Dharma – Generation-based Context-free Grammar Fuzzing Tool


Dharma is a tool used to create test cases for fuzzing of structured text inputs, such as markup and script. It takes a custom high-level grammar format as input, and produces random well-formed test cases as output – it can be used as a grammar fuzzing tool.

API programming is complex and subtle programming mistakes in new code can introduce annoying crashes and even serious security vulnerabilities that can be triggered by malformed input which can lead to headaches for the user and security exposure.

Dharma - Generation-based Context-free Grammar Fuzzing Tool

WebAPIs start life as a specification in the form of an Interface Description Language, or IDL. Since this is essentially a grammar, a grammar-based fuzzer becomes a valuable tool in finding security issues in new WebAPIs because it ensures that expected semantics are followed most of the time, while still exploring enough undefined behaviour to produce interesting results.

Features

  • Persistent variable tracking and cross-reference support
  • Intuitive cross-referencing and meta function syntax
  • Automatic leaf node bias after deep graph recursions
  • Internal constant overriding for greater configurability
  • Templated prefix and suffix outputs

Apart from the original features listed above the guys from Mozilla dragged Dharma out of 2012 and gave it a good working over. They improved the way it parses grammars and optimized the speed of parsing and the generating of fuzzed output, added new grammar features to the grammar specification, added support for serving testcases over a WebSocket server, and made it Python 3 ready.

Usage

Generate a single test-case.

Generate a single test case with multiple grammars.

Generating test-cases as files.

You can download Dharma here:

Dharma-v1.1.zip

Or read more here.

Posted in: Exploits/Vulnerabilities, Hacking Tools, Secure Coding

, , ,


Latest Posts:


Axiom - Pen-Testing Server For Collecting Bug Bounties Axiom – Pen-Testing Server For Collecting Bug Bounties
Project Axiom is a set of utilities for managing a small dynamic infrastructure setup for bug bounty, basically a pen-testing server out of the box with 1-line.
Quasar RAT - Windows Remote Administration Tool Quasar RAT – Windows Remote Administration Tool
Quasar is a fast and light-weight Windows remote administration tool coded in C#. Used for user support through day-to-day administrative work to monitoring.
Pingcastle - Active Directory Security Assessment Tool Pingcastle – Active Directory Security Assessment Tool
PingCastle is a Active Directory Security Assessment Tool designed to quickly assess the Active Directory security level based on a risk and maturity framework.
Second Order - Subdomain Takeover Scanner Tool Second Order – Subdomain Takeover Scanner Tool
Second Order Subdomain Takeover Scanner Tool scans web apps for second-order subdomain takeover by crawling the application and collecting URLs (and other data)
Binwalk - Firmware Security Analysis & Extraction Tool Binwalk – Firmware Security Analysis & Extraction Tool
Binwalk is a fast and easy to use Python-based firmware security analysis tool that allows for firmware analysis, reverse engineering & extracting of firmware.
zBang - Privileged Account Threat Detection Tool zBang – Privileged Account Threat Detection Tool
zBang is a risk assessment tool for Privileged Account Threat Detection on a scanned network, organizations & red teams can use it to identify attack vectors


Comments are closed.