VUPEN Security Research - Google Chrome WebKit Engine Ruby Tag Stale Pointer Vulnerability Website : http://www.vupen.com/english/research.php Twitter : http://twitter.com/vupen I. BACKGROUND --------------------- "Google Chrome is a web browser developed by Google that uses the WebKit layout engine. As of August 2011, Chrome is the third most widely used browser with 23.16% worldwide usage share of web browsers" (Wikipedia) II. DESCRIPTION --------------------- VUPEN Vulnerability Research Team discovered a vulnerability in Google Chrome. The vulnerability is caused by a stale pointer in the WebKit engine when deleting a Ruby tag and its children in a specific order, which could be exploited by remote attackers to compromise a vulnerable system via a specially crafted web page. III. AFFECTED PRODUCTS --------------------------- Google Chrome versions prior to 14.0.835.202 IV. Binary Analysis & Exploits/PoCs --------------------------------------- In-depth binary analysis of the vulnerability and a proof-of-concept code are available through the VUPEN 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 Google Chrome version 14.0.835.202 VII. CREDIT -------------- This vulnerability was discovered by Matthieu Bonetti of VUPEN Security VIII. ABOUT VUPEN Security --------------------------- VUPEN is the world leader in vulnerability research for defensive and offensive cyber security. VUPEN solutions enable corporations and governments to measure and manage risks, eliminate vulnerabilities before they can be exploited, and protect critical infrastructures and assets against known and unknown vulnerabilities. VUPEN has been recently recognized as "Company of the Year in the Vulnerability Research Market (2011)" by Frost & Sullivan. 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://googlechromereleases.blogspot.com/2011/10/stable-channel-update.html http://www.vupen.com/english/research.php X. DISCLOSURE TIMELINE ----------------------------- 2011-09-20 - Vulnerability Discovered by VUPEN and shared with TPP customers 2011-10-05 - Public disclosure