Article by George Norman

On 23 Oct 2008

The security issue in question refers to the carpet bombing vulnerability that influences several browser packages. The expert to discover the security vulnerabilities within Chrome is Israeli researcher Aviv Raff. He is also the one that says Google did a halfcocked job of fixing the problem. The proof-of-concept code that Aviv Raff released last month showed how an attacker could be successful by exploiting a vulnerability combo within WebKit and Java. An unsuspecting user can be easily fooled into downloading a JAR file which will be automatically executed without the user being aware of it. Google has issued a fix, but there is a catch – only developer versions of Chrome can get it. There are of course some users with enough technical skills to get the update anyway, but this does not mean it is available to the general public, the “point and click” type of user. This is not the first time that Google takes a swing at solving the carpet bombing vulnerability. Their first attempt was back in September, but the “desktop is not the default download location” workaround definitely wasn’t enough. The current fix addresses the manner in which Chrome handles potentially harmful downloads. The way this works is by downloading executable files to “unconfirmed_*.download files” and converting them back to their original name only after the user confirms the download (clicks the Save button). All unconfirmed downloads are automatically deleted when you shut down Google Chrome. This is where Aviv Raff puts an interesting question: what if the browser crashes and the unconfirmed downloads are not deleted? Keep in mind that the Google Chrome browser is still in its Beta phase, so crashes are expected to happen. If the browser does crash and the files are not deleted, you may end up with malware on your machine.



Tags: Google, Google Chrome, Scurity

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