Rapid7

module

Plesk/myLittleAdmin ViewState .NET Deserialization

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Disclosed
May 15, 2020
Created
May 22, 2020

Description

This module exploits a ViewState .NET deserialization vulnerability in
web-based MS SQL Server management tool myLittleAdmin, for version 3.8
and likely older versions, due to hardcoded parameters in
the web.config file for ASP.NET.

Popular web hosting control panel Plesk offers myLittleAdmin as an
optional component that is selected automatically during "full"
installation. This exploit caters to the Plesk target, though it
should work fine against a standalone myLittleAdmin setup.

Successful exploitation results in code execution as the user running
myLittleAdmin, which is IUSRPLESK_sqladmin for Plesk and described as
the "SQL Admin MSSQL anonymous account."

Tested on the latest Plesk Obsidian with optional myLittleAdmin 3.8.

Authors

Spencer McIntyre
wvu [email protected]

Platform

Windows

Architectures

cmd, x86, x64

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/plesk_mylittleadmin_viewstate
    msf exploit(plesk_mylittleadmin_viewstate) > show targets
        ...targets...
    msf exploit(plesk_mylittleadmin_viewstate) > set TARGET < target-id >
    msf exploit(plesk_mylittleadmin_viewstate) > show options
        ...show and set options...
    msf exploit(plesk_mylittleadmin_viewstate) > exploit
Title
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