Microsoft SharePoint Unsafe Control and ViewState RCE
Description
The EditingPageParser.VerifyControlOnSafeList method fails to properly validate user supplied data. This can be leveraged by an attacker to leak sensitive information in rendered-preview content. This module will leak the ViewState validation key and then use it to sign a crafted object that will trigger code execution when deserialized. Tested against SharePoint 2019 and SharePoint 2016, both on Windows Server 2016.
Author(s)
- Unknown
- Spencer McIntyre
- wvu <wvu@metasploit.com>
Platform
Windows
Architectures
cmd, x86, x64
Development
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/sharepoint_unsafe_control
msf exploit(sharepoint_unsafe_control) > show targets
...targets...
msf exploit(sharepoint_unsafe_control) > set TARGET < target-id >
msf exploit(sharepoint_unsafe_control) > show options
...show and set options...
msf exploit(sharepoint_unsafe_control) > exploit
- Collect and share all the information you need to conduct a successful and efficient penetration test
- Simulate complex attacks against your systems and users
- Test your defenses to make sure they’re ready
- Automate Every Step of Your Penetration Test
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security