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Message-ID: <53C64B76.3050005@vupen.com>
Date: Wed, 16 Jul 2014 11:52:54 +0200
From: VUPEN Security Research <advisories@...en.com>
To: bugtraq@...urityfocus.com
Subject: VUPEN Security Research - Microsoft Internet Explorer CSS @import
Memory Corruption (Pwn2Own 2014)
VUPEN Security Research - Microsoft Internet Explorer CSS @import Memory
Corruption (Pwn2Own 2014)
Website : http://www.vupen.com
Twitter : http://twitter.com/vupen
I. BACKGROUND
---------------------
"Microsoft Internet Explorer is a web browser developed by Microsoft and
included as part of the Microsoft Windows line of operating systems with
more than 60% of the worldwide usage share of web browsers." (Wikipedia)
II. DESCRIPTION
---------------------
VUPEN Vulnerability Research Team discovered a critical vulnerability
in Microsoft Internet Explorer.
The vulnerability is caused by a use-after-free vulnerability when
manipulating CSS @import statements through "addImport()" or
"removeImport()", which could be exploited by attackers to leak
arbitrary memory or execute arbitrary code via a malicious web page.
III. AFFECTED PRODUCTS
---------------------------
Microsoft Internet Explorer 11
Microsoft Internet Explorer 10
Microsoft Internet Explorer 9
IV. SOLUTION
----------------
Apply MS14-037 security update.
V. CREDIT
--------------
This vulnerability was discovered by VUPEN Security.
VI. ABOUT VUPEN Security
---------------------------
VUPEN is the leading provider of defensive and offensive cyber security
intelligence and advanced zero-day research. All VUPEN's vulnerability
intelligence results exclusively from its internal and in-house R&D
efforts conducted by its team of world-class researchers.
VUPEN Solutions: http://www.vupen.com/english/services/
VII. REFERENCES
----------------------
https://technet.microsoft.com/library/security/ms14-037
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1763
VIII. DISCLOSURE TIMELINE
-----------------------------
2014-01-24 - Vulnerability Discovered by VUPEN Security
2014-03-14 - Vulnerability Reported to ZDI / Microsoft During Pwn2Own 2014
2014-07-08 - Vulnerability Fixed by Microsoft
2014-07-16 - Public disclosure
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