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FBI is warning people against using public phone-charging stations

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Re: FBI is warning people against using public phone-charging stations

#231
post #165

Earlier quoted context omitted.

None of these are necessary, except half of #2. All you'd need is a "middleman" device that is subtle enough to avoid notice by the person plugging in, just like how credit card skimmers work. > 1. The station has to be using USB Ports / Charging cables that are data enabled, not just cables that carry power Doesn't matter, because you're (unwittingly) plugging into the attacker's device, not the station's. > 2. The…

> They'll plug in the phone, unlock it, and browse the internet. iOS devices (maybe Android too, idk) ask you if you want to allow new accessories to access your device. That's why they said you need an exploit.

Android allows you to select the 'USB mode' between charging, MTP/PTP media transfer, debugging (if enabled), and filesystem.

If not an exploit, you need the victim to do something a lot more obviously (though the absolute obviousness of course remains debatable) dumb/risky than merely plug in.

Re: FBI is warning people against using public phone-charging stations

#232

It really surprised me when this article blew up on Twitter as I thought it was common knowledge to never use public chargers and avoid untrusted usb anything after “bad usb”. It showed me how I live in a tech security bubble-a good reminder.

I lately had trouble convincing some non-tech acquaintances that IoT "cloud-enabled" cameras all over their house (including bedroom) as anti-break-in measure are a bad idea as those devices or the storage in some chinese cloud could be hacked. They ridiculed this as "far fetched". I'll never be able to bring up this risk with USB to those guys. Edit: IoC typo -> IoT

I know IoC as “Indicators of Compromise.” While that’s kinda true here, that’s not how you used it. What is IoC short for in your parlance?

Re: FBI is warning people against using public phone-charging stations

#233

Earlier quoted context omitted.

> common knowledge to never use public chargers Perhaps here on HN. Most people will plug their smartphone into any accepting receptacle. trains, airplanes, NYC SmartLink, or ask the bartender if they can plug it in behind the bar. I still carry a DIY Altoids charger that takes a 9V battery (pulled down to proper volts for iPhone). In a battery emergency, my phone is simply on life support and I don't have to look fo…

I try to always travel with a “USB data condom”. The one I have is called a “PortaPow”, and it’s red. It was about $10 on Amazon and it’s a great investment for scenarios where I _reasonably_ trust a power-only USB port not to have been tampered with, like the built in ports on aircraft.

I have thought a power bank would be a good enough condom - for my threat vectors, that is.

Re: FBI is warning people against using public phone-charging stations

#234
post #111

It really surprised me when this article blew up on Twitter as I thought it was common knowledge to never use public chargers and avoid untrusted usb anything after “bad usb”. It showed me how I live in a tech security bubble-a good reminder.

Many people, including many people on this site (and, yes, including myself) wouldn't think twice about plugging into an available port if they need a charge. Maybe I don't plug into an unlabeled port in some random location where it doesn't look like it belongs, but honestly I wouldn't think twice about charging at a designated area at a conference. (Though, yeah, I'd avoid a lot of "normal" activities if I ever att…

> Many people, including many people on this site (and, yes, including myself) wouldn't think twice about plugging into an available port if they need a charge. Maybe I don't plug into an unlabeled port in some random location where it doesn't look like it belongs, but honestly I wouldn't think twice about charging at a designated area at a conference.

This is the solution to that problem:

https://www.amazon.com/PortaPow-3rd-Data-Blocker-Pack/dp/B00...

https://www.amazon.com/PortaPow-NA-USB-C-Data-Blocker/dp/B08...

https://www.amazon.com/PortaPow-Data-Blocker-USB-C-Converter...

Re: FBI is warning people against using public phone-charging stations

#235

Earlier quoted context omitted.

I lately had trouble convincing some non-tech acquaintances that IoT "cloud-enabled" cameras all over their house (including bedroom) as anti-break-in measure are a bad idea as those devices or the storage in some chinese cloud could be hacked. They ridiculed this as "far fetched". I'll never be able to bring up this risk with USB to those guys. Edit: IoC typo -> IoT

I know IoC as “Indicators of Compromise.” While that’s kinda true here, that’s not how you used it. What is IoC short for in your parlance?

Probably meant "IoT cameras".

Though apparently the "Internet of Cows" is something.

Re: FBI is warning people against using public phone-charging stations

#236

Earlier quoted context omitted.

> They'll plug in the phone, unlock it, and browse the internet. iOS devices (maybe Android too, idk) ask you if you want to allow new accessories to access your device. That's why they said you need an exploit.

“This fast charge station requires accessories access to your device for high speed charging” Anyone who would believe a notice like that (or would click trust without thinking) is a prime target. It’s like many scam/spam emails- they often intentionally look a bit dubious, poor grammar, typos etc as the attacker just wants to deal with low hanging fruit, not someone who may wise up quickly that something isn’t right…

Given what I know of battery technology that seems like a plausible requirement. Why wouldn’t the phone and charger communicate?

Re: FBI is warning people against using public phone-charging stations

#237

Earlier quoted context omitted.

You could ship the victim malicious USB cables in the mail with amazon branding on the box. Many people would use them, assuming they were just mis-shipped or ordered by their spouse.

...leaving a literal paper trail of package location tracking? Mail fraud is considered serious. Why commit an extra crime?

It's extremely easy to use cash to pay for postage. Slap fake sender information on the package and you'll be very difficult to find.

Re: FBI is warning people against using public phone-charging stations

#238
post #4

Earlier quoted context omitted.

Seriously need an edited title then. Original title is wildly misleading.

I agree - the only "public charging stations" I see on any kind of regular basis are EV charging stations. It's been a couple of decades since I remember seeing a USB one, not that I doubt their existence.

They're in basically every major airport, as well as most modern airplanes.

Re: FBI is warning people against using public phone-charging stations

#239

I'm seeing a lot of hysteria in response to this random tweet by the Denver FBI's social media person. Do we know of a single real-world use of this hypothetical exploit? Do we know that iOS's (and presumably Android's) protection against untrusted device access isn't enough?

It just doesn't seem like a plausible hack when you take in all the circumstances that have to line up correctly: 1. The station has to be using USB Ports / Charging cables that are data enabled, not just cables that carry power 2. The hacker would need some way of injecting the malware into the charging station ports without being seen, I doubt many charging stations are internet connected so you would have to be at…

Maybe a better attack would be to create and sell a usb condom with malware built in.

Re: FBI is warning people against using public phone-charging stations

#240

Earlier quoted context omitted.

I lately had trouble convincing some non-tech acquaintances that IoT "cloud-enabled" cameras all over their house (including bedroom) as anti-break-in measure are a bad idea as those devices or the storage in some chinese cloud could be hacked. They ridiculed this as "far fetched". I'll never be able to bring up this risk with USB to those guys. Edit: IoC typo -> IoT

I know IoC as “Indicators of Compromise.” While that’s kinda true here, that’s not how you used it. What is IoC short for in your parlance?

IoT. Sorry.
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