Microsoft Windows – ‘LoadUvsTable()’ Heap Buffer Overflow

• Exploit Database
• 21 阅读

• 作者： Hossein Lotfi
  日期： 2017-03-15
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/41615/

• # Date: 15-03-2017
  # Author: Hossein Lotfi (https://twitter.com/hosselot)
  # CVE: CVE-2016-7274
  
  1. Description
  
  An integer overflow error within the "LoadUvsTable()" function of usp10.dll
  can be exploited to cause a heap-based buffer overflow. Full analysis is
  available at:
  
  http://blogs.flexerasoftware.com/secunia-research/2016/12/microsoft_windows_loaduvstable_heap_based_buffer_overflow_vulnerability.html
  
  
  2. Proof of Concept
  
  open “C:\Windows\Fonts\phagspa.ttf” in a hex editor and change the value at
  offset 0x2051 from 0x00000006 to 0x33333334.
  
  
  3. Solution:
  
  Microsoft initially tried to fixed the issue in MS16-147, but the fix was
  incomplete and the issue remained unpatched til Microsoft March 2017 patch
  release:
  
  https://twitter.com/hosselot/status/809059287037251584
  
  It appears MS17-013 finally fixed the vulnerability properly:
  
  https://technet.microsoft.com/en-us/library/security/ms17-013.aspx
  
  @hosselot