mirror of
https://github.com/nmap/nmap.git
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284 lines
8.8 KiB
Lua
284 lines
8.8 KiB
Lua
description = [[
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Attempts to enumerate DNS hostnames by brute force guessing of common subdomains.
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]]
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-- 2011-01-26
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---
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-- @usage
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-- nmap --script dns-brute --script-args dns-brute.domain=foo.com,dns-brute.threads=6,dns-brute.hostlist=./hostfile.txt,newtargets -sS -p 80
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-- nmap --script dns-brute www.foo.com
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-- @args dns-brute.hostlist The filename of a list of host strings to try.
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-- @args dns-brute.threads Thread to use (default 5).
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-- @args dns-brute.srv Perform lookup for SRV records
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-- @args dns-brute.domain Domain name to brute force if no host is specified
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-- @args newtargets Add discovered targets to nmap scan queue
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-- @output
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-- Pre-scan script results:
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-- | dns-brute:
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-- | DNS Brute-force hostnames
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-- | www.foo.com - 127.0.0.1
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-- | mail.foo.com - 127.0.0.2
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-- | blog.foo.com - 127.0.1.3
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-- | ns1.foo.com - 127.0.0.4
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-- |_ admin.foo.com - 127.0.0.5
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author = "Cirrus"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"intrusive", "discovery"}
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prerule = function()
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if not stdnse.get_script_args("dns-brute.domain") then
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stdnse.print_debug(3,
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"Skipping '%s' %s, 'dns-brute.domain' argument is missing.",
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SCRIPT_NAME, SCRIPT_TYPE)
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return false
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end
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return true
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end
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hostrule = function(host)
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return true
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end
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require 'dns'
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require 'stdnse'
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require 'target'
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local HOST_LIST = {
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'www', 'mail', 'blog', 'ns0', 'ns1', 'mail2', 'mail3', 'admin', 'ads', 'ssh',
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'voip', 'sip', 'dns', 'ns2', 'ns3', 'dns0', 'dns1', 'dns2', 'eshop', 'shop',
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'forum', 'ftp', 'ftp0', 'host', 'log', 'mx0', 'mx1', 'mysql', 'sql', 'news',
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'noc', 'ns', 'auth', 'administration', 'adserver', 'alerts', 'alpha', 'ap',
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'app', 'apache', 'apps' , 'appserver', 'gw', 'backup', 'beta', 'cdn', 'chat',
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'citrix', 'cms', 'erp', 'corp', 'intranet', 'crs', 'svn', 'cvs', 'git', 'db',
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'database', 'demo', 'dev', 'devsql', 'dhcp', 'dmz', 'download', 'en', 'f5',
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'fileserver', 'firewall', 'help', 'http', 'id', 'info', 'images', 'internal',
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'internet', 'lab', 'ldap', 'linux', 'local', 'log', 'ipv6', 'syslog',
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'mailgate', 'main', 'manage', 'mgmt', 'monitor', 'mirror', 'mobile', 'mssql',
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'oracle', 'exchange', 'owa', 'mta', 'mx', 'mx0', 'mx1', 'ntp', 'ops', 'pbx',
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'whois', 'ssl', 'secure', 'server', 'smtp', 'squid', 'stage', 'stats', 'test',
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'upload', 'vm', 'vnc', 'vpn', 'wiki', 'xml', 'direct',
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}
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local SRV_LIST = {
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'_afpovertcp._tcp', '_ssh._tcp', '_autodiscover._tcp', '_caldav._tcp',
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'_client._smtp', '_gc._tcp', '_h323cs._tcp', '_h323cs._udp', '_h323ls._tcp',
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'_h323ls._udp', '_h323rs._tcp', '_h323rs._tcp', '_http._tcp', '_iax.udp',
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'_imap._tcp', '_imaps._tcp', '_jabber-client._tcp', '_jabber._tcp',
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'_kerberos-adm._tcp', '_kerberos._tcp', '_kerberos._tcp.dc._msdcs',
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'_kerberos._udp', '_kpasswd._tcp', '_kpasswd._udp', '_ldap._tcp',
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'_ldap._tcp.dc._msdcs', '_ldap._tcp.gc._msdcs', '_ldap._tcp.pdc._msdcs',
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'_msdcs', '_mysqlsrv._tcp', '_ntp._udp', '_pop3._tcp', '_pop3s._tcp',
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'_sip._tcp', '_sip._tls', '_sip._udp', '_sipfederationtls._tcp',
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'_sipinternaltls._tcp', '_sips._tcp', '_smtp._tcp', '_stun._tcp',
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'_stun._udp', '_tcp', '_tls', '_udp', '_vlmcs._tcp', '_vlmcs._udp',
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'_wpad._tcp', '_xmpp-client._tcp', '_xmpp-server._tcp',
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}
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local function guess_domain(host)
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local name
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name = stdnse.get_hostname(host)
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if name and name ~= host.ip then
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return string.match(name, "%.([^.]+%..+)%.?$") or string.match(name, "^([^.]+%.[^.]+)%.?$")
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else
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return nil
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end
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end
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--- Check if an element is inside a table
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--@param table Table to check
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--@param element Element to find in table
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--@return boolean Element was found or not
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function table.contains(table, element)
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if(type(table) == "table") then
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for _, value in pairs(table) do
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if value == element then
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return true
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end
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end
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end
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return false
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end
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-- Single DNS lookup, returning all results. dtype should be e.g. "A", "AAAA".
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local function resolve(host, dtype)
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local status, result = dns.query(host, {dtype=dtype,retAll=true})
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return status and result or false
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end
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local function array_iter(array, i, j)
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return coroutine.wrap(function ()
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while i <= j do
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coroutine.yield(array[i])
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i = i + 1
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end
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end)
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end
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local function thread_main(domainname, results, name_iter)
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local condvar = nmap.condvar( results )
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for name in name_iter do
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for _, dtype in ipairs({"A", "AAAA"}) do
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local res = resolve(name..'.'..domainname, dtype)
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if(res) then
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for _,addr in ipairs(res) do
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local hostn = name..'.'..domainname
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if target.ALLOW_NEW_TARGETS then
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stdnse.print_debug("Added target: "..hostn)
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local status,err = target.add(hostn)
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end
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stdnse.print_debug("Hostname: "..hostn.." IP: "..addr)
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results[#results+1] = { hostname=hostn, address=addr }
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end
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end
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end
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end
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condvar("signal")
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end
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local function srv_main(domainname, srvresults, srv_iter)
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local condvar = nmap.condvar( srvresults )
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for name in srv_iter do
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local res = resolve(name..'.'..domainname, "SRV")
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if(res) then
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for _,addr in ipairs(res) do
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local hostn = name..'.'..domainname
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addr = stdnse.strsplit(":",addr)
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for _, dtype in ipairs({"A", "AAAA"}) do
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local srvres = resolve(addr[4], dtype)
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if(srvres) then
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for srvhost,srvip in ipairs(srvres) do
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stdnse.print_debug("Hostname: "..hostn.." IP: "..srvip)
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srvresults[#srvresults+1] = { hostname=hostn, address=srvip }
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if target.ALLOW_NEW_TARGETS then
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stdnse.print_debug("Added target: "..srvip)
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local status,err = target.add(srvip)
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end
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end
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end
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end
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end
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end
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end
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condvar("signal")
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end
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action = function(host)
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local domainname = stdnse.get_script_args('dns-brute.domain')
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if not domainname then
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domainname = guess_domain(host)
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end
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if not domainname then
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return string.format("Can't guess domain of \"%s\"; use %s.domain script argument.", stdnse.get_hostname(host), SCRIPT_NAME)
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end
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if not nmap.registry.bruteddomains then
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nmap.registry.bruteddomains = {}
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end
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if(not table.contains(nmap.registry.bruteddomains,domainname)) then
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table.insert(nmap.registry.bruteddomains, domainname)
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stdnse.print_debug("Starting dns-brute at: "..domainname)
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local max_threads = stdnse.get_script_args('dns-brute.threads') and tonumber( stdnse.get_script_args('dns-brute.threads') ) or 5
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dosrv = stdnse.get_script_args("dns-brute.srv") or false
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stdnse.print_debug("THREADS: "..max_threads)
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local fileName = stdnse.get_script_args('dns-brute.hostlist')
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local commFile = fileName and nmap.fetchfile(fileName)
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local hostlist
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if commFile then
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local file = io.open(commFile)
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if file then
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hostlist = {}
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while true do
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local l = file:read()
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if not l then
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break
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end
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if not l:match("#!comment:") then
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table.insert(hostlist, l)
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end
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end
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file:close()
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end
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else
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if fileName then
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print("dns-brute: Hostlist file not found. Will use default list.")
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end
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end
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if (not hostlist) then hostlist = HOST_LIST end
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local srvlist = SRV_LIST
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local threads, results, revresults, srvresults = {}, {}, {}, {}
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results['name'] = "Result:"
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local condvar = nmap.condvar( results )
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local i = 1
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local howmany = math.floor(#hostlist/max_threads)+1
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stdnse.print_debug("Hosts per thread: "..howmany)
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repeat
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local j = math.min(i+howmany, #hostlist)
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local name_iter = array_iter(hostlist, i, j)
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threads[stdnse.new_thread(thread_main, domainname, results, name_iter)] = true
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i = j+1
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until i > #hostlist
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local done
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-- wait for all threads to finish
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while( not(done) ) do
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condvar("wait")
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done = true
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for thread in pairs(threads) do
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if (coroutine.status(thread) ~= "dead") then done = false end
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end
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end
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if(dosrv) then
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local i = 1
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local threads = {}
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local howmany_ip = math.floor(#srvlist/max_threads)+1
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local condvar = nmap.condvar( srvresults )
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stdnse.print_debug("SRV's per thread: "..howmany_ip)
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repeat
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local j = math.min(i+howmany_ip, #srvlist)
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local name_iter = array_iter(srvlist, i, j)
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threads[stdnse.new_thread(srv_main, domainname, srvresults, name_iter)] = true
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i = j+1
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until i > #srvlist
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local done
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-- wait for all threads to finish
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while( not(done) ) do
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condvar("wait")
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done = true
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for thread in pairs(threads) do
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if (coroutine.status(thread) ~= "dead") then done = false end
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end
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end
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end
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response = {}
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t_dns = {}
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t_dns['name'] = "DNS Brute-force hostnames"
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if(#results==0) then
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table.insert(t_dns,"No results.")
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end
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for _, res in ipairs(results) do
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table.insert(t_dns, res['hostname'].." - "..res['address'])
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end
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response[#response + 1] = t_dns
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if(dosrv) then
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t_srv = {}
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t_srv['name'] = "SRV results"
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if(#srvresults==0) then
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table.insert(t_srv,"No results.")
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end
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for _, res in ipairs(srvresults) do
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table.insert(t_srv, res['hostname'].." - "..res['address'])
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end
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response[#response + 1] = t_srv
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end
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return stdnse.format_output(true, response)
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end
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end
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