shark-scan

Allows for fearless concurrent scanning of open TCP ports on a target IP address:

shark-scan
An async multi-threaded port scanner supporting user specified port ranges, timeout durations, and thread quantity

Usage: shark-scan [OPTIONS] --target <TARGET>

Options:
  -t, --target <TARGET>          The target IP address to scan
  -v, --verbosity <VERBOSITY>    The verbosity level (none, low, high) [default: none]
  -n, --threads <THREADS>        [default: 4]
  -p, --port-range <PORT_RANGE>  The port range to scan in the format start:end or comma separated [default: 1:1024]
  -m, --timeout <TIMEOUT>        The time in milliseconds to await successful port connection [default: 100]
      --probe                    ***Do not use against untrusted hosts*** Probe the socket by performing an HTTP GET request
  -h, --help                     Print help
  -V, --version                  Print version

Examples

shark-scan -t 192.168.1.1 -n 6
****************************************
* Scanning: 192.168.1.1 *
****************************************

Port 53 open
Port 80 open
Port 443 open

Scanning completed in 0.40 seconds

shark-scan -t 192.168.1.1 -p 20:25 -n 6 -m 1000 -v high
****************************************
* Scanning: 192.168.1.1 *
****************************************
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 24 refused
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 21 refused
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 22 refused
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 25 refused
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 20 refused
[2024-08-07T09:12:47Z INFO  shark_scan::scanner] Port 23 refused


Scanning completed in 0.00 seconds

❯ shark-scan -t 2600:6c67:6f3f:e79b::1 -p 50:60 -v high
****************************************
* Scanning: 2600:6c67:6f3f:e79b::1 *
****************************************
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 51 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 50 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 52 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 55 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 54 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 56 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 57 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 59 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 60 refused
[2024-08-07T14:14:04Z INFO  shark_scan::scanner] Port 58 refused

Port 53 open

Scanning completed in 0.03 seconds

Safety

While this binary crate does not violate Rust's memory or type safety, executing this program with the --probe flag on an untrusted host may present a security risk. When this flag is used, the following code will execute:

let http_request = format!(
    "GET / HTTP/1.1\r\nHost: {}\r\nConnection: close\r\n\r\n",
    target
);
match stream.write_all(http_request.as_bytes()).await {
    Ok(_) => info!("Sent HTTP GET request to {}", address),
    Err(e) => {
        error!("Failed to send HTTP GET request to {}: {:?}", address, e);
        return None;
    }
}

let mut banner = vec![0; 1024];

// Wait one full second to read response from server
match timeout(Duration::from_secs(1), stream.read(&mut banner)).await {
    Ok(Ok(n)) if n > 0 => {
        info!("Read {} bytes from {}", n, address);
        return Some(String::from_utf8_lossy(&banner[..n]).to_string());
    }
    Ok(Ok(_)) => {
        error!("No data read from {}", address);
    }
    Ok(Err(e)) => {
        error!("Failed to read from {}: {:?}", address, e);
    }
    Err(_) => {
        error!("Read operation timed out for {}", address);
    }
}

A malicious host may respond with a payload crafted to damage your system. If the --probe flag is not supplied, no HTTP requests will be sent, and the program will simply try to complete a TCP connection with the target IP address ports. The decision to use this feature is left to the crate's user and the author assumes no liability for any consequences.

Probe functionality

Currently the functionality provided by passing the --probe flag is limited: it will only perform an HTTP GET request to the service root ("/") endpoint. In the future, I would like to research additional probes that work on services not supporting HTTP. An example of current functionality is shown below:

shark-scan -t 192.168.1.1 -n 6 --probe
****************************************
* Scanning: 192.168.1.1 *
****************************************
[2024-08-07T09:07:43Z ERROR shark_scan::scanner] No data read from 192.168.1.1:443
[2024-08-07T09:07:44Z ERROR shark_scan::scanner] Read operation timed out for 192.168.1.1:53

Port 80 open - HTTP/1.1 308 Permanent Redirect
Location: https://192.168.1.1/
Content-Length: 0
Connection: close
Date: Wed, 07 Aug 2024 09:07:28 GMT
Server: lighttpd/1.4.59


Port 443 open
Port 53 open

Scanning completed in 1.03 seconds

Another example:

shark-scan -t  104.21.94.80 -p 80,443 --probe
****************************************
* Scanning: 104.21.94.80 *
****************************************

Port 443 open - HTTP/1.1 400 Bad Request
Server: cloudflare
Date: Wed, 07 Aug 2024 09:08:42 GMT
Content-Type: text/html
Content-Length: 253
Connection: close
CF-RAY: -

<html>
<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<center>The plain HTTP request was sent to HTTPS port</center>
<hr><center>cloudflare</center>
</body>
</html>

Port 80 open - HTTP/1.1 403 Forbidden
Date: Wed, 07 Aug 2024 09:08:43 GMT
Content-Type: text/plain; charset=UTF-8
Content-Length: 16
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 8af61faa6fd130d1-SEA

error code: 1003

Scanning completed in 0.43 seconds

As you can see, some useful information might be obtained. Pull requests adding to this functionality are welcome.