Secure Programming: the Seven Pernicious Kingdoms

The best way to improve software security is to study past security errors and prevent them, say the authors of this authoritative book on secure software programming.

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"Success is foreseeing failure."

—Henry Petroski

In this overview of Secure Programming with Static Analysis:

Introduction: Improving Software Security

Defensive Programming Is Not Enough

The Quality Fallacy

Static Analysis in the Big Picture

Classifying Vulnerabilities

The Seven Pernicious Kingdoms

Secure Programming: Summary

Improving Software Security: Introduction

We believe that the most effective way to improve software security is to study past security errors and prevent them from happening in the future. In fact, that is the primary theme of this book. In the following chapters, we look at a variety of programming tasks and examine the common security pitfalls associated with them. Our philosophy is similar to that of Henry Petroski: To build a strong system, you have to understand how the system is likely to fail [Petroski, 1985]. Mistakes are inevitable, but you have a measure of control over your mistakes. Although you can’t have precise knowledge of your next blunder, you can control the set of possibilities. You can also control where, when, and by whom your mistake will be found. This book focuses on finding mistakes that manifest themselves in source code. In particular, it concentrates on mistakes that lead to security problems, which can be both tricky to uncover and costly to ignore.

secure programming code

"Secure Programming With Static Analysis" learn more

Being aware of common pitfalls might sound like a good way to avoid falling prey to them, but awareness by itself often proves to be insufficient. Children learn the spelling rule “i before e except after c,” but widespread knowledge of the rule does not prevent believe from being a commonly misspelled word. Understanding security is one thing; applying your understanding in a complete and consistent fashion to meet your security goals is quite another. For this reason, we advocate static analysis as a technique for finding common security errors in source code. Throughout the book, we show how static analysis tools can be part of a strategy for getting security right.

The term static analysis refers to any process for assessing code without executing it. Static analysis is powerful because it allows for the quick consideration of many possibilities. A static analysis tool can explore a large number of “what if” scenarios without having to go through all the -computations necessary to execute the code for all the scenarios. Static analysis is particularly well suited to security because many security problems occur in corner cases and hard-to-reach states that can be difficult to exercise by actually running the code. Good static analysis tools provide a fast way to get a consistent and detailed evaluation of a body of code.

Advanced static analysis tools are not yet a part of the toolkit that most programmers use on a regular basis. To explain why they should be, we begin by looking at why some commonly used approaches to security typically fail. We discuss defensive programming, software security versus security features, and mistaking software quality efforts for software security efforts. Of course, no single tool or technique will ever provide a complete solution to the security problem by itself. We explain where static analysis fits into the big picture and then end the chapter by categorizing the kinds of mistakes that most often jeopardize software security.

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