Linux is an open-source operating system (OS). An operating system is software that directly manages a system’s hardware and resources, like CPU, memory, and storage. The OS sits between applications and hardware and makes the connections between all of your software and the physical resources that do the work. Here, at https://blog.eduguru.in, We will discuss and solve real-life problems coming on Linux OS. We also know more interesting features of Linux here.
As with any kind of application, a web application is dependent on the other layers of the technology stack that support it, including the web server, operating system, and networking infrastructure. Any of these components may be targeted by an attacker, and compromising the technology on which an application depends will very often enable an … Read more
Buffer overflow vulnerabilities occur when an application copies user-controllable data into a memory buffer that is not sufficiently large to accommodate it. The destination buffer is overflowed, resulting in adjacent memory being overwritten with the user’s data. Depending on the nature of the vulnerability, an attacker may be able to exploit it to execute arbitrary … Read more
The barriers to automation described previously lead to a number of specific technical challenges that must be addressed in the creation of an effective vulnerability scanner. These challenges impinge not only upon the scanner’s ability to detect specific types of vulnerability, as already described, but also upon its ability to perform the core tasks of … Read more
A number of different tools exist for performing automated vulnerability scans of web applications. These scanners have the benefit of being able to test a large amount of functionality in a relatively short time, and in a typical application are often able to identify a variety of important vulnerabilities. Web application vulnerability scanners automate several … Read more
A Bytecode Example Though you may not realize it, you have already seen an example of bytecode or at least its human readable format. The output generated by the javap command when we ran it with the -c flag contained a disassembly of each of the methods in the class file. Let’s consider now the … Read more
We said that the constant pool contains a great deal of information. In fact it contains an interesting mixture of items. The constant pool combines the function of a symbol table for linking purposes as well as a repository for constant values and string literals present in the source code. It may be considered as … Read more
The class file contains a lot more information than its cousin, the executable file. Of course, it still contains the same type of information: program requirements, an identifier indicating that this is a program and executable code (bytecode, in this case). However, it also contains some very rich information about the original source code. The … Read more
Moving back to the world of Java, we see that it is a high-level programming language and that bytecode is the low-level machine language of the JVM. Java is an object-oriented language; that is, it deals primarily with objects and their interrelationships. Objects are best thought of in this context as a collection of data … Read more
The Traditional Development Life Cycle Java is a compiled language. That is, source code is written in a high-level language and then converted through a process of compilation to a machine-level language, the Java bytecode, which then runs on the Java Virtual Machine (JVM). Before we look more closely at Java bytecode. Program files are … Read more
Understanding how the various components of the Java Virtual Machine (JVM) cooperate to provide a secure execution environment will enable you to understand how to administer your own security policy using the new features of Java 2 and to know when you should consider implementing your own extensions to provide a more tailored security policy. … Read more