Elusive Thoughts

Introduction Nowadays hacking, as already mentioned in my previous articles, has been industrialized, meaning that professional hackers are constantly hired to make money out of practically anything and therefore all Web Application vulnerabilities have to be understood and defeated. This article is going to talk about what Cross Site Request Forgery (CSRF) is, explain how can someone perform a successful CSRF attack and describe how to amplify a CSRF attack (e.g. combine CSRF with other vulnerabilities). CSRF is an attack which forces an end user to execute unwanted actions on a web application in which he/she is currently authenticated (simplistically speaking). With a little help from social engineering (like sending a link via email/chat), an attacker may force the users of a web application to execute actions of the attacker's choosing. A successful CSRF exploit can compromise end user data and operation in case of a normal user. If the targeted end user is the administ...

Introduction This article is going to talk about performing Web Application security code reviews the proper way (also known as my way). The best approach to perform a Web Application security code review would be to have at your disposal the Web Application (uploaded and running in a Web Server) and of course the Web Application code itself, because you would be able to verify your findings in real time (e.g. exploit a Cross Site Scripting issue immediately after you identify the issue in the code). Ideally this happens within a CI/CD pipeline where your SAST tool flags a finding, and you can spin up a local or staging instance to validate whether that finding is actually exploitable — that feedback loop is where the real security value lives. But first lets define what is a security source code review. A security code review is a systematic examination of a Web Application source code that is intended to find and fix security mistakes overlooked in the initial development phas...

Introduction The purpose of this paper is to emphasize in the importance of cryptography, focus in RSA asymmetric cryptographic algorithm and explain: What is cryptography Why cryptography is important History of Cryptography Mathematical RSA operations How to perform an RSA brute-force What is Cryptography Cryptography (or cryptology; from Greek κρυπτός, kryptos, "hidden, secret"; and γράφω, gráphō, "I write", or -λογία, -logia, respectively) is the practice and study of hiding information. Modern cryptography intersects the disciplines of mathematics, computer science, and engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. [2] Until recently cryptography referred mostly to encryption, which is the process of converting ordinary information (plaintext) into unintelligible gibberish (i.e. cipher-text). [4]  Decryption is the reverse, in other words, moving from...