Pro PHP Security, 2nd Edition: From Application Security by Chris Snyder, Thomas Myer, Michael Southwell

By Chris Snyder, Thomas Myer, Michael Southwell

Hypertext Preprocessor defense, similar to Hypertext Preprocessor itself, has complex. up-to-date for personal home page 5.3, the 2d version of this authoritative Hypertext Preprocessor safeguard e-book covers foundational Hypertext Preprocessor protection subject matters like SQL injection, XSS, consumer authentication, and safe personal home page improvement. Chris Snyder and Tom Myer additionally delve into fresh advancements like cellular defense, the impression of JavaScript, and the benefits of fresh Hypertext Preprocessor hardening efforts. professional Hypertext Preprocessor protection, moment version will function your entire advisor for taking protecting and proactive safety features inside of your personal home page functions. novices in safe programming will discover a lot of fabric on safe Hypertext Preprocessor improvement, the fundamentals of encryption, safe protocols, in addition to easy methods to reconcile the calls for of server-side and net program safeguard.

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Extra resources for Pro PHP Security, 2nd Edition: From Application Security Principles to the Implementation of XSS Defenses

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We discuss this issue at length in Chapter 5. Another set of metacharacters includes those that have special meaning in database queries: ' " ; \ Depending on how the query is structured and executed, these characters could be used to inject additional SQL statements into the query, and possibly execute additional, arbitrary queries. SQL injection is the subject of Chapter 3. There is another group of characters that are not easy to type, and not so obviously dangerous, but that could represent a threat to your system and databases.

The same thing goes for security. If you can look at a piece of code and figure out what it does in a minute, it’s a lot easier to secure it than if it takes you half an hour to figure out what it does. Furthermore, if you have a single function you can reuse anywhere in your application, then it’s easier to secure that function than to try to secure every single time you use bare code. info CHAPTER 1 ■ WHY IS SECURE PROGRAMMING A CONCERN? Another pain point is when developers don’t understanding (or know about) the core native functions of PHP.

Filenames have length limits. Filesystem utilities that receive too much input may either continue after silently truncating the desired name (with probably disastrous results), or crash. • Buffer overflow is of course the primary danger with too-long input, though thankfully not within PHP itself. A buffer overflow occurs when a user enters a quantity of data larger than the amount of memory allocated by an application to receive it. The end of the data overflows into the memory following the end of the buffer, with the following possible results: • An existing variable might be overwritten.

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