CVE-2022-30190 PoC — Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability

Source

https://github.com/winstxnhdw/CVE-2022-30190

Associated Vulnerability

Title:Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability (CVE-2022-30190)
Description:A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights. Please see the MSRC Blog Entry for important information about steps you can take to protect your system from this vulnerability.

Description

A proof of concept for CVE-2022-30190 (Follina).

Readme

# CVE-2022-30190 (Follina)

[![build.yml](https://github.com/winstxnhdw/CVE-2022-30190/actions/workflows/main.yml/badge.svg)](https://github.com/winstxnhdw/CVE-2022-30190/actions/workflows/main.yml)
[![dependabot.yml](https://github.com/winstxnhdw/CVE-2022-30190/actions/workflows/dependabot.yml/badge.svg)](https://github.com/winstxnhdw/CVE-2022-30190/actions/workflows/dependabot.yml)

A proof of concept (PoC) for CVE-2022-30190 (Follina).

## Requirements

### Victim

- Windows 10 21H1 (equivalent/earlier)
- Security update KB5016616 uninstalled

### Attacker

- [Microsoft .NET SDK](https://dotnet.microsoft.com/en-us/download)
- Python 3.9 or later

## Configuration

Edit `config.xml` to modify the attacker's server hostname and port number.

```xml
<host>
  <name>{ hostname }</name>
  <port>{ port }</port>
</host>
```

## Usage

### Trojan

The following Python script will build the `trojan.docx` file and initialise the attacker's server.

```bash
python init.py
```

### Payload

Build the payload and remove all unnecessary binaries with the following.

```bash
dotnet publish LocalEXF
```

### Clean

Run the following batch script to permanently delete this directory and everything in it.

```ps1
.\destroy_all.bat
```

## Important Notes

- To execute complex PowerShell commands, like this PoC, these commands **must** be Base64 encoded.

- [index.html](build/index.html) must contain at least 4096 bytes of data within the `<script>` tag.

- All arguments must be used as described within [href.txt](build/href.txt).

- Microsoft Word cannot use the [index.html](build/index.html) file to execute JavaScript. But for whatever reason, `location.href` works.

- For commands that invoke long running tasks, a troubleshooter will appear when the victim loads the document. The victim can inadvertently deny the attack by cancelling the troubleshooter. Ensure that the command runtime is short.

File Snapshot


 [4.0K]  /data/pocs/a4168f888c9658b962857b47f94e35079c709d52
├── [4.0K]  build
│   ├── [4.0K]  docx
│   │   ├── [1.3K]  [Content_Types].xml
│   │   ├── [4.0K]  docProps
│   │   │   ├── [ 789]  app.xml
│   │   │   └── [ 792]  core.xml
│   │   ├── [4.0K]  _rels
│   │   └── [4.0K]  word
│   │       ├── [4.0K]  document.xml
│   │       ├── [1.8K]  fontTable.xml
│   │       ├── [4.0K]  _rels
│   │       │   └── [1013]  document.xml.rels
│   │       ├── [3.3K]  settings.xml
│   │       ├── [ 33K]  styles.xml
│   │       ├── [4.0K]  theme
│   │       │   └── [ 14K]  theme1.xml
│   │       └── [ 906]  webSettings.xml
│   ├── [ 365]  href.txt
│   └── [7.3K]  index.html
├── [  59]  config.xml
├── [ 239]  destroy_all.bat
├── [2.4K]  init.py
├── [4.0K]  LocalEXF
│   ├── [ 874]  LocalEXF.csproj
│   ├── [ 636]  omnisharp.json
│   └── [4.0K]  Scripts
│       ├── [4.0K]  Helpers
│       │   ├── [ 539]  GetFileEnumerator.cs
│       │   └── [ 600]  XMLHelper.cs
│       ├── [4.0K]  IO
│       │   ├── [ 490]  FileSystem.cs
│       │   └── [ 410]  Resources.cs
│       ├── [4.0K]  Main.cs
│       ├── [4.0K]  Network
│       │   ├── [ 601]  Host.cs
│       │   └── [1.1K]  Request.cs
│       └── [4.0K]  Utils
│           └── [ 185]  Utils.cs
├── [1.9K]  README.md
└── [4.0K]  server
    └── [ 928]  __init__.py

14 directories, 27 files

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