module

Exchange Control Panel ViewState Deserialization

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Disclosed
02/11/2020
Created
03/04/2020

Description

This module exploits a .NET serialization vulnerability in the
Exchange Control Panel (ECP) web page. The vulnerability is due to
Microsoft Exchange Server not randomizing the keys on a
per-installation basis resulting in them using the same validationKey
and decryptionKey values. With knowledge of these values, an attacker
can craft a special ViewState to cause an OS command to be executed
by NT_AUTHORITY\SYSTEM using .NET deserialization.

Author

Spencer McIntyre

Platform

Windows

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:

    msf > use exploit/windows/http/exchange_ecp_viewstate
    msf /(e) > show actions
        ...actions...
    msf /(e) > set ACTION < action-name >
    msf /(e) > show options
        ...show and set options...
    msf /(e) > run
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