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https://github.com/nxenon/h2spacex

HTTP/2 Single Packet Attack low Level Library / Tool based on Scapy‌
https://github.com/nxenon/h2spacex

http2 race-condition race-conditions scapy single-packet-attack

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HTTP/2 Single Packet Attack low Level Library / Tool based on Scapy‌

Host: GitHub
URL: https://github.com/nxenon/h2spacex
Owner: nxenon
License: gpl-3.0
Created: 2023-10-29T10:34:53.000Z (11 months ago)
Default Branch: main
Last Pushed: 2024-08-12T09:52:17.000Z (about 1 month ago)
Last Synced: 2024-08-13T07:02:44.373Z (about 1 month ago)
Topics: http2, race-condition, race-conditions, scapy, single-packet-attack
Language: Python
Homepage: https://pypi.org/project/h2spacex/
Size: 48.8 KB
Stars: 92
Watchers: 2
Forks: 4
Open Issues: 1
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

awesome-scapy - h2spacex - HTTP/2 low level library based on Scapy which can be used for Single Packet Attack (Race Condition on H2). (Tools)

README

        #    H2SpaceX

[![pypi: 1.1.0](https://img.shields.io/badge/pypi-1.1.0-8c34eb.svg)](https://pypi.org/project/h2spacex/)

[![Python: 3.10](https://img.shields.io/badge/Python->=3.10-blue.svg)](https://www.python.org)

[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-006112.svg)](https://github.com/nxenon/h2spacex/blob/main/LICENSE)

HTTP/2 low level library based on Scapy which can be used for Single Packet Attack (Race Condition on H2)

# Dive into Single Packet Attack Article

I wrote an article and published it at InfoSec Write-ups:

- [Dive into Single Packet Attack](https://infosecwriteups.com/dive-into-single-packet-attack-3d3849ffe1d2)

# TODO

- [Single Packet Attack - POST](https://github.com/nxenon/h2spacex/wiki/Quick-Start-Examples)

  - [x] implement

- [Single Packet Attack - GET](https://github.com/nxenon/h2spacex/wiki/GET-SPA-Methods)

  - [x] Content-Length: 1 Method

  - [x] POST Request with x-override-method: GET header

- Response Parsing

  - [x] implement

  - [x] implement threaded response parser

  - [x] add response times in nano seconds for timing attacks

  - [x] Body Decompression

    - [x] gzip

    - [x] br

    - [x] deflate

- [Proxy](https://github.com/nxenon/h2spacex/wiki/Quick-Start-Examples#proxy-example)

  - [x] Socks5 Proxy

# More Research

Some following statements are just ideas and not tested or implemented.

- More Request in a Single Packet

  - Increase MSS (Idea by James Kettle)

  - Out of Order TCP Packets (Idea by James Kettle)

  - IP Fragmentation

- Proxy the Single Packet Request through SOCKS

- Single Packet Attack on GET Requests

  - [Content-Length: 1 Method](https://github.com/nxenon/h2spacex/wiki/GET-SPA-Methods) (Idea by James Kettle)

  - [x-override-method: GET](https://github.com/nxenon/h2spacex/wiki/GET-SPA-Methods) Method (Idea by James Kettle)

  - Index HPACK Headers to Make GET Requests Smaller

  - HEADERS Frame without END_HEADER Flag

  - HEADERS Frame Without Some Pseudo Headers

# Installation

H2SpaceX works with Python 3 (preferred: >=3.10)

    pip install h2spacex

## Error in Installation

if you get errors of scapy:

    pip install --upgrade scapy

# Quick Start

You can import the HTTP/2 TLS Connection and set up the connection. After setting up the connection, you can do other things:

```python

from h2spacex import H2OnTlsConnection

h2_conn = H2OnTlsConnection(

    hostname='http2.github.io',

    port_number=443

)

h2_conn.setup_connection()

...

```

see more examples in [Wiki Page](https://github.com/nxenon/h2spacex/wiki/Quick-Start-Examples)

# Examples

See examples which contain some Portswigger race condition examples.

[Examples Page](./examples)

# Enhanced Single Packet Attack Method (Black Hat 2024) for Timing Attacks

James Kettle introduced an improved version of Single Packet Attack in Black Hat 2024 for timing attacks:

![Impvoved Version Image](https://github.com/user-attachments/assets/bf7bf88c-937a-4a95-899b-990bc6fc6a23)

You can implement this method easily using `send_ping_frame()` method.

See this Wiki and `Parse Response (Threaded) + Response Times for Timing Attacks` part:

- [New Method README (WIKI)](https://github.com/nxenon/h2spacex/wiki/SPA-New-Method)

[Improved Version of SPA Sample Exploit](./examples/improved-spa-method.py)

## Reference of Improved Method:

- [Listen to the whispers: web timing attacks that actually work](https://portswigger.net/research/listen-to-the-whispers-web-timing-attacks-that-actually-work)

# References & Resources

- [James Kettle DEF CON 31 Presentation](https://youtu.be/tKJzsaB1ZvI?si=6uAuzOt3wjnEGYP6)

- [Portswigger Research Page](https://portswigger.net/research/smashing-the-state-machine#single-packet-attack)

- [HTTP/2 in Action Book](https://www.manning.com/books/http2-in-action)

I also got some ideas from a previous developed library [h2tinker](https://github.com/kspar/h2tinker).

Finally, thanks again to James Kettle for directly helping and pointing some other techniques.