software type (distributed, real time, secure) • Type of fault detected • Which are the most “important”? • Highest cost/benefit ratio? • Finds highest priority vulnerabilities? • Identify gaps in SA functions and write research agenda • Plan and initiate studies for metrics first workshop in Long Beach, Nov, w/ASE Paul E. Black

  14. Purposes of SA Tool Evaluations • Precisely document what a tool does (and doesn’t) do … in order to … • Provide feedback to tool developers • Simple changes to make • Directions for future releases • Inform users • Match the tool to a particular situation • Understand significance of tool results • Guide research for next tool generation Paul E. Black

  15. Developing a Specification • After tool function selection approved by working group, … • NIST develops a specification for the function with focus group input • Spec posted to web for public comment • NIST develops the tests • Detailed plans • Scripts • Standard Reference Dataset Paul E. Black

  16. Outline • Introduction • SRD project • SAMATE project structure • Future – where do we go now? Paul E. Black

  17. Toward Software Metrics • Qualitative comparison • Formally defined quantity • Unit and scale • Measured value • Derived units Paul E. Black

  18. Tool Effectiveness Metrics • Do they really find vulnerabilities and catch bugs? • In other words, how much assurance does running a tool provide? • “Create studies and experiments to measure the effectiveness of tools” Paul E. Black

  19. Call for Participation • Define classes of flaws and vulnerabilities • Contribute to collections of tools, researchers, … • Help define classes of SA functions • Decide order of importance of functions • Participate in focus group to specify a function • Contribute to standard reference dataset • Develop metrics to assess software and tools • Help set research agenda Paul E. Black

  20. Society has 3 options: • Learn how to make software that works • Limit size or authority of software • Accept failing software Paul E. Black

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