The article discusses capabilities and application of Nmap Scripting Engine for the purpose of vulnerability scanning. By adapting code snippets covered here, you will be able to quickly develop, scan and generate reports for new vulnerabilities without waiting for mainstream scanners. Read more.
nmap (Network MAPper) is a network port scanner with service version and operating system detection engines. The tool was originally developed by Fyodor and published in Phrack Issue 51 in 1997. The tool is command line although a number of GUIs exist. nmap runs on a variety of platforms including Linux, *BSD, Windows, and others. Read more.
TLS/SSL protocols support a large number of cipher suites. A cipher suite is a collection of symmetric and asymmetric encryption algorithms used by hosts to establish a secure communication. Supported cipher suites can be classified based on encryption algorithm strength, key length, key exchange and authentication mechanisms. Some cipher suites offer better level of security than others (e.g. Several weak cipher suites were developed for export to comply with US export law). There are more than 200 known cipher suites. Read more.
The field of password cracking has evolved by leaps an bounds over the last decade with the introduction of new cracking techniques, more advanced software and significantly faster hardware. One area which I find most fascinating is rule-based cracking. An attacker can develop a set of word mangling rules (e.g. substitute all 'a's to '@'s, upper-case every third letter, etc.) in order to attack non-random passwords which use slightly modified dictionary words. The purpose of this research is to develop an automated method of analyzing a large body of leaked passwords in order to come up with a list of frequently used words and rules to make up passwords. Read more.
Oracle Listener serves as a main communication point for the database. It provides necessary abstraction to host's transport protocols in order to allow Oracle's higher level session protocols to function across multiple platforms. This article covers different commands used to interact with the TNS Listener as well as common attacks against it. Read more.
A solution to the exercise in the Corelan article Root Cause Analysis - Integer Overflows on exploiting integer and heap overflows. The solution illustrates massaging the heap into a vulnerable state by corrupting the Windows front-end allocator and finally exploiting it to gain arbitrary code execution. Read more.
Heap Overflows For Humans is a series of articles by Steven Seeley that explore heap exploitation on Windows. In this article I will go over the exact reasoning and exploitation steps for an exercise created by Steven in the second article of the series. Read more.
A walkthrough for the Mystery Box Buffer Overflow challenge in the Open Security Training - Introductory x86 class. Read more.
A solution to an exercise in Corelan Tutorial 10 on writing DEP and ASLR bypassing exploits. The solution illustrates grabbing leaked kernel32 address from memory, calculating an offset to VirtualProtect() and at last setting up a ROP chain to make a memory location with shellcode executable. Read more.
A solution to a small exercise in Corelan's Tutorial 9 on writing Windows 32-bit shellcode. The solution illustrates some techniques in removing null-bytes from a sample shellcode as well as a few tricks to keep the shellcode modular and easy to modify. Read more.
A collection of techniques on Windows SEH exploitation. Specifically the article covers methods of reliable exploit development by getting from a successfully overwritten pointer to Exception Handler (SEH) to the pointer to the Next Exception Handler (NSEH) struct. Read more.
Exploit Exercises' Protostar wargame includes a number of carefully prepared exercises to help hone your basic exploitation skills. The final portion of the wargame combines Stack, Format String, Heap, and Network exploitation techniques into three excellent challenges to help solidify knowledge gained from previous exercises. Read more.
Exploit Exercises' Protostar wargame includes a number of carefully prepared exercises to help hone your basic exploitation skills. In this walkthrough I will go over the format string exploitation portion of the wargame. Read more.
Open Security Training's Introduction to Software Exploits course has a number of vulnerability examples designed to illustrate unconventional exploitation techniques. One such example is an uninitialized variable condition which may be exploitable under certain conditions. The following walkthrough goes into the exact exploitation steps for this class of vulnerabilities. Read more.
A walkthrough for the Secret Phase of the Bomb Lab covered in Open Security Training's Introduction to Reverse Engineering class. Read more.
Crackmes.de has a nice of collection crackmes, fun and educational challenges useful for honing your reversing skills. Looking at the latest submissions section there was a recently published Crackme by nlxx rated at difficulty 2. In this guide I will go over the static analysis based solution to this crackme and explain how to write a key generator. Read more.