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If you've traveled and tried to get on the Internet, you've probably seen some pretty suspicious looking Wi-Fi networks with names like "Free Wi-Fi" and "Totally Free Internet." Those are likely access points you'd best avoid. Mobile broadband providers are eager to get you to connect to their Wi-Fi-based networks while you’re away from home. These free Wi-Fi connections are popular, for good reason—they help reduce the amount of broadband cellular data you consume, and they often provide better network speeds than what you can manage over a 4G connection. As we reported in our joint experiment with NPR, AT&T sets smartphones to recognize and connect to “attwifi” hotspots automatically.
To demonstrate this, I set up my laptop as a Wi-Fi hotspot broadcasting the network name (SSID) “attwifi” (after alerting my neighbors, of course). Comcast’s Xfinity wireless hotspots present a Web page for login that requests a customer’s account ID and password, and each time you connect to a new hotspot it re-authenticates you.
That means that if someone were to set up a malicious Wi-Fi access point called “xfinitywifi,” devices that have connected to Xfinity’s network before could automatically connect without alerting the user or asking for the password. PwnStar includes the ability to redirect devices connecting to a Web page on the attacking system, record credentials, and then pass the victim on to Internet access as if nothing had happened—meanwhile launching man-in-the-middle attacks against the client (as I demonstrated for myself using an SSID called “notxfinity” to deter any of my neighbors from trying to connect to it).
This sort of attack can be played out anywhere you’d normally connect to a public Wi-Fi network. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Conde Nast.

XFINITY subscribers can watch thousands of XFINITY On Demand™ TV shows and movies anytime, anywhere, even when you are offline. But there's a much bigger threat to your security than somebody randomly fishing for you to connect to them—the networks you've already connected to and trusted, like AT&T and Xfinity. AT&T has built a network of free hotspots for customers at thousands of places—including train stations, as well as Starbucks and McDonald's locations across the country. But they also offer a really easy way for someone to surreptitiously tap into your Internet traffic and capture your account information for less-than-friendly purposes. This can be switched off in iPhones by setting the phone to ask the user before connecting to networks when Wi-Fi is turned on but not associated with a hotspot.
After killing off the settings for my preferred networks on my iPhone, I turned on the Wi-Fi, and it connected to the fake “attwifi” hotspot without prompting. But if you’ve connected once during the day, the hotspot remembers your device and reconnects you without prompting.
Alternatively, using a “honeypot” tool such as PwnStar, an attacker could spoof both the “xfinitywifi” SSID and the Xfinity login page—stealing their Xfinity credentials in the process.
They’re the same set of credentials used to gain access to Comcast customers’ account billing information, webmail, and other services.
They are just common enough to give someone with evil in mind a way to cast a wide net for potential victims over Wi-Fi.

Tools like the ones I’ve tested can be set up to actively go after a user of a public network, force them to disconnect from their existing Wi-Fi network, and then pick up that connection themselves. Comcast has spread its Xfinity wireless network far and wide as well, turning customers’ cable modems into public Wi-Fi hotspots accessible with an Xfinity account login. Millions of AT&T and Xfinity customers could be leaving themselves exposed to surreptitious hacking of their Internet traffic, exposing their personal data as a result.
The same tools I used to spoof Xfinity could be set to automatically respond to a victim’s phone as any Wi-Fi access point they’ve trusted. All of this can be done with something as small as an Android phone as well, using a broadband cellular connection to provide victims with uninterrupted Internet access, as we saw with the PwnPhone.
That’s because of the probe requests generated by smartphones and Wi-Fi—when you turn on your phone’s Wi-Fi adapter, it will seek out any network you’ve ever connected to that it was not told to forget. When I set my attack access point (the laptop) to not connect devices but to respond to all probe requests, my iPhone attempted in turn to connect to every Wi-Fi network I’ve connected to this year.
That in itself can be a privacy concern, since the SSIDs and other data associated with those probe requests can be used to essentially map out my movements.

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Comments to “Xfinity free”

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