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Oracle Java Applet Preloader Click-2-Play Warning Bypass

Oracle Java Applet Preloader Click-2-Play Warning Bypass
Posted Jul 8, 2013
Authored by Florent Hochwelker | Site vupen.com

VUPEN Vulnerability Research Team discovered a critical vulnerability in Oracle Java. The vulnerability is caused by a design error in the Java click-2-play security warning when the preloader is used, which can be exploited by remote attackers to load a malicious applet (e.g. taking advantage of a Java memory corruption vulnerability) without any user interaction. Oracle Java versions 7u21 and below are affected.

tags | advisory, java, remote
MD5 | f4df9287828dacad65f91618b96799fa

Oracle Java Applet Preloader Click-2-Play Warning Bypass

Change Mirror Download
VUPEN Security Research - Oracle Java Applet Preloader Click-2-Play
Warning Bypass Vulnerability

Website : http://www.vupen.com

Twitter : http://twitter.com/vupen


I. BACKGROUND
---------------------

"Java is the foundation for virtually every type of networked application
and is the global standard for developing and delivering mobile
applications,
games, Web-based content, and enterprise software." (Oracle)


II. DESCRIPTION
---------------------

VUPEN Vulnerability Research Team discovered a critical vulnerability
in Oracle Java.

The vulnerability is caused by a design error in the Java click-2-play
security warning when the preloader is used, which can be exploited by
remote attackers to load a malicious applet (e.g. taking advantage of
a Java memory corruption vulnerability) without any user interaction


III. AFFECTED PRODUCTS
---------------------------

Oracle Java version 7u21 and prior


IV. Binary Analysis & Exploits/PoCs
---------------------------------------

In-depth technical analysis of the vulnerability and a private exploit will
be available through the VUPEN BAE (Binary Analysis & Exploits) portal:

http://www.vupen.com/english/services/ba-index.php

VUPEN Binary Analysis & Exploits Service provides private exploits and
in-depth technical analysis of the most significant public vulnerabilities
based on disassembly, reverse engineering, protocol analysis, and code
audit.

The service allows governments and major corporations to evaluate risks, and
protect infrastructures and assets against new threats. The service also
allows security vendors (IPS, IDS, AntiVirus) to supplement their internal
research efforts and quickly develop both vulnerability-based and
exploit-based signatures to proactively protect their customers from attacks
and emerging threats.


V. VUPEN Threat Protection Program
-----------------------------------

Governments and major corporations which are members of the VUPEN Threat
Protection Program (TPP) have been proactively alerted about the
vulnerability
when it was discovered by VUPEN in advance of its public disclosure, and
have received a detailed attack detection guidance to protect national and
critical infrastructures against potential 0-day attacks exploiting this
vulnerability:

http://www.vupen.com/english/services/tpp-index.php


VI. SOLUTION
----------------

Upgrade to Java 7u25 or later.


VII. CREDIT
--------------

This vulnerability was discovered by Florent H. of VUPEN Security


VIII. ABOUT VUPEN Security
---------------------------

VUPEN is the leading provider of defensive and offensive cybersecurity
intelligence and advanced vulnerability research. VUPEN solutions enable
corporations and governments to manage risks, and protect critical networks
and infrastructures against known and unknown vulnerabilities.

VUPEN solutions include:

* VUPEN Binary Analysis & Exploits Service (BAE) :
http://www.vupen.com/english/services/ba-index.php

* VUPEN Threat Protection Program (TPP) :
http://www.vupen.com/english/services/tpp-index.php


IX. REFERENCES
----------------------

http://www.oracle.com/technetwork/topics/security/javacpujun2013-1899847.html
http://www.vupen.com/english/research.php


X. DISCLOSURE TIMELINE
-----------------------------

****-**-** - Vulnerability Discovered by VUPEN
2013-06-18 - Vulnerability Fixed in Java 7u25
2013-07-08 - Public disclosure

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