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www.waraxe.us Forum Index -> All other security holes -> Protocol handler?
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Protocol handler?
PostPosted: Mon Feb 02, 2009 5:06 pm Reply with quote
UXo
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Joined: Feb 02, 2009
Posts: 4




Hi waraxe , Im wondering how I can find the URL/Protocol handling, like on chrome *chromehtml:* , so I need to find the Protocol Handler of antoher prog?
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PostPosted: Mon Feb 02, 2009 9:35 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




URI handlers are located in registry. You can commit manual search for "URL Protocol" or use this vbs script:

http://erik.cabetas.com/stuff/lameware/DUH.vbs

Code:

' Dump URL Handlers (DUH! v1) Tested  on win2k and winXP should work on other windows as well
' enumerates all the URL handlers registed on the system, by Erik Cabetas March 2007
'
' You should run this command once and never again!
' cscript.exe //H:CScript
'
' Now run this command to execute the script, you can run it multiple times
' cscript.exe //Nologo DUH.vbs
'
' Change the Const delim  to be some sort of delimter, default is tab
' Then import the output into Openoffice or Excel for a nice data view
'
' satebackire

On Error Resume Next
Const HKCR = &H80000000
Dim wsh
Dim comment
Dim command
Dim isHandler
Const delim = &H09


Set wsh = WScript.CreateObject("WScript.Shell")
Set oReg = GetObject("winmgmts:{impersonationLevel=impersonate}!\\.\root\default:StdRegProv")

ret = oReg.EnumKey(HKCR, "/", arrSubKeys)

if ret<>0 Then
    ret = oReg.EnumKey(HKCR, "", arrSubKeys)
end if
 
if ret=0 and IsArray(arrSubKeys) Then

    For Each subkey In arrSubKeys
        isHandler = wsh.RegRead("HKCR\" & subkey & "\URL Protocol")
        if Err=0 Then
            comment = wsh.RegRead("HKCR\" & subkey & "\")
            command = wsh.RegRead("HKCR\" & subkey & "\shell\open\command\")
            Wscript.Echo subkey & Chr(delim) & comment & Chr(delim) & command
        else
            Err = 0
        end if
    Next
else
    WScript.Echo "Something got messed up ret=" & ret & " err=" & Err & " " & IsArray(arrSubKeys)
    WScript.Echo "Look for the ret code in winerror.h and debug the problem yourself"
    WScript.Echo "or you can try and run it again...sometimes it does not work correctly on the first run"
end if

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Re: Protocol handler?
PostPosted: Fri Feb 06, 2009 2:13 am Reply with quote
johnnycannuk
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Joined: Feb 02, 2009
Posts: 3




UXo wrote:
Hi waraxe , Im wondering how I can find the URL/Protocol handling, like on chrome *chromehtml:* , so I need to find the Protocol Handler of antoher prog?


UXo,

Checkout this:

http://msdn.microsoft.com/en-us/library/aa767914(VS.85).aspx

It give an overview of how URL and URI protocol handlers are registered.

And as waraxe's script indicates, all the handlers are in HKEY_CLASSES_ROOT

Checkout HKEY_CLASSES_ROOT\ftp or HKEY_CLASSES_ROOT\http to see how they work. Then you can look for your particular handler.

(thanks to waraxe, I was looking at this because I didn't have the chromehtml: URI handler on my system to the exploit didn't work.)
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Protocol handler?
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