[WEB SECURITY] Re: Minimal User Interaction with Links

51l3n73y3s 51l3n7 at live.in
Mon Aug 17 11:22:45 EDT 2009


The strange thing is that it stops happening at times and then recurs again 
on the same machine, same browser(FF) with the same configuration, same 
machine. Is this behavior noticed with chrome too?

Regards, Sandeep
--------------------------------------------------
From: "Schmidt, Chris" <cschmidt at servicemagic.com>
Sent: Monday, August 17, 2009 7:24 PM
To: "51l3n73y3s" <51l3n7 at live.in>; "Steven M. Christey" 
<coley at linus.mitre.org>; <micheal.espinola at gmail.com>
Cc: <security-basics at securityfocus.com>; <websecurity at webappsec.org>
Subject: RE: [WEB SECURITY] Re: Minimal User Interaction with Links

> FWIW
>
> Chrome also says it is an invalid cert...
>
> -----Original Message-----
> From: 51l3n73y3s [mailto:51l3n7 at live.in]
> Sent: Friday, August 14, 2009 5:36 PM
> To: Steven M. Christey; micheal.espinola at gmail.com
> Cc: security-basics at securityfocus.com; websecurity at webappsec.org
> Subject: Re: [WEB SECURITY] Re: Minimal User Interaction with Links
>
> Steve,
>
> I agree completely with you.
>
> This link
> http://www.google.co.in/#hl=en&q=limited+users+test&btnG=Google+Search&m
> eta=&aq=f&fp=2cf627ce33d082a9
> will not give a certificate problem with IE, but with Mozilla Firefox
> 3.5.2
> it throws an invalid certificate for the first website in the results
> page.
> Someone trying to fake a military website, Probably? That is off thread,
> if
> someone wants to report that. It shouldn't throw the certificate warning
> at
> all. All I did was to search in Google for "limited users test" (without
>
> quotes) and coincidentally  it came up as the first result. Perhaps it's
>
> still the first. A bug's been filed at
> https://bugzilla.mozilla.org/show_bug.cgi?id=510448 cause I think this
> is
> not normal. It doesn't happen with 3.0, It doesn't happen with IE
> 6.0.2900
> that I have. The browser is not handling this properly. It should keep
> that
> to itself(Block it) even if it's checking each link for validity, though
> I
> don't see a reason why it should even do that.
>
> -Sandeep Cheema
>
>
> --------------------------------------------------
> From: "Steven M. Christey" <coley at linus.mitre.org>
> Sent: Saturday, August 15, 2009 2:41 AM
> To: <micheal.espinola at gmail.com>
> Cc: "51l3n73y3s" <51l3n7 at live.in>; <security-basics at securityfocus.com>;
> <websecurity at webappsec.org>
> Subject: Re: [WEB SECURITY] Re: Minimal User Interaction with Links
>
>>
>> On Fri, 14 Aug 2009, Micheal Espinola Jr wrote:
>>
>>> Under normal circumstances, no, it is not possible in this day and
> age
>>> (i.e with an up-to-date OS) to automatically execute/save a file by
>>> clicking a link.
>>
>> It's possible to do this automatically, without any user interaction,
> by
>> referencing vulnerable ActiveX controls with insecure exposed methods
> with
>> names like DownloadAndExecuteFile() (see CVE-2008-4586 for example).
>>
>> These types of issues are starting to show up fairly regularly in CVE.
>> Very few researchers seem to be paying attention to Firefox plug-ins,
> but
>> once they do, I expect to see similar results there, too.
>>
>> Theoretically it's within the browsers' security models to avoid the
>> automatic save/execute of files, but browser bugs and the
> aforementioned
>> plugin vulnerabilities mean that practically speaking, it's still
>> possible.  I assume the more knowledgeable Flash experts among us have
>> their own suggestions.
>>
>> - Steve
>>
>>
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> ------------------------------------------------------------------------
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