local http = require "http" local io = require "io" local nmap = require "nmap" local shortport = require "shortport" local stdnse = require "stdnse" local string = require "string" description = [[ Enumerates usernames in Wordpress blog/CMS installations by exploiting an information disclosure vulnerability existing in versions 2.6, 3.1, 3.1.1, 3.1.3 and 3.2-beta2 and possibly others. Original advisory: * http://www.talsoft.com.ar/site/research/security-advisories/wordpress-user-id-and-user-name-disclosure/ ]] --- -- @usage -- nmap -p80 --script http-wordpress-users -- nmap -sV --script http-wordpress-users --script-args limit=50 -- -- @output -- PORT STATE SERVICE REASON -- 80/tcp open http syn-ack -- | http-wordpress-users: -- | Username found: admin -- | Username found: mauricio -- | Username found: cesar -- | Username found: lean -- | Username found: alex -- | Username found: ricardo -- |_Search stopped at ID #25. Increase the upper limit if necessary with 'http-wordpress-users.limit' -- -- @args http-wordpress-users.limit Upper limit for ID search. Default: 25 -- @args http-wordpress-users.basepath Base path to Wordpress. Default: / -- @args http-wordpress-users.out If set it saves the username list in this file. --- author = "Paulino Calderon " license = "Same as Nmap--See https://nmap.org/book/man-legal.html" categories = {"auth", "intrusive", "vuln"} portrule = shortport.http --- -- Returns the username extracted from the url corresponding to the id passed -- If user id doesn't exists returns false -- @param host Host table -- @param port Port table -- @param path Base path to WP -- @param id User id -- @return false if not found otherwise it returns the username --- local function get_wp_user(host, port, path, id) stdnse.debug2("Trying to get username with id %s", id) local req = http.get(host, port, path.."?author="..id, { no_cache = true}) if req.status then stdnse.debug1("User id #%s returned status %s", id, req.status) if req.status == 301 then local _, _, user = string.find(req.header.location, 'https?://.*/.*/(.*)/') return user elseif req.status == 200 then -- Users with no posts get a 200 response, but the name is in an RSS link. -- http://seclists.org/nmap-dev/2011/q3/812 local _, _, user = string.find(req.body, 'https?://.-/author/(.-)/feed/') return user end end return false end --- --Returns true if WP installation exists. --We assume an installation exists if wp-login.php is found --@param host Host table --@param port Port table --@param path Path to WP --@return True if WP was found -- local function check_wp(host, port, path) stdnse.debug2("Checking %swp-login.php ", path) local req = http.get(host, port, path.."wp-login.php", {no_cache=true}) if req.status and req.status == 200 then return true end return false end --- --Writes string to file --Taken from: hostmap.nse --@param filename Target filename --@param contents String to save --@return true when successful 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 --- --MAIN --- action = function(host, port) local basepath = stdnse.get_script_args(SCRIPT_NAME .. ".basepath") or "/" local limit = stdnse.get_script_args(SCRIPT_NAME .. ".limit") or 25 local filewrite = stdnse.get_script_args(SCRIPT_NAME .. ".out") local output = {""} local users = {} --First, we check this is WP if not(check_wp(host, port, basepath)) then if nmap.verbosity() >= 2 then return "[Error] Wordpress installation was not found. We couldn't find wp-login.php" else return end end --Incrementing ids to enum users for i=1, tonumber(limit) do local user = get_wp_user(host, port, basepath, i) if user then stdnse.debug1("Username found -> %s", user) output[#output+1] = string.format("Username found: %s", user) users[#users+1] = user end end if filewrite and #users>0 then local status, err = write_file(filewrite, stdnse.strjoin("\n", users)) if status then output[#output+1] = string.format("Users saved to %s\n", filewrite) else output[#output+1] = string.format("Error saving %s: %s\n", filewrite, err) end end if #output > 1 then output[#output+1] = string.format("Search stopped at ID #%s. Increase the upper limit if necessary with 'http-wordpress-users.limit'", limit) return stdnse.strjoin("\n", output) end end