Advisory: Google Chrome OnbeforeUload and OnUnload Null Check Vulnerability. Version Affected: Chrome/0.2.149.30 Chrome/0.2.149.29 Chrome/0.2.149.27 Description: Google chrome is susceptible to stringent behavior while handling "onbeforeunload" and "onunload" event in body tags. The malicious script render the browser useless when a event is created in a any kind of loop. As a result of which browser can not be closed and remain in useless form.It is possible to trigger it automatically with a redirect clause which can be used by malicious attacker to trick users. In certain conditions it can be used for browser based denial of service. Proof of Concept: http://www.secniche.org/gwobl/poc.html http://www.secniche.org/gwobl/index.html Links: http://www.secniche.org/advisory.html http://evilfingers.com/advisory/index.php Detection: SecNiche confirmed this vulnerability affects Google Chrome on Microsoft Windows XP SP2 platform.The versions tested are: Chrome/0.2.149.30 Chrome/0.2.149.29 Disclosure Timeline: Disclosed: 19 October 2008 Release Date. 21 October ,2008 Vendor Response: Google acknowledges this vulnerability and "fix" will be released soon. Credit: Aditya K Sood Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There is no representation or warranties, either express or implied by or with respect to anything in this document, and shall not be liable for a ny implied warranties of merchantability or fitness for a particular purpose or for any indirect special or consequential damages.