CVE-2019-5736 PoC — Docker 操作系统命令注入漏洞

Source

https://github.com/RyanNgWH/CVE-2019-5736-POC

Associated Vulnerability

Title:Docker 操作系统命令注入漏洞 (CVE-2019-5736)
Description:runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite the host runc binary (and consequently obtain host root access) by leveraging the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.

Description

Proof of concept code for breaking out of docker via runC

Readme

# Breaking out of Docker via RunC
A proof of concept code for CVE-2019-5736

This POC is heavily based on [YuvalAvra's POC](https://github.com/twistlock/RunC-CVE-2019-5736).
I do not claim any credit for the code utilised in this POC.

More information about this vulnerability and a demonstration of how it can be exploited can be found in the [worksheet](Worksheet.pdf).
Information in the worksheet is based a [blog post](https://www.twistlock.com/labs-blog/breaking-docker-via-runc-explaining-cve-2019-5736/)
by Twistlock Labs.

## Usage
This POC has the ability to modify binaries on the host system, therefore, is recommended to be conducted in a virtual machine.

The POC overwrites runC on the host machine with code to setup a persistent remote desktop using VNC

Clone the repository:
```shellscript
$ git clone https://github.com/RyanNgWH/CVE-2019-5736-POC
```

Build and run the Docker image:
```shellscript
$ docker build -t image_name:latest /path/to/malicious_image_POC
$ docker run --rm image_name:latest
```

File Snapshot


 [4.0K]  /data/pocs/b9d9e460e77eaa40a4ede4b59dc9ade6c3fac842
├── [1006]  Dockerfile
├── [1.7K]  new_runc
├── [ 13K]  overwrite_runc
├── [2.9K]  overwrite_runc.c
├── [1.0K]  README.md
├── [ 929]  run_at_link.c
└── [2.4M]  Worksheet.pdf

0 directories, 7 files

Shenlong Bot has cached this for you

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →

Goal Reached Thanks to every supporter — we hit 100%!