Fuzzing with Ffuf
Github: https://github.com/ffuf/ffuf
In a word full of web-fuzzing tools, everyone has a favorite and mine happens to be Ffuf. It might not be as robust as some competitors, but it just freaking works really well and I like the clean output. Here’s some of the common commands you might need in a pinch:
-w Directory/Wordlist/Lives/in.txt -u https://URL.YOU.ARE.Fuzzing/FUZZ -rate 2Put ‘FUZZ’ where you are fuzzing. Example: https://FUZZ.domian.com (subdirectories), https://domian.com/FUZZ (endpoints),
-rate 2,3etc slow it dowwwwwn
-u http://FUZZ.ab.com for subdirectory busting
-output : can use -o, -of (format- html, json etc) | tee
-s silent : do not clog up terminal
-fs filter by size : ignore responses size XYZ, ex: -fs 606
-mc match code : only return responses with code specified, ex: -mc 200
-fc filter by code: ignore responses with code, ex: -fc 302
Fuzzing Headers
Get Parameters:
ffuf -w /path/to/paramnames.txt -u https://target/script.php?FUZZ=test_value -fs 4242POST Data:
ffuf -w /path/to/postdata.txt -X POST -d "username=admin\&password=FUZZ" -u https://target/login.php -fc 401More Fuff Tags
Fuzz Faster U Fool – v2.1.0
HTTP OPTIONS:
-H Header "Name: Value", separated by colon. Multiple -H flags are accepted.
-X HTTP method to use
-b Cookie data "NAME1=VALUE1; NAME2=VALUE2" for copy as curl functionality.
-cc Client cert for authentication. Client key needs to be defined as well for this to work
-ck Client key for authentication. Client certificate needs to be defined as well for this to work
-d POST data
-http2 Use HTTP2 protocol (default: false)
-ignore-body Do not fetch the response content. (default: false)
-r Follow redirects (default: false)
-raw Do not encode URI (default: false)
-recursion Scan recursively. Only FUZZ keyword is supported, and URL (-u) has to end in it. (default: false)
-recursion-depth Maximum recursion depth. (default: 0)
-recursion-strategy Recursion strategy: “default” for a redirect based, and “greedy” to recurse on all matches (default: default)
-replay-proxy Replay matched requests using this proxy.
-sni Target TLS SNI, does not support FUZZ keyword
-timeout HTTP request timeout in seconds. (default: 10)
-u Target URL
-x Proxy URL (SOCKS5 or HTTP). For example: http://127.0.0.1:8080 or socks5://127.0.0.1:8080
GENERAL OPTIONS:
-V Show version information. (default: false)
-ac Automatically calibrate filtering options (default: false)
-acc Custom auto-calibration string. Can be used multiple times. Implies -ac
-ach Per host autocalibration (default: false)
-ack Autocalibration keyword (default: FUZZ)
-acs Custom auto-calibration strategies. Can be used multiple times. Implies -ac
-c Colorize output. (default: false)
-config Load configuration from a file
-json JSON output, printing newline-delimited JSON records (default: false)
-maxtime Maximum running time in seconds for entire process. (default: 0)
-maxtime-job Maximum running time in seconds per job. (default: 0)
-noninteractive Disable the interactive console functionality (default: false)
-p Seconds of delay between requests, or a range of random delay. For example “0.1” or “0.1-2.0”
-rate Rate of requests per second (default: 0)
-s Do not print additional information (silent mode) (default: false)
-sa Stop on all error cases. Implies -sf and -se. (default: false)
-scraperfile Custom scraper file path
-scrapers Active scraper groups (default: all)
-se Stop on spurious errors (default: false)
-search Search for a FFUFHASH payload from ffuf history
-sf Stop when > 95% of responses return 403 Forbidden (default: false)
-t Number of concurrent threads. (default: 40)
-v Verbose output, printing full URL and redirect location (if any) with the results. (default: false)
MATCHER OPTIONS:
-mc Match HTTP status codes, or “all” for everything. (default: 200-299,301,302,307,401,403,405,500)
-ml Match amount of lines in response
-mmode Matcher set operator. Either of: and, or (default: or)
-mr Match regexp
-ms Match HTTP response size
-mt Match how many milliseconds to the first response byte, either greater or less than. EG: >100 or <100
-mw Match amount of words in response
FILTER OPTIONS:
-fc Filter HTTP status codes from response. Comma separated list of codes and ranges
-fl Filter by amount of lines in response. Comma separated list of line counts and ranges
-fmode Filter set operator. Either of: and, or (default: or)
-fr Filter regexp
-fs Filter HTTP response size. Comma separated list of sizes and ranges
-ft Filter by number of milliseconds to the first response byte, either greater or less than. EG: >100 or <100
-fw Filter by amount of words in response. Comma separated list of word counts and ranges
INPUT OPTIONS:
-D DirSearch wordlist compatibility mode. Used in conjunction with -e flag. (default: false)
-e Comma separated list of extensions. Extends FUZZ keyword.
-enc Encoders for keywords, eg. ‘FUZZ:urlencode b64encode’
-ic Ignore wordlist comments (default: false)
-input-cmd Command producing the input. –input-num is required when using this input method. Overrides -w.
-input-num Number of inputs to test. Used in conjunction with –input-cmd. (default: 100)
-input-shell Shell to be used for running command
-mode Multi-wordlist operation mode. Available modes: clusterbomb, pitchfork, sniper (default: clusterbomb)
-request File containing the raw http request
-request-proto Protocol to use along with raw request (default: https)
-w Wordlist file path and (optional) keyword separated by colon. eg. ‘/path/to/wordlist:KEYWORD’
OUTPUT OPTIONS:
-debug-log Write all of the internal logging to the specified file.
-o Write output to file
-od Directory path to store matched results to.
-of Output file format. Available formats: json, ejson, html, md, csv, ecsv (or, ‘all’ for all formats) (default: json)
-or Don’t create the output file if we don’t have results (default: false)
EXAMPLE USAGE:
Fuzz file paths from wordlist.txt, match all responses but filter out those with content-size 42.
Colored, verbose output.
ffuf -w wordlist.txt -u https://example.org/FUZZ -mc all -fs 42 -c -v
Fuzz Host-header, match HTTP 200 responses.
ffuf -w hosts.txt -u https://example.org/ -H “Host: FUZZ” -mc 200
Fuzz POST JSON data. Match all responses not containing text “error”.
ffuf -w entries.txt -u https://example.org/ -X POST -H “Content-Type: application/json” \
-d ‘{“name”: “FUZZ”, “anotherkey”: “anothervalue”}’ -fr “error”
Fuzz multiple locations. Match only responses reflecting the value of “VAL” keyword. Colored.
ffuf -w params.txt:PARAM -w values.txt:VAL -u https://example.org/?PARAM=VAL -mr “VAL” -c
More information and examples: https://github.com/ffuf/ffuf