We have been following one of YouTube’s IT security channels, and they mentioned Zero Day in relation to Microsoft Office (Follina). After researching this, we found that the vulnerability is actually related to Microsoft Support Diagnostic Tool. The detail of the attack is mentioned on this – https://doublepulsar.com/follina-a-microsoft-office-code-execution-vulnerability-1a47fce5629e
According to Microsoft Blog, there is no solution as yet only a workaround – https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
The solution is to block the MSDT protocol to launch the troubleshooter.
To test this, we open a browser and type in:
If it launched a pop-up, it means that the hacker/attacker can exploit this.
To disable this, we run a Command Prompt as Administrator.
To back up the registry to C: root drive, we run the command:
reg export HKEY_CLASSES_ROOT\ms-msdt C:\msdt_regkey_backup.reg
To delete the registry, we run the command:
reg delete HKEY_CLASSES_ROOT\ms-msdt /f
At this point, it’s protected until the patch comes in.
To restore the registry, we run the command:
reg import C:\msdt_regkey_backup.reg
The other suggestion will be upon checking the endpoint security provider.
Also, keep checking the update from the Microsoft Security Response Centre.
Congratulation on reaching the end of this article. We hope that we have been able to shed some light on outlining what you need to know to solve the Microsoft Support Diagnostic Tool Vulnerability.
We write this in such a way that this is not a fixed article. Like in this journey, We learn as we go and we re-write some parts of the article so please keep pinging with this article or any general tech posts.
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