"There are a number of secure programming books on the market, but none that go as deep as this one. The depth and detail exceeds all books that I know about by an order of magnitude." -Halvar Flake, CEO and head of research, SABRE Security GmbH The Definitive Insider's Guide to Auditing Software Security This is one of the most detailed, sophisticated, and useful guides to software security auditing ever written. The authors are leading security consultants and researchers who have personally uncovered vulnerabilities in applications ranging from sendmail to Microsoft Exchange, Check Point VPN to Internet Explorer. Drawing on their extraordinary experience, they introduce a start-to-finish methodology for "ripping apart" applications to reveal even the most subtle and well-hidden security flaws. The Art of Software Security Assessment covers the full spectrum of software vulnerabilities in both UNIX/Linux and Windows environments. It demonstrates how to audit security in applications of all sizes and functions, including network and Web software. Moreover, it teaches using extensive examples of real code drawn from past flaws in many of the industry's highest-profile applications. Coverage includes * Code auditing: theory, practice, proven methodologies, and secrets of the trade * Bridging the gap between secure software design and post-implementation review * Performing architectural assessment: design review, threat modeling, and operational review * Identifying vulnerabilities related to memory management, data types, and malformed data * UNIX/Linux assessment: privileges, files, and processes * Windows-specific issues, including objects and the filesystem * Auditing interprocess communication, synchronization, and state * Evaluating network software: IP stacks, firewalls, and common application protocols * Auditing Web applications and technologies This book is an unprecedented resource for everyone who must deliver secure software or assure the safety of existing software: consultants, security specialists, developers, QA staff, testers, and administrators alike. Contents ABOUT THE AUTHORS xv PREFACE xvii ACKNOWLEDGMENTS xxi I Introduction to Software Security Assessment 1 SOFTWARE VULNERABILITY FUNDAMENTALS 3 2 DESIGN REVIEW 25 3 OPERATIONAL REVIEW 67 4 APPLICATION REVIEW PROCESS 91 II Software Vulnerabilities 5 MEMORY CORRUPTION 167 6 C LANGUAGE ISSUES 203 7 PROGRAM BUILDING BLOCKS 297 8 STRINGS ANDMETACHARACTERS 387 9 UNIX I: PRIVILEGES AND FILES 459 10 UNIX II: PROCESSES 559 11 WINDOWS I: OBJECTS AND THE FILE SYSTEM 625 12 WINDOWS II: INTERPROCESS COMMUNICATION 685 13 SYNCHRONIZATION AND STATE 755 III Software Vulnerabilities in Practice 14 NETWORK PROTOCOLS 829 15 FIREWALLS 891 16 NETWORK APPLICATION PROTOCOLS 921 17 WEB APPLICATIONS 1007 18 WEB TECHNOLOGIES 1083 BIBLIOGRAPHY 1125 INDEX 1129