Adds http-sap-netweaver-leak to detect SAP instances with the Knowledge Management unit enabled with anonymous access. Closes #1243.

CHANGELOG

@@ -1,5 +1,8 @@
 #Nmap Changelog ($Id$); -*-text-*-
 
+o [NSE][GH#1243] Added http-sap-netweaver-leak to detect SAP Netweaver Portal 
+  with the Knowledge Management Unit enabled with anonymous access. [ArphanetX]
+
 o [NSE] Collected utility functions for string processing into a new library,
   stringaux.lua. [Daniel Miller]
 

scripts/http-sap-netweaver-leak.nse

@@ -0,0 +1,137 @@
+local http = require "http"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local vulns = require "vulns"
+local table = require "table"
+
+description = [[
+Detects SAP Netweaver Portal instances vulnerable that allow anonymous access to the
+ KM navigation page. This page leaks file names, ldap users, etc.
+
+SAP Netweaber Portal with the Knowledge Management Unit enable allow unauthenticated
+users to list file system directories through the URL '/irj/go/km/navigation?Uri=/'. 
+
+This issue has been reported and won't be fixed.
+
+References:
+* https://help.sap.com/saphelp_nw73ehp1/helpdata/en/4a/5c004250995a6ae10000000a42189b/frameset.htm
+]]
+
+---
+-- @usage nmap -p 80 --script http-sap-netweaver-leak <target>
+-- @usage nmap -sV --script http-sap-netweaver-leak <target>
+--
+-- @output 
+-- PORT    STATE SERVICE REASON
+-- 443/tcp open  https   syn-ack
+-- | http-sap-netweaver-leak:
+-- |   VULNERABLE:
+-- |   Anonymous access to SAP Netweaver Portal
+-- |     State: VULNERABLE (Exploitable)
+-- |             SAP Netweaver Portal with the Knowledge Management Unit allows attackers to obtain system information
+-- |             including file system structure, LDAP users, emails and other information.
+-- |
+-- |     Disclosure date: 2018-02-1
+-- |     Check results:
+-- |       Visit /irj/go/km/navigation?Uri=/ to access this SAP instance.
+-- |     Extra information:
+-- |       &#x7e;system
+-- |       discussiongroups
+-- |       documents
+-- |       Entry&#x20;Points
+-- |       etc
+-- |       Reporting
+-- |     References:
+-- |_      https://help.sap.com/saphelp_nw73ehp1/helpdata/en/4a/5c004250995a6ae10000000a42189b/frameset.htm
+--
+-- @xmloutput
+-- <table key="NMAP-1">
+-- <elem key="title">Anonymous access to SAP Netweaver Portal</elem>
+-- <elem key="state">VULNERABLE (Exploitable)</elem>
+-- <table key="description">
+-- <el em>SAP Netweaver Portal with the Knowledge Management Unit allows attackers to obtain system information&#xa;
+-- including file system structure, LDAP users, emails and other information.&#xa;</elem>
+-- </table>
+-- <table key="dates">
+-- <table key="disclosure">
+-- <elem key="day">1</elem>
+-- <elem key="year">2018</elem>
+-- <elem key="month">02</elem>
+-- </table>
+-- </table>
+-- <elem key="disclosure">2018-02-1</elem>
+-- <table key="check_results">
+-- <elem>Visit /irj/go/km/navigation?Uri=/ to access this SAP instance.</elem>
+-- </table>
+-- <table key="extra_info">
+-- <elem>&amp;#x7e;system</elem>
+-- </table>
+-- <table key="refs">
+-- <elem>https://help.sap.com/saphelp_nw73ehp1/helpdata/en/4a/5c004250995a6ae10000000a42189b/frameset.htm</elem>
+-- </table>
+-- </table>
+-- </script>
+---
+
+author = "Francisco Leon <@arphanetx>"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"safe", "discovery"}
+
+local evil_path = "/irj/go/km/navigation?Uri=/"
+
+portrule = shortport.http
+
+action = function(host, port)
+  local vuln = {
+    title = 'Anonymous access to SAP Netweaver Portal',
+    state = vulns.STATE.NOT_VULN,
+    description = [[
+SAP Netweaver Portal with the Knowledge Management Unit allows attackers to obtain system information
+including file system structure, LDAP users, emails and other information.
+    ]],
+    references = {
+      'https://help.sap.com/saphelp_nw73ehp1/helpdata/en/4a/5c004250995a6ae10000000a42189b/frameset.htm',
+    },
+    dates = {
+      disclosure = {year = '2018', month = '02', day = '1'},
+    },
+  }
+
+  local status_404, result_404, _= http.identify_404(host,port)
+  if (status_404 and result_404 == 200 ) then
+    stdnse.debug1("Exiting due to ambiguous response from web server on %s%:s.All URIs return status 200", host.ip, port.number)
+    return nil
+  end
+
+  local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port)
+
+  local output_table = stdnse.output_table()
+  local options = {header={}, no_cache=true, bypass_cache=true}
+
+  --We need a valid User Agent for SAP Netweaver Portal servers
+  options['header']['User-Agent'] = "Mozilla/5.0 (compatible; MSIE 10.6; Windows NT 6.1; Trident/5.0; InfoPath.2; SLCC1;"
+                                  ..".NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 2.0.50727) 3gpp-gba UNTRUSTED/1.0"
+
+  local response = http.get(host, port, evil_path, options)
+  if response and response.status == 200 then
+    if string.find(response.body,'logon') then
+      stdnse.debug1("String 'logon' was found in this page. Exiting.")
+      return vuln_report:make_output(vuln)
+    else
+      local files = {}
+      for file in string.gmatch(response.body, "[Cc][Ll][Aa][Ss][Ss][=][\"]urTxtStd[\"]>([^$<]*.)</[Ss][Pp][Aa][Nn]>") do
+        table.insert(files, file)
+      end
+      if #files>0 then
+        vuln.state = vulns.STATE.EXPLOIT
+	vuln.extra_info = files
+	vuln.check_results = string.format("Visit %s to obtain more information about the files.", evil_path)
+      end
+      return vuln_report:make_output(vuln)
+    end
+  else
+    stdnse.debug1("SAP Netweaver Portal not found.")
+    return vuln_report:make_output(vuln)
+  end
+  
+end

scripts/script.db

@@ -230,6 +230,7 @@ Entry { filename = "http-rfi-spider.nse", categories = { "intrusive", } }
 Entry { filename = "http-robots.txt.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "http-robtex-reverse-ip.nse", categories = { "discovery", "external", "safe", } }
 Entry { filename = "http-robtex-shared-ns.nse", categories = { "discovery", "external", "safe", } }
+Entry { filename = "http-sap-netweaver-leak.nse", categories = { "discovery", "safe", } }
 Entry { filename = "http-security-headers.nse", categories = { "discovery", "safe", } }
 Entry { filename = "http-server-header.nse", categories = { "version", } }
 Entry { filename = "http-shellshock.nse", categories = { "exploit", "intrusive", "vuln", } }
@@ -296,7 +297,6 @@ Entry { filename = "impress-remote-discover.nse", categories = { "brute", "intru
 Entry { filename = "informix-brute.nse", categories = { "brute", "intrusive", } }
 Entry { filename = "informix-query.nse", categories = { "auth", "intrusive", } }
 Entry { filename = "informix-tables.nse", categories = { "auth", "intrusive", } }
-Entry { filename = "ip-conflict.nse", categories = { "discovery", "safe", } }
 Entry { filename = "ip-forwarding.nse", categories = { "discovery", "safe", } }
 Entry { filename = "ip-geolocation-geoplugin.nse", categories = { "discovery", "external", "safe", } }
 Entry { filename = "ip-geolocation-ipinfodb.nse", categories = { "discovery", "external", "safe", } }