RE: ASP security in HTML pages

["Scovetta, Michael V" <Michael.Scovetta () ca com>]

All--

Also note that the "ShowCode.asp" exploit was relevant only on IIS 4.0 (NT 4.0). It's only an exploit because it was 
included by default and people didn't delete the samples (bad practice in and of itself). Additionally, anyone could 
write a script to send an arbitrary file to the browser.

M

Michael Scovetta
Computer Associates
Senior Application Developer
tel: +1 631 342 3139
cell: +1 813 727 5772
michael.scovetta () ca com
> -----Original Message-----
> From: Calderon, Juan Carlos (GE Commercial Finance, NonGE)
> [mailto:juan.calderon () ge com]
> Sent: Monday, June 28, 2004 11:22 AM
> To: Bénoni MARTIN; Wolf, Yonah; security-basics () securityfocus com;
> webappsec () securityfocus com
> Subject: RE: ASP security in HTML pages
>
> Hi!
>
> From my point of view the easiest way is to use the "frendly" pages to
> show code like ShowCode.asp page at IIS samples.
>
> (Background)
> http://support.microsoft.com/default.aspx?scid=kb;en-us;232449
>
> (Exploit)
> http://www.atstake.com/research/advisories/1999/showcode.txt
>
> (Both)
> http://www.securityfocus.com/infocus/1317
>
> Cheers
> JC
>
> -----Original Message-----
> From: Bénoni MARTIN [mailto:Benoni.MARTIN () libertis ga]
> Sent: Thursday, June 24, 2004 4:11 AM
> To: Wolf, Yonah; security-basics () securityfocus com;
> webappsec () securityfocus com
> Subject: RE: ASP security in HTML pages
>
>
> Well, it seems I have not been very shape in my last posting. I know ASP
> code is executed on the server's side, and not in the client's browser (it
> will just receive the results of the scriting).
>
> But if a client requests "toto.asp", despite of if it will receive the
> "toto.asp" WITHOUT the ASP scripts, the server has a "full toto.asp" WITH
> the asp scripts. So my question was: as the server has in his directory
> this "full toto.asp", is there a way to get the "full toto.asp" from the
> server?
>
>
>
> -----Message d'origine-----
> De : Wolf, Yonah [mailto:Yonah.Wolf () ujc org]
> Envoyé : mercredi 23 juin 2004 14:37
> À : Bénoni MARTIN; security-basics () securityfocus com;
> webappsec () securityfocus com
> Objet : RE: ASP security in HTML pages
>
> Martin,
>
>  I am not quite sure what you are asking?
>
>       Are you asking about 'Classic' asp? Classic ASP code is intertwined
> with HTML in a .ASP file. It is executed server side. The end user cannot
> 'see' the ASP code, even if they look at the source because the code is
> executed at run time and never sent to the browser. So long as your server
> and the original code is secure then end users can't see the code.
>
>       Are you talking about client-side VBScript/JavaScript that runs in
> the browser? If so, it is very hard to hide that from the browser because
> the browser needs to be able to read it to execute the code.
>
>       Or, are you talking about an ASP application that you plan on
> selling/deploying and putting on a clients' server. And not wanting them
> to get access to the code? If this is the case, and you are using ASP.NET
> you can use the code obfuscator to blur the code. If you're using classic
> ASP, I believe you are S.O.O.L.
>
> HTH,
> --Yonah
>
> -----Original Message-----
> From: Bénoni MARTIN [mailto:Benoni.MARTIN () libertis ga]
> Sent: Tuesday, June 22, 2004 7:42 AM
> To: security-basics () securityfocus com; webappsec () securityfocus com
> Subject: ASP security in HTML pages
>
>
> Hi list,
>
> I have been googling around to know how secure can be ASP code, and I
> found what follows:
> - For a newbee, impossible to get the asp scripts inserted in an HTML page
> as they are not displayed in the client's browser,
> - Instead of just letting the ASP code in the HTML pages, we can create
> some DLLs for example, but a not-to-bad skilled hacker can get and reverse
> them.
>
> So, my question to you, skilled-people :) is: is there a way to get the
> asp scripts in a page the server does not send when a client's request
> arrives? There should be a way to ^perform that, but how tough is it?
>
> Thanks in advance, folks!
>
>
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to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
pen testing experience in our state of the art hacking lab. Master the skills
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