**Foreword by Avi Rubin. How does software break? How do attackers make software break on purpose? Why are firewalls, intrusion detection systems, and antivirus software not keeping out the bad guys? What tools can be used to break software? This book provides the answers. This book is studded with examples of real attacks, attack patterns, tools, and techniques used by bad guys to break software. If you want to protect your software from attack, you must first learn how real attacks are really carried out. Learn about: Why software exploit will continue to be a serious problem; When network security mechanisms do not work; Attack patterns; Reverse engineering; Classic attacks against server software; Surprising attacks against client software; Techniques for crafting malicious input; The technical details of buffer overflows; and Rootkits. This information needs to be understood and digested by security professionals so that they know the magnitude of the problem and they can begin to address it properly. Today, all developers should be security-minded. The knowledge here will arm you with a real understanding of the software security problem.