By Marsel Nizamutdinov
ISBN-10: 1931769494
ISBN-13: 9781931769495
An outline and research of the vulnerabilities brought on by programming mistakes in internet purposes, this e-book is written from either from the attacker's and defense specialist's point of view. lined is detecting, investigating, exploiting, and taking out vulnerabilities in net functions in addition to mistakes equivalent to personal home page resource code injection, SQL injection, and XSS. the most typical vulnerabilities in Hypertext Preprocessor and Perl scripts and strategies of exploiting those weaknesses are defined, info on writing intersite scripts and safe platforms for the hosted websites, growing safe authorization structures, and bypassing authorization. exposed is how attackers can enjoy the hosted goal and why an it appears normal-working software could be weak.
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Extra resources for Hacker Web Exploition Uncovered
Example text
The Lack of Variable Initialization Consider a few more examples of programming errors in PHP scripts that could allow a remote user to obtain higher privileges in the system. One common error is the lack of initialization of variables before the first use of them. To be precise, this isn't a vulnerability, and in most cases the attacker cannot benefit from this. However, the lack of initialization can sometimes have dramatic consequences. The base for all vulnerabilities caused by the use of noninitialized variables is that, with certain settings of the PHP interpreter, the interpreter automatically registers GET, POST, and sometimes COOKIE parameters sent with HTTP requests.
Cgi line 17. Error fetch() without execute() Content-Type: text/html
This allows the attacker to suppose that the array can be initialized to other values. To understand how this can be done, consider another example. a[5]=hello. The text of the script is as follows:
Hacker Web Exploition Uncovered by Marsel Nizamutdinov
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