Home page logo
/

bugtraq logo Bugtraq mailing list archives

Re: DoS vulnerabilities in Firefox, Internet Explorer, Chrome, Opera and other browsers
From: "MustLive" <mustlive () websecurity com ua>
Date: Thu, 27 May 2010 23:53:37 +0300

Hello Susan!

As I already wrote you and Adam earlier, every type of disclosure (including
full disclosure and responsible full disclosure) can be good in appropriate
situation. And I use that type of disclosure which is suitable for every
particular case.

Taking into account that 3 from 4 vendors answered me (except Microsoft) and
Google had already non affected Chrome 4, and Mozilla and Opera promised to
fix it (we'll see when and how they do it), then you can see that my
approach works. And responsible full disclosure can force browser vendors to
attend more at security of their software.

Soon I'll write to security mailing lists about new vulnerabilities in
different browsers. And you can not worry about that - in those advisories
I'll use a littler different approach of informing browser vendors. You will
like it ;-).

Let's take one for example.  Did you email secure () microsoft com? I have
before and 100% of the time they respond.

Yes, I did. I emailed Microsoft, like other browser vendors. I knew their
emails, because I wrote to all of these four vendors a lot of times during
2007-2010, and all of them answered many times (who more, who less). But as
I already wrote, in 99% cases they ignored to fix DoS holes (even if they
answered and told, that they agreed that it was DoS and they'd think about
fixing it).

For example Microsoft one time even answered me twice (with thanks), when I
informed them about XSS in IE6. But they didn't fix this vulnerability. It
was Saved XSS (this type of XSS I created after I found this hole in IE),
which was already posted at Bugtraq in 2007. And in 2008 I informed
Microsoft (and posted to Bugtraq) about this vulnerability in IE7 - but MS
ignored. And in 2009 MS released IE8 where this hole was fixed (as I checked
it), without mentioning about this fact and without thanking me (just
silently). Similarly to Mozilla's approach with one XSS in Firefox (which I
informed them), which I already mentioned to Bugtraq in beginning of 2009.

But about DoS holes they didn't answer in 99% of time. And Microsoft never
fixed DoS holes in IE, which I informed them, but fix DoS hole in Outlook.
And answered me twice: one time with thanks and latter when they fixed (MS
was only one vendor who informed me that it fixed DoS hole in their
software, from all of those few cases when browser vendors fixed DoS holes).

So as it clear, browser vendors only answer when they want.

Patches take time.  The do not occur over night.  Furthermore it may take
a day for the vendor to respond to you.

As I mentioned, 3 from 4 developers answered me (but it's not common for
cases with DoS holes). But MS didn't answer me for more than 1,5 week. From
which you can see their attitude to such issues. And on example of Google,
which Chrome 4 was invulnerable to this hole (only Chrome 1.x), shows their
attitude to such issues - that they are working to fix holes (including
those which was in older versions of their browser) even before they will be
found and disclosed by researchers.

Should you have issues, would you consider emailing me first so I can
introduce you to contacts?

Thanks, I don't need help with informing browser vendors. They with no
doubts received all my letters in 2007-2010 and would receive all future
letters. But as said, I'll not be more informing them about DoS holes. This
decision I made in August 2009 and it's final decision.

Best wishes & regards,
MustLive
Administrator of Websecurity web site
http://websecurity.com.ua

----- Original Message ----- From: "Susan Bradley" <sbradcpa () pacbell net>
To: "MustLive" <mustlive () websecurity com ua>
Cc: <bugtraq () securityfocus com>
Sent: Thursday, May 20, 2010 2:58 AM
Subject: Re: DoS vulnerabilities in Firefox, Internet Explorer, Chrome,
Opera and other browsers


Let's take one for example.  Did you email secure () microsoft com? I have
before and 100% of the time they respond.

Patches take time.  The do not occur over night.  Furthermore it may take
a day for the vendor to respond to you.
This isn't about past issues, this is about this issue. A single day did
not pass between when you emailed these vendors and when you posted here.
Have you considered giving these vendors time to respond?  I do not find
that 99% of them don't, rather I find that they do.  Should you have
issues, would you consider emailing me first so I can introduce you to
contacts?

MustLive wrote:
Hello Susan!

Granted I can denial of service a browser just by loading up a horrible
add in or just using a browser

DoS of the browser is already bad thing. And there are many risks for
users
from DoS holes in browsers, which I wrote about in 2008 in my articles
Dangers of DoS attacks on browsers and Dangers of resources consumption
DoS
attacks. But mostly browser developers ignore to fix these issues.

But in this case it's not only attack on browsers, but on the whole
user's
computer - because it's blocking of whole computer and full resource
consumption. Which is working in many browsers, including their last
versions. So browser developers with their neglect to this problem make
possible attacks on the whole users' systems. It was one of leitmotifs of
my
advisory.

can I respectfully ask that you give vendors time to respond before
posting?

This informing of vendors was an exclusion. During 2007-2009 I informed
many
browser developers about many vulnerabilities (as DoS, as others) and
gave
them a lot of time for fixing in many of that cases. But they almost
always
ignore to fix the holes (especially DoS holes, which were only fixed few
times by Google and one time by Microsoft, and not in IE, but in Outlook,
and 99% of cases were completely ignored). Taking that into account last
year I decided from 2010 never inform browser vendors about DoS holes in
their browsers. And this time it was an exclusion (just one). In any case
due to full disclosure the Internet community will be knowing about the
vulnerabilities in browsers which I found and will be knowing the real
state
of security of browsers. It was another leitmotif of my advisory.

So this time I informed browser developers and users about these issues.
And
did I receive any thanks from Susan (especially taking into account that
I
did inform vendors) or any other user of browsers for this info? No :-).
Did
browser vendors answered me? No :-) (at first day) - which is normal for
such cases, based on my experience. Only on second day Opera and Mozilla
answered me and begun investigation of these cases (which is rare case
when
they responded on DoS hole, based on my experience), but not other
vendors.

These vendors do not ignore security issues and do respond

As I already said, in 99% they do ignore and don't respond (and sometimes
were such cases as responded but not fixed, and such case as not
responded
and not thanked me, but fixed). So taking into account my personal
experience with finding vulnerabilities in browsers and informing
vendors,
I'm not informing them about DoS vulnerabilities in their browsers from
this
year (except this one case).

From more then 5 years of my work here is TOP of different group of
people,
based on answering and fixing of vulnerabilities which I informed them
about
(the higher, the better):

1. Developers of Internet related software (such as web servers, ad
blockers, etc.).
2. Developers of web applications.
3. Admins of web sites.
4. Developers of the browsers.

Which must give you a ground for thoughts.

Best wishes & regards,
MustLive
Administrator of Websecurity web site
http://websecurity.com.ua


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]