Exploit matérialisé

CVE-2017-8570

HIGH KEV

1 exploit(s) public(s) pour cette CVE, 1 matérialisé(s) avec leur code.

À des fins de recherche défensive uniquement. Ne testez que sur des systèmes que vous possédez ou pour lesquels vous détenez une autorisation écrite. L'accès non autorisé est illégal.

ExploitDB local windows

Source

Microsoft Office - 'Composite Moniker Remote Code Execution

Par Rich Warren

Comment tester cet exploit

Exploit local. Exécutez sur une installation vulnérable en VM jetable et vérifiez l'élévation de privilèges.

Code md

## What?

This repo contains a Proof of Concept exploit for CVE-2017-8570, a.k.a the "Composite Moniker" vulnerability. This demonstrates using the Packager.dll trick to drop an sct file into the %TEMP% directory, and then execute it using the primitive that the vulnerability provides.

Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/44263.zip

## Why?

A few reasons.

1. I wanted to see if it was possible to use the [Packager.dll file-dropping trick](https://securingtomorrow.mcafee.com/mcafee-labs/dropping-files-temp-folder-raises-security-concerns/) to exploit this vulnerability.
2. As far as I'm aware, all other public exploits for CVE-2017-8570 are actually exploiting the "Script Moniker" variant of CVE-2017-0199 and are not actually composite moniker exploits.
3. Raise awareness of exploitation techniques used in the wild, and help defenders to detect exploitation attempts.

## How to run

Simply run the script, providing an Sct file to execute, and an output name for your RTF file:

    python packager_composite_moniker.py -s calc.sct -o example.rtf
    [+] RTF file written to: example.rtf


## Detection

I have included a Yara rule to detect attempts to exploit this vulnerability via RTF.

## References

- https://justhaifei1.blogspot.co.uk/2017/07/bypassing-microsofts-cve-2017-0199-patch.html
- https://securingtomorrow.mcafee.com/mcafee-labs/dropping-files-temp-folder-raises-security-concerns/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8570