Microsoft Office «Follina» Zero-Day

Find Devices Vulnerable to CVE-2022-30190

Microsoft released a new security advisory for CVE-2022-30190, a vulnerability in the Microsoft Support Diagnostic Tool. Microsoft summarizes the vulnerability as follows:

A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights.

While there is no official fix yet, Microsoft has detailed how to prevent attackers from abusing the vulnerability with some registry key changes You can read more about the vulnerability in our Microsoft Office Vulnerability blog post. The audit below will give you a full overview of all your devices and whether the registry key that needs to be deleted has been detected, thus showing you if the devices are vulnerable or not.

Before running the audit, add the following to your custom registry scanning configuration.

Rootkey: HKEY_CLASSES_ROOT
Regpath: ms-msdt
You can leave Regvalue blank.

Microsoft Office "Follina" Zero-Day Query

Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetName,
tblAssets.Domain,
tblAssets.Username,
tblAssets.Userdomain,
Coalesce(tsysOS.Image, tsysAssetTypes.AssetTypeIcon10) As icon,
tblAssets.IPAddress,
tsysIPLocations.IPLocation,
tblAssetCustom.Manufacturer,
tblAssetCustom.Model,
tsysOS.OSname As OS,
tblAssets.Version,
tblAssets.SP,
Case
When TsysLastscan.Lasttime < GetDate() - 1 Then
'Last registry scan more than 24 hours ago! Information may not be up-to-date. Try rescanning this machine.'
End As Comment,
Case
When SubQuery1.Value Is Not Null And SubQuery1.Value <> ''
Then 'Yes'
Else 'No'
End As [Vulnerable to CVE-2022-30190],
Case
When tblErrors.ErrorText Is Not Null Or
tblErrors.ErrorText != '' Then
'Scanning Error: ' + tsysasseterrortypes.ErrorMsg
Else ''
End As ScanningErrors,
TsysLastscan.Lasttime As LastRegistryScan,
SubQuery1.Lastchanged,
tblAssets.Firstseen,
tblAssets.Lastseen,
tblAssets.Lasttried,
Case
When SubQuery1.Value Is Not Null And SubQuery1.Value <> ''
Then '#ffadad'
Else '#d4f4be'
End As backgroundcolor
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tsysIPLocations On tsysIPLocations.LocationID =
tblAssets.LocationID
Inner Join tblState On tblState.State = tblAssetCustom.State
Left Join tsysOS On tsysOS.OScode = tblAssets.OScode
Left Join (Select Distinct Top 1000000 tblErrors.AssetID As ID,
Max(tblErrors.Teller) As ErrorID
From tblErrors
Group By tblErrors.AssetID) As ScanningError On tblAssets.AssetID =
ScanningError.ID
Left Join tblErrors On ScanningError.ErrorID = tblErrors.Teller
Left Join tsysasseterrortypes On tsysasseterrortypes.Errortype =
tblErrors.ErrorType
Inner Join TsysLastscan On tblAssets.AssetID = TsysLastscan.AssetID
Inner Join TsysWaittime On TsysWaittime.CFGCode = TsysLastscan.CFGcode
Left Join (Select Top 1000000 tblRegistry.AssetID,
tblRegistry.Regkey,
tblRegistry.Valuename,
tblRegistry.Value,
tblRegistry.Lastchanged
From tblRegistry
Where tblRegistry.Regkey Like '%HKEY_CLASSES_ROOT\ms-msdt') SubQuery1 On SubQuery1.AssetID =
tblAssets.AssetID
Where tblAssetCustom.State = 1 And TsysWaittime.CFGname = 'registry'
Order By tblAssets.Domain,
tblAssets.AssetName

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