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input-field-finder

Spiders the domain of a single URL or a set or URLs and prints out all <input> elements found on the given domain and scheme (http/https).

Why?

Input fields are the most common vector/sink for web application vulnerabilities. I wrote this tool to help automate the reconnaissance phase when testing web applications for security vulnerabilities.

Usage

This is a command-line tool. Use the following flags to run the program:

  • -urls: URL or comma-separated list of URLs to search. The domain and scheme will be used as the whitelist.
  • -url-file: The location (relative or absolute path) of a file of newline-separated URLs to search.
  • -concurrency: The level of concurrency in network requests and internal data processing. 0 - 5; 0 = no concurrency, 5 = very high level of concurrency. Default value of 3.
  • -v: Enable verbose logging to the console.
  • -vv: Enable doubly-verbose logging to the console.

Examples:

  • input-field-finder -urls=http://www.example.com/: Searches www.example.com using the http scheme.
  • input-field-finder -urls=https://www.example.com/: Searches www.example.com using the https scheme.
  • input-field-finder -urls=http://127.0.0.1/: Searches 127.0.0.1 using the http scheme.
  • input-field-finder -urls=http://127.0.0.1:8080/: Searches 127.0.0.1 using the http scheme, on port 8080.
  • input-field-finder -concurrency=0 -urls=http://127.0.0.1:8080/: Searches 127.0.0.1 using the http scheme, on port 8080, with no concurrency.
  • input-field-finder -concurrency=5 -urls=http://127.0.0.1:8080/: Searches 127.0.0.1 using the http scheme, on port 8080, with a very high level of concurrency.
  • input-field-finder -urls=http://127.0.0.1,http://www.example.com: Searches 127.0.0.1 and www.example.com using the http scheme, on port 8080.
  • input-field-finder -url-file=/root/urls.txt: Searches the URLs found in the file located at the absolute path of /root/urls.txt.
  • input-field-finder -url-file=urls.txt: Searches the URLs found in the url.txt file located in the current directory.
  • input-field-finder -v -urls=http://www.example.com/example/: Searches www.example.com using the http scheme, starting at the /example/ path, with verbose logging.
  • input-field-finder -vv -urls=http://www.example.com/example/page/1?id=2#heading: Searches www.example.com using the http scheme, starting at the /example/page/1 path, with a query of id=2, the #heading URL fragment, with verbose logging.

Binaries

The program has been written in Go, and as such can be compiled to all the common platforms in use today. The following architectures have been compiled, and can be found in the releases tab:

  • Windows amd64
  • Windows 386
  • Linux amd64
  • Linux 386
  • OSX amd64
  • OSX 386

Alternatively, you can compile the code yourself. See Dave Cheney's excellent post on the topic.

Planned Improvements

  1. Ability to pass multiple URLs in the -url flag.
  2. Ability to pass in a file of URLs.
  3. "Cookie jar" functionality for authenticated scans.
  4. Ability to pass in a file of blacklist URLs (regex values?)
  5. Support for single-page applications (SPA), by rendering JavaScript in pages, and THEN parsing the responses.