270 lines
11 KiB
Markdown
270 lines
11 KiB
Markdown
```
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/'___\ /'___\ /'___\
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/\ \__/ /\ \__/ __ __ /\ \__/
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\ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\
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\ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/
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\ \_\ \ \_\ \ \____/ \ \_\
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\/_/ \/_/ \/___/ \/_/
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```
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# ffuf - Fuzz Faster U Fool
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A fast web fuzzer written in Go.
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Heavily inspired by the great projects [gobuster](https://github.com/OJ/gobuster) and [wfuzz](https://github.com/xmendez/wfuzz).
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## Features
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- Fast!
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- Allows fuzzing of HTTP header values, POST data, and different parts of URL, including GET parameter names and values
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- Silent mode (`-s`) for clean output that's easy to use in pipes to other processes.
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- Modularized architecture that allows integration with existing toolchains with reasonable effort
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- Easy-to-add filters and matchers (they are interoperable)
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## Example cases
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### Typical directory discovery
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[](https://asciinema.org/a/211350)
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By using the FUZZ keyword at the end of URL (`-u`):
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```
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ffuf -w /path/to/wordlist -u https://target/FUZZ
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```
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### Virtual host discovery (without DNS records)
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[](https://asciinema.org/a/211360)
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Assuming that the default virtualhost response size is 4242 bytes, we can filter out all the responses of that size (`-fs 4242`)while fuzzing the Host - header:
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```
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ffuf -w /path/to/vhost/wordlist -u https://target -H "Host: FUZZ" -fs 4242
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```
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### GET parameter fuzzing
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GET parameter name fuzzing is very similar to directory discovery, and works by defining the `FUZZ` keyword as a part of the URL. This also assumes an response size of 4242 bytes for invalid GET parameter name.
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```
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ffuf -w /path/to/paramnames.txt -u https://target/script.php?FUZZ=test_value -fs 4242
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```
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If the parameter name is known, the values can be fuzzed the same way. This example assumes a wrong parameter value returning HTTP response code 401.
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```
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ffuf -w /path/to/values.txt -u https://target/script.php?valid_name=FUZZ -fc 401
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```
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### POST data fuzzing
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This is a very straightforward operation, again by using the `FUZZ` keyword. This example is fuzzing only part of the POST request. We're again filtering out the 401 responses.
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```
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ffuf -w /path/to/postdata.txt -X POST -d "username=admin\&password=FUZZ" https://target/login.php -fc 401
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```
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### Using external mutator to produce test cases
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For this example, we'll fuzz JSON data that's sent over POST. [Radamsa](https://gitlab.com/akihe/radamsa) is used as the mutator.
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When `--input-cmd` is used, ffuf will display matches as their position. This same position value will be available for the callee as an environment variable `$FFUF_NUM`. We'll use this position value as the seed for the mutator. Files example1.txt and example2.txt contain valid JSON payloads. We are matching all the responses, but filtering out response code `400 - Bad request`:
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```
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ffuf --input-cmd 'radamsa --seed $FFUF_NUM example1.txt example2.txt' -H "Content-Type: application/json" -X POST -u https://ffuf.io.fi/ -mc all -fc 400
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```
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It of course isn't very efficient to call the mutator for each payload, so we can also pre-generate the payloads, still using [Radamsa](https://gitlab.com/akihe/radamsa) as an example:
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```
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# Generate 1000 example payloads
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radamsa -n 1000 -o %n.txt example1.txt example2.txt
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# This results into files 1.txt ... 1000.txt
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# Now we can just read the payload data in a loop from file for ffuf
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ffuf --input-cmd 'cat $FFUF_NUM.txt' -H "Content-Type: application/json" -X POST -u https://ffuf.io.fi/ -mc all -fc 400
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```
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## Usage
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To define the test case for ffuf, use the keyword `FUZZ` anywhere in the URL (`-u`), headers (`-H`), or POST data (`-d`).
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```
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Usage of ./ffuf:
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-D DirSearch style wordlist compatibility mode. Used in conjunction with -e flag. Replaces %EXT% in wordlist entry with each of the extensions provided by -e.
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-H "Name: Value"
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Header "Name: Value", separated by colon. Multiple -H flags are accepted.
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-V Show version information.
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-X string
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HTTP method to use (default "GET")
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-ac
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Automatically calibrate filtering options
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-acc value
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Custom auto-calibration string. Can be used multiple times. Implies -ac
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-b "NAME1=VALUE1; NAME2=VALUE2"
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Cookie data "NAME1=VALUE1; NAME2=VALUE2" for copy as curl functionality.
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Results unpredictable when combined with -H "Cookie: ..."
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-c Colorize output.
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-compressed
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Dummy flag for copy as curl functionality (ignored) (default true)
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-cookie value
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Cookie data (alias of -b)
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-d string
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POST data
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-data string
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POST data (alias of -d)
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-data-ascii string
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POST data (alias of -d)
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-data-binary string
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POST data (alias of -d)
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-debug-log string
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Write all of the internal logging to the specified file.
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-e string
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Comma separated list of extensions to apply. Each extension provided will extend the wordlist entry once.
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-fc string
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Filter HTTP status codes from response. Comma separated list of codes and ranges
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-fl string
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Filter by amount of lines in response. Comma separated list of line counts and ranges
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-fr string
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Filter regexp
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-fs string
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Filter HTTP response size. Comma separated list of sizes and ranges
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-fw string
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Filter by amount of words in response. Comma separated list of word counts and ranges
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-i Dummy flag for copy as curl functionality (ignored) (default true)
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-input-cmd value
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Command producing the input. --input-num is required when using this input method. Overrides -w.
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-input-num int
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Number of inputs to test. Used in conjunction with --input-cmd. (default 100)
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-k TLS identity verification
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-mc string
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Match HTTP status codes from respose, use "all" to match every response code. (default "200,204,301,302,307,401,403")
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-ml string
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Match amount of lines in response
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-mode string
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Multi-wordlist operation mode. Available modes: clusterbomb, pitchfork (default "clusterbomb")
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-mr string
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Match regexp
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-ms string
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Match HTTP response size
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-mw string
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Match amount of words in response
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-o string
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Write output to file
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-of string
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Output file format. Available formats: json, ejson, html, md, csv, ecsv (default "json")
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-p delay
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Seconds of delay between requests, or a range of random delay. For example "0.1" or "0.1-2.0"
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-r Follow redirects
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-s Do not print additional information (silent mode)
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-sa
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Stop on all error cases. Implies -sf and -se
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-se
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Stop on spurious errors
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-sf
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Stop when > 95% of responses return 403 Forbidden
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-t int
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Number of concurrent threads. (default 40)
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-timeout int
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HTTP request timeout in seconds. (default 10)
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-u string
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Target URL
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-v Verbose output, printing full URL and redirect location (if any) with the results.
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-w value
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Wordlist file path and (optional) custom fuzz keyword, using colon as delimiter. Use file path '-' to read from standard input. Can be supplied multiple times. Format: '/path/to/wordlist:KEYWORD'
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-x string
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HTTP Proxy URL
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```
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eg. `ffuf -u https://example.org/FUZZ -w /path/to/wordlist`
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## Installation
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- [Download](https://github.com/ffuf/ffuf/releases/latest) a prebuilt binary from [releases page](https://github.com/ffuf/ffuf/releases/latest), unpack and run!
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or
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- If you have go compiler installed: `go get github.com/ffuf/ffuf`
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The only dependency of ffuf is Go 1.11. No dependencies outside of Go standard library are needed.
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## Changelog
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- master
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- New
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- Changed
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- v0.12
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- New
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- Added a new flag to select a multi wordlist operation mode: `--mode`, possible values: `clusterbomb` and `pitchfork`.
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- Added a new output file format eJSON, for always base64 encoding the input data.
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- Redirect location is always shown in the output files (when using `-o`)
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- Full URL is always shown in the output files (when using `-o`)
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- HTML output format got [DataTables](https://datatables.net/) support allowing realtime searches, sorting by column etc.
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- New CLI flag `-v` for verbose output. Including full URL, and redirect location.
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- SIGTERM monitoring, in order to catch keyboard interrupts an such, to be able to write `-o` files before exiting.
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- Changed
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- Fixed a bug in the default multi wordlist mode
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- Fixed JSON output regression, where all the input data was always encoded in base64
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- `--debug-log` no correctly logs connection errors
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- Removed `-l` flag in favor of `-v`
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- More verbose information in banner shown in startup.
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- v0.11
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- New
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- New CLI flag: -l, shows target location of redirect responses
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- New CLI flac: -acc, custom auto-calibration strings
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- New CLI flag: -debug-log, writes the debug logging to the specified file.
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- New CLI flags -ml and -fl, filters/matches line count in response
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- Ability to use multiple wordlists / keywords by defining multiple -w command line flags. The if no keyword is defined, the default is FUZZ to keep backwards compatibility. Example: `-w "wordlists/custom.txt:CUSTOM" -H "RandomHeader: CUSTOM"`.
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- Changed
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- New CLI flag: -i, dummy flag that does nothing. for compatibility with copy as curl.
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- New CLI flag: -b/--cookie, cookie data for compatibility with copy as curl.
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- New Output format are available: HTML and Markdown table.
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- New CLI flag: -l, shows target location of redirect responses
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- Filtering and matching by status code, response size or word count now allow using ranges in addition to single values
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- The internal logging information to be discarded, and can be written to a file with the new `-debug-log` flag.
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- v0.10
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- New
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- New CLI flag: -ac to autocalibrate response size and word filters based on few preset URLs.
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- New CLI flag: -timeout to specify custom timeouts for all HTTP requests.
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- New CLI flag: --data for compatibility with copy as curl functionality of browsers.
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- New CLI flag: --compressed, dummy flag that does nothing. for compatibility with copy as curl.
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- New CLI flags: --input-cmd, and --input-num to handle input generation using external commands. Mutators for example. Environment variable FFUF_NUM will be updated on every call of the command.
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- When --input-cmd is used, display position instead of the payload in results. The output file (of all formats) will include the payload in addition to the position however.
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- Changed
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- Wordlist can also be read from standard input
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- Defining -d or --data implies POST method if -X doesn't set it to something else than GET
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- v0.9
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- New
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- New output file formats: CSV and eCSV (CSV with base64 encoded input field to avoid CSV breakage with payloads containing a comma)
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- New CLI flag to follow redirects
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- Erroring connections will be retried once
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- Error counter in status bar
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- New CLI flags: -se (stop on spurious errors) and -sa (stop on all errors, implies -se and -sf)
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- New CLI flags: -e to provide a list of extensions to add to wordlist entries, and -D to provide DirSearch wordlist format compatibility.
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- Wildcard option for response status code matcher.
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- v0.8
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- New
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- New CLI flag to write output to a file in JSON format
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- New CLI flag to stop on spurious 403 responses
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- Changed
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- Regex matching / filtering now matches the headers alongside of the response body
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## TODO
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- Tests!
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- Optional scope for redirects
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- Client / server architecture to queue jobs and fetch the results later
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- Fuzzing multiple values at the same time
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- Output module to push the results to an HTTP API
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