[Full-Disclosure] Re: Mozilla Firefox Certificate Spoofing

From: Stephen Samuel (samuel_at_bcgreen.com)
Date: 07/31/04

  • Next message: please_reply_to_security_at_sco.com: "OpenServer 5.0.6 OpenServer 5.0.7 : Xsco contains a buffer overflow that could be exploited to gain root privileges." 
    To: "E.Kellinis" <me@cipher.org.uk>
Date: Fri, 30 Jul 2004 20:16:12 -0700

    Has this been posted to bugilla????

    E.Kellinis wrote:
    > #########################################
    > Application: Mozilla Firefox
    > Vendors: http://www.mozilla.com
    > Version: 0.9.1 / 0.9.2
    > Platforms: Windows
    > Bug: Certificate Spoofing (Phishing)
    > Risk: High
    > Exploitation: Remote with browser
    > Date: 25 July 2004
    > Author: Emmanouel Kellinis
    > e-mail: me@cipher(dot)org(dot)uk
    > web: http://www.cipher.org.uk
    > List : BugTraq(SecurityFocus)/ Full-Disclosure
    > #########################################
    >
    >
    > =======
    > Product
    > =======
    > A popular Web browser,good alternative of IE and
    > "The web browser" for linux machines,
    > used to view pages on the World Wide Web.
    >
    > ===
    > Bug
    > ===
    >
    > Firefox has caching problem, as a result of that someone can
    > spoof a certificate of any website and use it as his/her own.
    > The problem is exploited using onunload inside < body> and
    > redirection using Http-equiv Refresh metatag,document.write()
    > and document.close()
    >
    > First you direct the redirection metatag to the website
    > of which you want to spoof the certificate, then inside
    > the < body> tag you add onulnoad script so you can control
    > the output inside the webpage with the spoofed certificate.
    >
    > After that you say to firefox, as soon as you unload this page
    > close the stream, aparently the stream you close is
    > the redirection website, you do that with
    > document.close().
    >
    > Now you can write anything you want , you do that
    > using document.write(). After writing the content of you choice
    > you close the stream again , usually firefox wont display your content,
    > although if you check the source code you see it , so the last thing
    > is to refresh the new page (do that using window.location.reload()),
    > after that you have your domain name in the url field , your content
    > in the browser and the magic yellow Lock on the bottom left corner,
    > if you pass your mouse over it you will see displayed the name of
    > the website you spoofed the certificate, if you double click on it you
    > will check full information of the certificate without any warning !
    >
    > You dont need to have SSL in your website ! it will work with
    > http.
    >
    > Additional using this bug malicious websites can bypass content
    > filtering using SSL properties.
    >
    >
    > =====================
    > Proof Of Concept Code
    > =====================
    >
    > < HTML>
    > < HEAD>
    > < TITLE>Spoofer< /TITLE>
    > < META HTTP-EQUIV="REFRESH" CONTENT="0;URL=https://www.example.com">
    > < /HEAD>
    > < BODY
    > onunload="
    > document.close();
    > document.writeln('< body onload=document.close();break;>
    > < h3>It is Great to Use example's Cert!');
    >
    > document.close();
    > window.location.reload();
    > ">
    > < /body>
    >
    >
    > =========================================================
    > *PK:http://www.cipher.org.uk/files/pgp/cipherorguk.public.key.txt
    > ========================================================= 

    -- 
Stephen Samuel +1(604)876-0426                samuel@bcgreen.com
		   http://www.bcgreen.com/~samuel/
    Powerful committed communication. Transformation touching
      the jewel within each person and bringing it to light.
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
  • Next message: please_reply_to_security_at_sco.com: "OpenServer 5.0.6 OpenServer 5.0.7 : Xsco contains a buffer overflow that could be exploited to gain root privileges."

    Relevant Pages