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A researcher found a flaw in a specific Broadcom Wi-Fi chip that resides in 1 billion Android and iPhones potentially exposing them to malicious attacks and remote execution. Samsung Galaxy. Samsung Gear S3 Frontier vs Samsung Galaxy Watch 42mm vs Samsung Galaxy Watch 46mm. Product Name. Samsung Gear S3 Frontier, Band Strap, Wireless Charging Dock / Display, Stand, Quick Start Guide, User Manual Galaxy Watch (Large Strap). Exynos 7270 Samsung.

LAS VEGAS—It's not often that a security researcher devises an attack that can unleash a self-replicating attack which, with no user interaction, threatens 1 billion smartphones. But that's just what Nitay Artenstein of Exodus Intelligence did in a feat that affected both iOS and Android devices.

At the Black Hat security conference, Artenstein demonstrated proof-of-concept attack code that exploited a vulnerability in Wi-Fi chips manufactured by Broadcom. It fills the airwaves with probes that request connections to nearby computing devices. When the specially devised requests reach a device using the BCM43xx family of Wi-Fi chipsets, the attack rewrites the firmware that controls the chip. The compromised chip then sends the same malicious packets to other vulnerable devices, setting off a potential chain reaction. Until early July and last week—when Google and Apple issued patches respectively—an estimated 1 billion devices were vulnerable to the attack. Artenstein has dubbed the worm 'Broadpwn.'

Although the flaw is now closed, the hack has important lessons as engineers continue their quest to secure mobile phones and other computing devices. Security protections such as address space layout randomization and data execution prevention have now become standard parts of the operating systems and apps. As a result, attackers have to work hard to exploit buffer overflows and other types of software vulnerabilities. That extra work largely makes self-replicating worms impossible. Artenstein's exploit, however, suggests that such worms are by no means impossible.

'This research is an attempt to demonstrate what such an attack, and such a bug, will look like,' the researcher wrote in a detailed blog post. 'Broadpwn is a fully remote attack against Broadcom’s BCM43xx family of Wi-Fi chipsets, which allows for code execution on the main application processor in both Android and iOS. It is based on an unusually powerful 0-day that allowed us to leverage it into a reliable, fully remote exploit.'

Making a comeback

In sharp contrast to the kernels in iOS and Android, the Broadcom chips Artenstein targeted aren't protected by ASLR or DEP. That meant he could reliably know where his malicious code would be loaded in chip memory so he could ensure it got executed. Additionally, he found a flaw across various chipset firmware versions that allowed his code to work universally rather than having to be customized for each firmware build. Making the attack even more potent, targets didn't have to connect to the attacker's Wi-Fi network. Simply having Wi-Fi turned on was sufficient to being hacked.

Artenstein said his attack worked on a wide range of phones, including all iPhones since the iPhone 5, Google's Nexus 5, 6, 6X and 6P models, Samsung Notes 3 devices, and Samsung Galaxy devices from S3 to S8. After he privately reported the flaw, Google and Apple released patches that closed the underlying vulnerability that made the attack possible. Because Wi-Fi chipsets in laptop and desktop computers have more limited access to the computer's networking functions, the researcher doesn't believe they are vulnerable to the same attack. While Artenstein's proof of concept didn't spread from the Wi-Fi chip to infect the phone's kernel, he said that additional step is well within the means of determined hackers. Kailasanathan serial actress.

The remote code-execution vulnerability is the second one to be fixed by Broadcom this year. In April, both Apple and Google patched a separate critical flaw in the manufacturer's Wi-Fi chipsets. Gal Beniamini, the Google Project Zero researcher who discovered the vulnerability, said the absence of security mitigations made his proof-of-concept exploit relatively easy to develop. Together, the flaws suggest a potentially more promising avenue for attackers targeting smart phones.

'Old school hackers often miss the 'good old days' of the early 2000s, when remotely exploitable bugs were abundant, no mitigations were in place to stop them, and worms and malware ran rampant,' Artenstein wrote. 'But with new research opening previously unknown attack surface such as the BCM Wi-Fi chip, those times may just be making a comeback.'

We’ve become used to software-defined radio as the future of radio experimentation, and many of us will have some form of SDR hardware. Pinkham pediatric dentistry pdf. From the $10 RTL USB sticks through to all-singing, all-dancing models at eye-watering prices, there is an SDR for everyone.

What about the idea of an SDR without any external hardware? Instead of plugging something into your Raspberry Pi, how about using the Pi itself, unmodified? That’s just what the Nexmon SDR project has achieved, and this has been made possible through clever use of the on-board Broadcom 802.11ac WiFi chip. The result is a TX-capable SDR, albeit one only capable of operating within the 2.4 GHz and 5 GHz spectrum used by WiFi.

The team had previously worked extensively with the chipset in the Nexus 5 phone, and the SDR extension was first available on that platform. Then along came the Raspberry Pi 3 B+ with a similar-enough WiFi chipset that the same hack was portable to that platform, et voilá: WiFi SDR on a Pi 3 B+.

If you’ve not looked at the Pi 3 B+ we’d like to direct you to our review. If you don’t have a Nexus 5 kicking around, and you’d like to do some WiFi-band SDR work, it’s looking like an amazing deal.

Via rtl-sdr.com.