
It could be a case of aCropalypse now for Google Pixel users, there’s a warning for house buyers, and just why is TikTok being singled out for privacy concerns?
All this and much much more is discussed in the latest edition of the “Smashing Security” podcast by cybersecurity veterans Graham Cluley and Carole Theriault, joined this week by Thom Langford.
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Hello, hello, and welcome to Smashing Security episode 314. My name's Graham Cluley.
But I'm back.
I got a few emails from irate Canadians complaining that you don't know where Vancouver is.
Coming up today's show, Graham, what do you got?
But you've got a problem. You've got a problem. Lots of rude words being used in the White House.
It turns out when people, you know, there's a lot of, you know, chuffing this and Jimmy Carter that. Libbity-jibbit. Yep. Belgium. Holy Zarquons singing fish.
All kinds of stuff is coming out. And oh, it's going to be so embarrassing if that gets out into the public domain, all those or that rude word. So what did they do?
They deleted the expletives. "Expletive deleted" was the phrase.
And as governments, agencies, businesses around the world, they all realise if you don't want a sensitive or embarrassing or awkward piece of information to be shared, in a document that you're posting online, redact it, right?
You should always be careful about what you share.
So I remember a couple of times I've written about this, the UK's MoD, Ministry of Defence, have accidentally leaked secrets about radar defences and nuclear submarines because they publish PDFs online.
And the way in which they did them was they placed a little black bar over the words they didn't want there. And unfortunately, with a PDF editor, you could go in—
And of course, it's also relevant for screenshots. It's not just documents. So a lot of people will pixelate out things, but black boxing—
There'd be something on the bathroom wall about them, and they would be trying to erase it by using a marker or some pens or something on top of it.
And you could always often see through.
They can work out what the words are likely to be underneath. So those tools exist. So you should never really blur or swirl text.
And then obviously don't save it as layers. So if it's a merged down flat image with a black bar and then no one can see what's going on underneath, right?
So if you do that, if you overwrite something with a black bar in an image, or if you crop out sensitive parts of the image. So imagine, Thom, you have an image of yourself.
Maybe you're a client. Maybe you want to show off your manly chest. You've been pumping iron.
You want to have it above your chin.
So what I'll do is I'll crop it, I'll crop it at my belly button, and then they'll just see my manly chest. They won't see anything which is going on beneath.
In this particular case, it's happening on an Android Google Pixel smartphone using the default markup tool.
So this flaw, which they have called Acropalypse, which I think is— Got it.
But in this particular case, what markup does is if you edit an image and then resave it, the way in which it resaves its data is it says, is this new image shorter or taking up less data than the previous image?
And if that's the case, it won't truncate the entire file. It keeps whatever was there at the end still there. It's not visible in the image viewer.
So you think everything is fine, but there's still—
For instance, and this is what these two boffins, Simon Ahrens and David Buchanan, they are the ones who found this vulnerability.
They took an image which they found on Discord of someone who posted up a picture of their credit card saying, hey, look at me, I've got this new credit card.
And they'd blacked out the entire credit card number.
And they've actually created a website where you can upload images taken on your Google Pixel device and see what image may still be remaining there.
And you could have shared it with someone. Isn't this funny? They can't see anything really. But now they could take that image and see what was there before.
And it turns out that actually the moon shot that you took is basically artificially generated.
And they proved this by putting a blurry photo of the moon in a dark room taking a photo of it and getting a perfectly crisp picture of the moon back from the camera.
The bad news is that they haven't issued their March 2023 security update for some Pixel users yet, for some particular Pixel devices.
And people are already waiting for that update because there's another problem at the moment with Android.
Whereby if you know somebody's mobile phone number, that can be enough to hack their phone on particular devices because of the modem chipset.
So you do want to update your Google Android device. The worst news of all, though, is, as Thom suggested, Google hasn't invented a time machine to go back 5 years.
So TikTok, as I'm sure you will all know, is the favourite social media app of teenage children and middle-aged men, it would seem, mainly because the algorithm constantly delivers everything you want based upon what you watch.
So if you like, you know, nubile young people dancing and jiggling, then that's what you're going to get for the rest of your life until 3 AM when you start questioning your life choices, Javad and Andrew.
So, you know, I get the curated format, but it's insanely addictive.
I know my kids are on it and they use it, not to the extent that, you know, middle-aged men do, I must admit, you know, staying up until stupid hours.
But nonetheless, it's a very successful platform. It's, you know, lots of people have monetized on it and made a lot of money out of it, etc.
And of course, it's owned by a company in China, ByteDance, which makes that very, very sensitive.
Now, there have been a number of stories like this, but the most recent one, which I actually think is the company in question using a little bit of a diversionary tactic myself, is the BBC.
They have instructed all of their staff to remove TikTok from their company phones.
Presumably in response to the UK government saying all civil servants and anybody who works for UK government to remove TikTok from their company or organizational phones because there's this big thing about China snooping and using the app to track people, to track habits, to gather data, etc., etc., none of which has actually been proven.
In fact, you know, apart from the standard social media thing.
Now, the thing that gets me here, and I said, apart from the BBC's timing of let's put this out so that people will stop talking about Gary Lineker, but apart from the timing, it makes me feel— and we talk about this on the other security podcast, but the fact is TikTok is probably more benign than say Facebook and Instagram.
And Facebook and Instagram have been caught, well it's the same company, Meta, right? And even, you know, Google generally and, you know, even LinkedIn, etc., etc.
They have been caught multiple times with their hands in the tills of people's private data.
Twitter, for instance, gathered, this is a number of years ago, gathered everybody's mobile phone number under the premise of we will use this for two-factor authentication, we won't share it with anybody, this is purely for your security, and then sold those phone numbers and your personal data to third parties quite blatantly, paid the fine, moved on.
Nothing, nothing.
Nothing wrong with that. You know, it's a company phone. You really should not be looking at all of that.
And yeah, Facebook and Instagram and all that sort of thing? I would put money on the fact that the vast majority of them don't.
You know, to be blunt, this smacks of politics generally and racism at the end of the day.
If it's not to do with the fact that they are a Chinese company, then why are you removing it when there are other products that are gathering the data far more openly and far more egregiously.
It's purely because they're a Chinese company.
But what's strange to me is that people are saying, "Well, you can't use these apps anymore because they're written in China." It's like, well, the device you're running these apps on, your smartphone, where was that manufactured?
I scrolled to the bottom, and you know how they have related articles.
This was 2 minutes, and I immediately found straight after the BBC's article, down the bottom, the UK government says stop using it.
And then you go to the bottom of that one, the Welsh government says remove TikTok go further down, Danish journalists told to remove TikTok.
Then the Canadian government is saying they have to remove TikTok. European Commission saying you have to remove TikTok. And then US is trying to ban it countrywide.
It probably won't go through, let's face it, but nonetheless, that's the kind of knee-jerk reaction.
And yet Facebook is doing far more, egregious data harvesting, probably doing far more in your opinion—well, what about the—
You know, those platforms are far more dangerous, but because they just happen to be American or on American soil, that's perfectly all right.
And yet that data is being sold as well.
The threat and the risk of TikTok is the same, if not potentially less, than Facebook, Instagram, and all of the others. And yet they seem to be absolutely fine.
And, you know, it does—
It's about 8 miles from Denver, right near the Rocky Mountains. Just giving you a visual here so you can kind of feel it out.
So it's no surprise residents Vicky and her daughter, Sarah Ragle, thought this was the place to be.
Now, Vicky is 69, spent 42 years as a middle school teacher, retired this July, right, this past July.
And she and her daughter made a plan that they would find themselves a dream home in the city of Lakewood, where Vicky would be able to enjoy her retirement.
And the thing is, the whole house buying process is complicated. I mean, it's full of formalities and paperwork.
And, you know, it's very clear for those who run the transactions, estate agents and lawyers and lenders. But I think it's daunting for the purchaser or the seller.
Two days before the closing date for the property, the mother and daughter duo get an email from the title company, and they write, "Hi, Vicky and Sarah.
I went ahead and prepared the closing documents and closing statement with the closing date of Friday, the 3rd of March." Great. Attached, please find the final closing statement.
The amount due to close is $198,662.81.
Polite reminder, it then says, as we require funds to be remitted 48 hours prior to closing, kindly advise when you will be ready to remit the closing funds so I can forward the title instructions for your action.
Okay.
But Vicky responds saying, "Okay, I'll call in an hour and we can do that." And the title manager emailed back saying, "Don't call because I'll be in a closing, but here's the information," and provides all the details for the transfer of funds, right?
So they give the title company the near $200,000, right? And then they get an email saying, "Hi Vicki, we have just confirmed receipt of the funds pending.
I will send an escrow confirmation receipt once recorded." So a few days pass. Now Friday, day of closing.
Vicki and Sarah go in to finalize the paperwork and pick up the keys for their brand new home. They're greeted warmly.
Vicki said in media, she said, "We went to the closing on Friday. Everyone was laughing and excited. We signed acres of paper.
And then the title lady said, let me check your funds." And the title lady comes back looking perplexed and asked Vicki and Sarah, "Where did you send the funds to?" And Vicki says, probably wide-eyed, "Send them to you." And the response is, "We don't have them," says the title lady.
But I think a lot of people kind of think, "Oh, business email compromise, I don't need to worry about if I'm an individual, or I don't need to look out for those things.
I'm not a business."
It's where criminals send an email message that appears to come from a known source making a legitimate expected request.
So in this case, the scammers purported to be the title company, and it would easily dupe the person who's expecting to pay that kind of money for a house.
We need to check that you're not a rotter as well. We need to send it to your address." And there was all kinds of verification they had to do on my identity.
But there was this bit which said, "Watch out for scammers." They said it's very common for people to get, for criminals to get involved in the house buying process in an attempt to trick you into transferring the money into the wrong account.
And so they said, "Look, we're not going to tell you that our account details are going to change or anything like that. You know, you're only ever going to deal with us.
And if you have any questions, ring us on this number."
But I think part of it is sometimes the criminals just know that you're buying a house because you've posted it on Facebook or wherever, or Insta or whatever, and they just sort of chance their arm with a dodgy email, as it were.
Their IT is either outsourced or they've got the brother Dave runs it or whatever.
And so it's very easy potentially for their networks and for their email accounts to be compromised.
And the emails actually come from the correct domain name and they've read through the emails and they've got the tone of the people who are talking to you and they've got all the relevant personal details and the actual things that aren't necessarily in the documents, you know, that they— you like being called Thom and not Thomas, for instance, and stuff like that.
Because for a start, if somebody emailed me and said, hello Thomas, I immediately think, well, you're either my mother or you're a criminal, right?
Because the title managers aren't going to go, oh, poor you, you paid the wrong account, here's money. Exactly, right? Let's just go get the house.
And it's unclear at this time how the scammers managed to infiltrate the communication chain.
But she contacted the FBI in Colorado and the Lakewood Police, who I'm sure are all over this.
And as of today, it's currently at $132,600, which is pretty amazing and heartwarming. And it's good to know that there are some lovely people out there.
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The part of the show that we like to call Pick of the Week.
Could be a funny story, a book that they've read, a TV show, a movie, a record, a podcast, a website, or an app. Whatever they wish.
It doesn't have to be security related necessarily.
Not mine, identity thieves, not mine. And we went to go and see a show in London called The Play That Goes Wrong. Have either of you seen The Play That Goes Wrong?
I particularly love the one where I should explain first of all, that The Play That Goes Wrong and The Goes Wrong Show is about—
They forget the words, disasters befall them.
I think the funniest one of the TV show, I think the one I liked the most was the one where they accidentally built the set at a 90-degree angle.
Oh yeah, that's right, that's right, Bruce!
But they carried on, so they moved the cameras to make it look as though it were horizontal, but of course it was really vertical and they were all sat at this table and people were delivering—
It's probably been going for about 10 years. I've actually seen The Play That Goes Wrong now 3 times.
If you like the TV show, this takes it to a whole other level and you just cannot believe what is happening on the stage with the stunts and the humour. It is bonkers.
People get knocked out, so people are removed from the stage. Anyway, all kinds of shenanigans go on.
You can probably go and find out. If you are based out in the States, you may want to check it out. But otherwise, you can catch up on Amazon Prime or BBC iPlayer.
So, my pick of the week this week is The Play That Goes Wrong. Really recommend it, hilarious. Thom, what's your pick of the week?
There was a little executable that was doing the rounds called PooTimer.exe. And when you ran it, this was before, you know, cynicalness crept in and you had to make sure—
But you see, you ran the app and it asked you your salary and, you know, either per year, per month, per week, asked you what percentage tax you pay.
You type that in and up it came and a button that basically said, I'm going for a poo. So you click that when you went for a poo. This is at work, obviously.
And then when you came back from work, from a poo, you click the button again, and it told you how much you got paid while you had a poo.
It's not Rate My Poo, I just want to be clear, that's a very different thing entirely.
So the real one, I have this wonderful little portable espresso maker, which I have with me because the coffee in the office I either have to pay for, or it's this horrible stuff out of an urn.
And so I have a little portable espresso maker by a company called Wacaco. And they do a range of these, and the one I have is called the Minipresso NS2.
I did have the Minipresso NS as well because I like my gadgets, as you both know.
And what this one does, it's called the Minipresso because it uses the Nespresso pods, the ones you can buy in the shops.
So I think Starbucks have got their own and Tesco's and etc., etc.
You pop this into the machine, screw the bottom on it, open up the top, pour in hot water, and then a little plunger comes out and then you pump it.
And then it basically acts like an espresso machine and gives you a perfect espresso shot of coffee from your Nespresso pod.
And he had a very small bathroom, compact, bijou, and this ginormous fishbowl full of hotel shampoos.
But I do have a lot of use for good coffee, and I would highly recommend this. It's great for camping trips as well.
So if you're going camping, if you're going out for the day, you know, all that sort of thing, you just have to take a thermos of hot water.
If you go to the website, you'll see they do other ones where you put ground coffee in. You don't have to use the capsules.
You can get ones which you put just regular ground coffee in. Really, really good.
Not shockingly expensive, you know, it is an investment, not shockingly expensive, and everybody loves it, especially when you offer to make them a cup of coffee.
But I'm getting uncomfortable.
Okay, there's a facility in the middle of New Mexico desert designed to cure kids with video gaming addiction.
Or is it something more sinister?
I had a great time listening to the 8 episodes, getting deeper and deeper into the conspiracy, all while trying to answer the question, just what the heck is going on?
And I'm not a gamer, right? Everyone knows I'm not a gamer. So, you don't need to be a gamer to enjoy this audio drama. But I would recommend it.
I think, I don't know if you listen to audio dramas, Thom.
So my pri— I was gonna say my prick of the whole thing.
So my pick of the week is Restart, podcast from the BBC starring the makers of The Cipher, starring Armin Karima from Sex Education, for those that know it.
So find it wherever you get your pods from. And that's my pick of the week.
Easiest way to find us is at smashingsecurity.com/mastodon and check out the Smashing Security subreddit as well.
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For episode show notes, sponsorship info, guest list, and the entire back catalog of more than 313 episodes, check out smashingsecurity.com.
Hosts:
Graham Cluley:
Carole Theriault:
Guest:
Episode links:
- Stop pixelating! New tool reveals the secrets of “redacted” documents – Hot for Security.
- Google Pixel exploit reverses edited parts of screenshots – The Verge.
- Tweet by researcher Simon Aarons – Twitter.
- aCropalypse demo.
- Samsung ‘Fake’ Moon Shots Controversy Puts Computational Photography in the Spotlight – MacRumors.
- Android phones can be hacked just by someone knowing your phone number – Graham Cluley.
- BBC advises staff to delete TikTok from work phones – BBC News.
- TikTok: UK ministers banned from using Chinese-owned app on government phones – BBC News.
- TikTok banned from official Welsh government phones – BBC News.
- Danish public broadcaster advises staff against using TikTok – BBC News.
- Canada bans TikTok on government devices – BBC News.
- European Commission bans TikTok on staff devices – BBC News.
- New bill would ban TikTok in the US but it faces long odds – BBC News.
- A Retired Teacher and Her Daughter Were Scammed Out of $200,000 Over Email: ‘I’m 69 Years Old and Now I’m Broke and Homeless’ – Entrepreneur.
- Retired Colorado teacher left homeless and broke after scammers hijack house sale – MSN.
- Homebuyers scammed out of nearly $200,000 – YouTube.
- Stolen life savings Vickie and Sarah Ragle – Go Fund Me.
- The Play That Goes Wrong.
- The Goes Wrong Show 90 Degrees clip – YouTube.
- The Goes Wrong Show Series One – Amazon Prime.
- Poo Pays.
- MiniPresso NS2 – Wacaco.
- Restart Podcast – BBC.
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Theme tune: “Vinyl Memories” by Mikael Manvelyan.
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LOVE, LOVE, LOVE YOU AND YOUR PODCAST SERIES!!!!!! You inform and keep me laughing till the tears fill my eyes!!
Cheers from Nova Scotia (on the East Coast of Canada Graham….LOL)