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Evan 2020-06-12 15:29:41 -04:00
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```
______ _
/ _____) | |
( (____ ____ _ _ ____ ____| | _____ ____
\____ \| \| | | |/ _ |/ _ | || ___ |/ ___)
_____) ) | | | |_| ( (_| ( (_| | || ____| |
(______/|_|_|_|____/ \___ |\___ |\_)_____)_|
(_____(_____|
@defparam
```
# Smuggler
An HTTP Request Smuggling / Desync testing tool written in Python 3
## Installation
1) git clone https://github.com/defparam/smuggler.git
2) cd smuggler
3) python3 smuggler.py -u <URL>
## Example Usage
Single Host:
```
python3 smuggler.py -u <URL>
```
List of hosts:
```
cat list_of_hosts.txt | python3 smuggler.py
```
## Options
```
usage: smuggler.py [-h] [-u URL] [-v VHOST] [-x] [-m METHOD] [-l LOG] [-q]
[-t TIMEOUT] [--no-color] [-c CONFIGFILE]
optional arguments:
-h, --help show this help message and exit
-u URL, --url URL Target URL with Endpoint
-v VHOST, --vhost VHOST
Specify a virtual host
-x, --exit_early Exit scan on first finding
-m METHOD, --method METHOD
HTTP method to use (e.g GET, POST) Default: POST
-l LOG, --log LOG Specify a log file
-q, --quiet Quiet mode will only log issues found
-t TIMEOUT, --timeout TIMEOUT
Socket timeout value Default: 5
--no-color Suppress color codes
-c CONFIGFILE, --configfile CONFIGFILE
Filepath to the configuration file of payloads
```
Smuggler at a minimum requires either a URL via the -u/--url argument or a list of URLs piped into the script via stdin.
If the URL specifies `https://` then Smuggler will connect to the host:port using TLS. If the URL specifies `http://`
then no SSL/TLS will be used at all. If only the host is specified then the script will default to `https://`
To specify a different host header from the server address use the -v/--vhost <host> option
Use -x/--exit_early to exit the scan of a given server when a potential issue is found. In piped mode smuggler will just continue to the next host on the list.
Use -m/--method <method> to specify a different HTTP verb from POST (i.e GET/PUT/PATCH/OPTIONS/CONNECT/TRACE/DELETE/HEAD/etc...)
Use -l/--log <file> to write output to file as well as stdout
Use -q/--quiet reduce verbosity and only log issues found
Use -t/--timeout <value> to specify the socket timeout. The value should be high enough to conclude that the socket is hanging, but low enough to speed up testing (default: 5)
Use --no-color to supress the output color codes printed to stdout (logs by default don't include color codes)
Use -c/--configfile <configfile> to specify your smuggler mutation configuration file (default: default.py)
## Config Files
Configuration files are python files that exist in the ./config directory of smuggler. These files describe the content of the HTTP requests and the transfer-encoding mutations to test.
Here is example content of default.py:
```python
def render_template(gadget):
RN = "\r\n"
p = Payload()
p.header = "__METHOD__ __ENDPOINT__?cb=__RANDOM__ HTTP/1.1" + RN
# p.header += "Transfer-Encoding: chunked" +RN
p.header += gadget + RN
p.header += "Host: __HOST__" + RN
p.header += "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36" + RN
p.header += "Content-type: application/x-www-form-urlencoded; charset=UTF-8" + RN
p.header += "Content-Length: __REPLACE_CL__" + RN
return p
mutations["nameprefix1"] = render_template(" Transfer-Encoding: chunked")
mutations["tabprefix1"] = render_template("Transfer-Encoding:\tchunked")
mutations["tabprefix2"] = render_template("Transfer-Encoding\t:\tchunked")
mutations["space1"] = render_template("Transfer-Encoding : chunked")
for i in [0x1,0x4,0x8,0x9,0xa,0xb,0xc,0xd,0x1F,0x20,0x7f,0xA0,0xFF]:
mutations["midspace-%02x"%i] = render_template("Transfer-Encoding:%cchunked"%(i))
mutations["postspace-%02x"%i] = render_template("Transfer-Encoding%c: chunked"%(i))
mutations["prespace-%02x"%i] = render_template("%cTransfer-Encoding: chunked"%(i))
mutations["endspace-%02x"%i] = render_template("Transfer-Encoding: chunked%c"%(i))
mutations["xprespace-%02x"%i] = render_template("X: X%cTransfer-Encoding: chunked"%(i))
mutations["endspacex-%02x"%i] = render_template("Transfer-Encoding: chunked%cX: X"%(i))
mutations["rxprespace-%02x"%i] = render_template("X: X\r%cTransfer-Encoding: chunked"%(i))
mutations["xnprespace-%02x"%i] = render_template("X: X%c\nTransfer-Encoding: chunked"%(i))
mutations["endspacerx-%02x"%i] = render_template("Transfer-Encoding: chunked\r%cX: X"%(i))
mutations["endspacexn-%02x"%i] = render_template("Transfer-Encoding: chunked%c\nX: X"%(i))
```
There are no input arguments yet on specifying your own customer headers and user-agents. It is recommended to create your own configuration file based on default.py and modify it to your liking.
Smuggler comes with 3 configuration files: default.py (fast), doubles.py (niche, slow), exhaustive.py (very slow)
default.py is the fastest because it contains less mutations.
specify configuration files using the -c/--configfile <configfile> command line option
## Payloads Directory
Inside the Smuggler directory is the payloads directory. When Smuggler finds a potential CLTE or TECL desync issue, it will automatically dump a binary txt file of the problematic payload in the payloads directory. All payload filenames are annotated with the hostname, desync type and mutation type. Use these payloads to netcat directly to the server or to import into other analysis tools.
## Helper Scripts
After you find a desync issue feel free to use my Turbo Intruder desync scripts found Here: https://github.com/defparam/tiscripts
`DesyncAttack_CLTE.py` and `DesyncAttack_TECL.py` are great scripts to help stage a desync attack
## License
These scripts are released under the MIT license. See [LICENSE](https://github.com/defparam/smuggler/blob/master/LICENSE).

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@ -37,7 +37,7 @@ from lib.EasySSL import EasySSL
from lib.colorama import Fore, Style
class Desyncr():
def __init__(self, configfile, smhost, smport=443, url="", method="GET", endpoint="/", SSLFlag=False, logh=None, smargs=None):
def __init__(self, configfile, smhost, smport=443, url="", method="POST", endpoint="/", SSLFlag=False, logh=None, smargs=None):
self._configfile = configfile
self._host = smhost
self._port = smport
@ -382,15 +382,14 @@ if __name__ == "__main__":
Parser = argparse.ArgumentParser()
Parser.add_argument('-u', '--url', help="Target URL with Endpoint")
Parser.add_argument('-c', action="store_true",help="")
Parser.add_argument('-v', '--vhost', default="", help="Specify a virtual host")
Parser.add_argument('-x', '--exit_early', action='store_true',help="Exit scan on first finding")
Parser.add_argument('-m', '--method', default="GET", help="HTTP method to use (e.g GET, POST) Default: GET")
Parser.add_argument('-m', '--method', default="POST", help="HTTP method to use (e.g GET, POST) Default: POST")
Parser.add_argument('-l', '--log', help="Specify a log file")
Parser.add_argument('-q', '--quiet', action='store_true', help="Quiet mode will only log issues found")
Parser.add_argument('-t', '--timeout', default=5.0, help="Socket timeout value Default: 5")
Parser.add_argument('--no-color', action='store_true', help="Suppress color codes")
Parser.add_argument('--configfile', default="default.py", help="Filepath to the configuration file of payloads")
Parser.add_argument('-c', '--configfile', default="default.py", help="Filepath to the configuration file of payloads")
Args = Parser.parse_args() # returns data from the options specified (echo)
NOCOLOR = Args.no_color