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"I suppose that means we have a known Chrome 0-day floating around. Other security experts reacted today to the news of one or more Chrome zero-days, and to Vupen's practice of providing details only to its clients. Last year, Vupen changed its vulnerability disclosure policies when it announced it would no longer report bugs to vendors, but instead would reveal its research only to paying customers. "They are shared exclusively with our Government customers as part of our vulnerability research services."

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"This code and the technical details of the underlying vulnerabilities will not be publicly disclosed," said Vupen. Vupen said it would not publicly release details of the exploit, or the unpatched bug(s) in Chrome. The Vupen attack code also bypassed Windows 7's ASLR (address space layout randomization) and DEP (data execution prevention), two other security technologies meant to make hackers' jobs tougher. Last March, a team from Vupen walked away with a $15,000 cash prize after hacking Safari, the Apple browser that, like Chrome, is built on the open-source WebKit browser engine.īut no one took on Chrome at 2011's Pwn2Own, even though Google had offered a $20,000 prize to the first researcher who hacked the browser and its sandbox. In March - at the first Pwnium - a Russian teenager demonstrated the first zero-day exploit in Chrome in years, which Google patched within 24 hours.įor more from Chloe, follow her on Twitter (Opens in a new window).For example, Chrome has escaped unscathed in the last three Pwn2Own hacking contests, an annual challenge hosted by the CanSecWest conference in Vancouver, British Columbia, and sponsored by HP TippingPoint's bug bounty program. In October, Google awarded $60,000 to a hacker who uncovered a bug in Chrome at Google's Pwnium 2 competition at Hack in the Box 2012 in Kuala Lumpur. We reserve the right to issue partial rewards for partial, incomplete or unreliable exploits." "The bugs used must not be known to us or fixed on trunk. Exploits should be served from a password-authenticated and HTTPS-supported Google property, such as Google App Engine," he continued.

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"Standard Pwnium rules apply: the deliverable is the full exploit plus accompanying explanation and breakdown of individual bugs used. "For those without access to a physical device, note that the Chromium OS developer's guide offers assistance on getting up and running inside a virtual machine."

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"Any installed software (including the kernel and drivers, etc.) may be used to attempt the attack," Evans wrote.

The attack must be carried out via the Wi-Fi version of the Samsung Series 5 Chromebook 550, running the latest version of Chrome OS. "We believe these larger rewards reflect the additional challenge involved with tackling the security defenses of Chrome OS, compared to traditional operating systems," wrote Chris Evans with the Google Chrome security team, in a blog post (Opens in a new window).

Google might issue partial rewards, depending on what people create.

Google promised to dole out up to $3.14159 million in rewards, including $110,000 for each browser or system level compromise in guest mode or as a logged-in user, delivered via a Web page and $150,000 for a each compromise with device persistence - guest to guest with interim reboot, delivered via a Web page. Google said it has been working with the Zero Day Initiative (ZDI) on the conference's rules and decided that since Chrome is already featured in the larger Pwn2Own competition, Pwnium 3 will have a new focus: Chrome OS, Google said. Pwnium 3 will take place at the CanSecWest security conference in Vancouver on March 7. Google today announced its third Pwnium hacking competition, but this year's contest - and more than $3 million in prize money - will focus on Chrome OS rather than the Chrome browser.

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