LPE vulnerabilities exploitation on Windows 10 Anniversary Update

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Desktop heap • Desktop heap is created with Desktop object. • Desktop heap is mapped into GUI process address space. • Desktop heap contains some USER objects and structures. • We can get user mode mapping of kernel mode address (located on desktop heap) by simple calculation UserModeAddress = KernelModeAddress – TEB.Win32ClientInfo.ulClientDelta • Some Windows API are using this feature to avoid entering to kernel when reading structures.
Objects/structures in Desktop heap Some objects/structures allocated on Desktop heap (following list is incomplete). Name Type Comment Window (tagWND) Object Can be allocated on pool when no desktop specified Menu (tagMENU) Hook (tagHOOK) _CALLPROCDATA Input context (tagIMC) Object Object Object Object tagITEM Structure Popup menu items tagDESKTOPINFO Structure tagPROPLIST, tagPROP Structure Window prop list tagCLS Structure Window class, can be allocated on pool when no desktop specified tagMENULIST Structure
Page 1 and 2: LPE vulner
Page 3 and 4: GDI handle table before updates •
Page 5 and 6: Usage of GDI objects addresses •
Page 7 and 8: GDI handle management after updates
Page 9 and 10: BYPASS METHODS
Page 11: Allocation of GDI and USER objects
Page 15 and 16: Bypass methods Our methods are base
Page 17 and 18: Arbitrary read/write via USER objec
Page 19 and 20: • Arbitrary read Arbitrary read v
Page 21 and 22: Arbitrary write via USER objects BO
Page 23 and 24: Read/Write address corrections •
Page 25 and 26: Arbitrary read/write via user objec
Page 27 and 28: • Preparing memory and use old SU
Page 29 and 30: GDI structure address leak Getting
Page 31 and 32: Getting address of tagCLS.pdce We c
Page 33 and 34: Getting address of tagCLS.lpszMenuN
Page 35 and 36: Useful objects/structures in GDI po
Page 37 and 38: tagCLS.lpszMenuName spray advantage
Page 39 and 40: DEMO
Page 41 and 42: QUESTIONS?

LPE vulnerabilities exploitation on Windows 10 Anniversary Update

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