Dr. Bhavani Thuraisingham The University of Texas at Dallas (UTD) July 2011

1. Dr. Bhavani ThuraisinghamThe University of Texas at Dallas (UTD)July 2011 Applications Development Security

2. Domain Agenda • System Lifecycle Security • Applications Security Issues • Database Security

3. Secure Systems Development Policies • Organizations require more secure development • Security climate has changes

4. Organizational Standards • Systems Security Engineering-Compatibility Maturity Model Integration (SSE-CMMI) • Web Application Security Consortium (WASC) • Build Security in (BSI) • International Organization for Standardization (ISO)/ International Electro-Technical Commission (IEC 27034)

5. Software Configuration Management (SCM) • Versioning • Technologist • Protection of code • Protection of project • Scope-creep Vs. Statement of work • Process integrity

6. System Lifecycle • Project • Management-based methodology • Capability maturity model integration • SLC vs. SDLC • System lifecycle • System development lifecycle

7. Project Management Controls • Complexity of systems and projects • Controls built into software

8. Secure Development Environment • “We need security? Then we’ll use SSL.” • “We need strong authentication? PKI will solve all our problems.” • “We use a secret/military-grad encryption.” • “We had a hacking contest and no one broke it.” • “We have an excellent firewall.” • “We’ll add it later; let’s have the features first.”

9. Secure Development: Physical • Protect source code • From tampering • Pirating • Accidental loss • Protection against attacks

10. Personnel Security • Hiring controls • Changes in employment • Protection of privacy from employees • Privacy impact rating

11. Separation of Test Datafrom Production • Never test on a production system • Never use real data

12. Software Development Methods • Waterfall • Spiral method • Clean-room • Structured Programming Development • Iterative development • Joint analysis development • Prototyping

13. Software Development Methods (cont.) • Modified prototype model • Exploratory model • Rapid application development • Reuse model • Computer aided software engineering • Component-based development • Extreme programming • Agile development

14. Programming Language Examples Interpreted • REXX • PostScript • Perl • Ruby • Python Compiled • Fortran • COBOL • BASIC • Pascal • C • Ada • C++ • Java • C# • Visual Basic

15. Program Utilities • Assembler • Compiler • Interpreter

16. Secure Coding Issues • Buffer overflow • SQL injections • Cross-site scripting XSS • Dangling pointer • Invalid hyperlink • Secure web applications • JavaScript attacks vs. sandbox • Application Programming Interface (API) • Open Source

17. Application Security Principles • Validate all input and output • Fail secure (closed) • Fail safe • Make it simple • Defense in depth • Only as secure as your weakest link

18. Object-oriented Programming • OOP concepts • Classes • Objects • Message • Inheritance • Polymorphism • Polyinstantiation

19. Domain Agenda • System Lifecycle Security • Applications Security Issues • Database Security

20. Applications Security Issues • Building security in • Adding defense-in-depth

21. Transaction Processing • Transaction • Integrity • Availability • Confidentiality

22. Malware and Attack Types • Injection • Input manipulation / malicious file execution • Brouthentication management • Cryptographic • Denial of service • Hijacking • Information disclosure • Infrastructure • Mis-configuration • Race condition

23. Malware • Keystroke logging • Adware and spyware • SPAM • Phishing • Botnets • Remote access Trojan • URL manipulation • Maintenance hooks • Privileged programs

24. Distributed Programming • Distributed Component Object Model (DCOM) • Simple Object Access Protocol (SOAP) • Common Object-Request Broker Architecture (CORBA) • Enterprise Java Beans (EJB)

25. Domain Agenda • System Lifecycle Security • Applications Security Issues • Database Security

26. Database Security • Database and data warehousing environment • Eliminate duplication of data • Consistency of data • Network access

27. Database Management Systems (DBMS) Models • Hierarchical DBMS • Stores records in a single table • Parent/child relationships • Limited to a single tree • Difficult to link branches

28. Relational DBMS Model • Most frequently used model • Data are structured in tables • Columns are “variables” (attributes) • Rows contain the specific instances (records) or data

29. Data Warehouse • Consolidated view of enterprise data • Data mart • Designed to support decision making through data mining

30. Knowledge Discovery in Databases (KDD) • Methods of identifying patterns in data • KDD and AI techniques • Probabilistic models • Statistical approach • Classification approach • Deviation and trend analysis • Neural networks • Expert system approach • Hybrid approach

31. Database Security Issues • Inference • Aggregation • Unauthorized access • Improper modification of data • Metadata • Query attacks • Bypass attacks • Interception of data • Web security • Data contamination • Polyinstantiation • Data mining

32. Database Controls • Access controls • Grants • Cascading permissions • Lock controls • Backup and recovery

33. View-based Access Controls • Constrained views • Sensitive data is hidden from unauthorized users • Controls located in the front-end application (user interface)

34. Transaction Controls • Content-based access control • Commit statement • Three-phase commit • Database rollback • Journal / logs • Error controls

35. The ACID Test • Atomicity • Consistency • Isolation • Durability

36. Application and Database Languages: Security Issues • Poorly designed • More privileges than necessary • DBA account use • Lack of audit • Input validation

37. Database Interface Languages • Structured Query Language (SQL) • Open Database Connectivity (ODBC) • Extensible Markup Language (XML) • Object Linking and Embedding (OLE) • Active X Data Object (ADO)