I’m sure Temu collects all information you put into the app and your behaviour in it, but this guy is making some very bold claims about things that just aren’t possible unless Temu is packing some serious 0-days.
For example he says the app is collecting your fingerprint data. How would that even happen? Apps don’t have access to fingerprint data, because the operating system just reports to the app “a valid fingerprint was scanned” or “an unknown fingerprint was scanned”, and the actual fingerprint never goes anywhere. Is Temu doing an undetected root/jailbreak, then installing custom drivers for the fingerprint sensor to change how it works?
And this is just one claim. It’s just full of bullshit. To do everything listed there it would have to do multiple major exploits that are on state-actor level and wouldn’t be wasted on such trivial purpose. Because now that’s it’s “revealed”, Google and Apple would patch them immediately.
But there is nothing to patch, because most of the claims here are just bullshit, with no technical proof whatsoever.
These are security risks to be sure, and while these permissions are (mostly) on the surface, possibly defensible, together they do clearly represent an app trying to gather all of the data that it can.
However, a lot of info from this report is overblown. For example code compilation is sketchy to be sure, but without a privilege escalation attack, it can’t do anything the app couldn’t do with an update.
Also, there’s some weird language in the report, like counting the green security issues in other apps (like tiktok) as if they were also a problem, despite the image showing that green here means it doesn’t present that particular risk.
All of this to say, if you have temu, probably uninstall it. It’s clearly collecting all the data it can get.
But it’s unlikely to be the immediate threat that will have China taking over your phone like this report implies.
Exactly why I use browser and not apps, too. and if they try to strongarm me with better prices or degraded services, I just stop using them all together.
That… is not a study by anyone who knows what they are talking about. It also does not mention fingerprints at all.
They seem to believe that the app can use permissions undeclared in the manifest file because they obviously think it’s only for the store to show the permissions to the user. Android will not actually allow an app to use undeclared permissions. The most rational explanation is the codebase is shared with different version of the app (possibly not released) that had different manifests.
It also makes a big deal of checking if running as root. That is not evidence of having an escalation exploit. If they have an ability to get root before running the app why would they need to use the app to exploit it? They could just do whatever they wanted and avoid leaving traces in the app. Though I doubt they would root phones to just brick them. It’s the kind of mischief you would expect from a kid writing viruses, not an intelligence agency or criminal enterprise.
Users who root their own phones are very unlikely to run temu as root. In fact a lot of apps related to shopping or banking try to detect root to refuse to work as your system is unsafely. In any case it’s a very niche group to target.
To keep things short, that ‘study’ does not really look credible or written by actual experts.
Yeah, I don’t like Temu, and I’m sure the app is a privacy nightmare, but these claims don’t seem right. If it’s true, I’d like to see someone else verify it.
Haven’t read the article because I’m not interested in an app I don’t use, but does it mean browser fingerprint? Because that’s slang for the fonts/cookies/user-data of your browser, and lots of apps have access to that.
Yes, the phone does, but that data is protected in the hardware and never sent to the software, the hardware basically just sends ok / not ok. It’s not impossible to hack in theory, nothing is, but it would be a very major security exploit in itself that would deserve a bunch of articles on it’s own. And would likely be device specific vulnerability, not something an app just does wherever installed.
Pretty sure this is not true. That’s how apple’s fingerprint scanners work. On android the fingerprint data is stored either in the tpm or a part of the storage encrypted by it.
I’m sure Temu collects all information you put into the app and your behaviour in it, but this guy is making some very bold claims about things that just aren’t possible unless Temu is packing some serious 0-days.
For example he says the app is collecting your fingerprint data. How would that even happen? Apps don’t have access to fingerprint data, because the operating system just reports to the app “a valid fingerprint was scanned” or “an unknown fingerprint was scanned”, and the actual fingerprint never goes anywhere. Is Temu doing an undetected root/jailbreak, then installing custom drivers for the fingerprint sensor to change how it works?
And this is just one claim. It’s just full of bullshit. To do everything listed there it would have to do multiple major exploits that are on state-actor level and wouldn’t be wasted on such trivial purpose. Because now that’s it’s “revealed”, Google and Apple would patch them immediately.
But there is nothing to patch, because most of the claims here are just bullshit, with no technical proof whatsoever.
The study and evidence was already provided months ago
https://grizzlyreports.com/we-believe-pdd-is-a-dying-fraudulent-company-and-its-shopping-app-temu-is-cleverly-hidden-spyware-that-poses-an-urgent-security-threat-to-u-s-national-interests/
This was also linked in the article if you read it
Here’s the actual relevant part
These are security risks to be sure, and while these permissions are (mostly) on the surface, possibly defensible, together they do clearly represent an app trying to gather all of the data that it can.
However, a lot of info from this report is overblown. For example code compilation is sketchy to be sure, but without a privilege escalation attack, it can’t do anything the app couldn’t do with an update.
Also, there’s some weird language in the report, like counting the green security issues in other apps (like tiktok) as if they were also a problem, despite the image showing that green here means it doesn’t present that particular risk.
All of this to say, if you have temu, probably uninstall it. It’s clearly collecting all the data it can get.
But it’s unlikely to be the immediate threat that will have China taking over your phone like this report implies.
This infographic is really helpful. Stuff like this makes me relieved I use the majority of services in a browser, rather than native apps
Exactly why I use browser and not apps, too. and if they try to strongarm me with better prices or degraded services, I just stop using them all together.
Yup. I used to watch TikTok’s sent to me. Now I can’t. They want me to use their app. LOL. Nah.
Thanks, that brings done useful context here
That… is not a study by anyone who knows what they are talking about. It also does not mention fingerprints at all.
They seem to believe that the app can use permissions undeclared in the manifest file because they obviously think it’s only for the store to show the permissions to the user. Android will not actually allow an app to use undeclared permissions. The most rational explanation is the codebase is shared with different version of the app (possibly not released) that had different manifests.
It also makes a big deal of checking if running as root. That is not evidence of having an escalation exploit. If they have an ability to get root before running the app why would they need to use the app to exploit it? They could just do whatever they wanted and avoid leaving traces in the app. Though I doubt they would root phones to just brick them. It’s the kind of mischief you would expect from a kid writing viruses, not an intelligence agency or criminal enterprise.
Users who root their own phones are very unlikely to run temu as root. In fact a lot of apps related to shopping or banking try to detect root to refuse to work as your system is unsafely. In any case it’s a very niche group to target.
To keep things short, that ‘study’ does not really look credible or written by actual experts.
Yeah, I don’t like Temu, and I’m sure the app is a privacy nightmare, but these claims don’t seem right. If it’s true, I’d like to see someone else verify it.
Haven’t read the article because I’m not interested in an app I don’t use, but does it mean browser fingerprint? Because that’s slang for the fonts/cookies/user-data of your browser, and lots of apps have access to that.
Wouldn’t the phone have to have your fingerprint stored in order to compare it to the one scanned?
Yes, the phone does, but that data is protected in the hardware and never sent to the software, the hardware basically just sends ok / not ok. It’s not impossible to hack in theory, nothing is, but it would be a very major security exploit in itself that would deserve a bunch of articles on it’s own. And would likely be device specific vulnerability, not something an app just does wherever installed.
Pretty sure this is not true. That’s how apple’s fingerprint scanners work. On android the fingerprint data is stored either in the tpm or a part of the storage encrypted by it.
Yeah, so the app never sees it. What are you disagreeing with?
I just corrected that, can’t I without disagreeing?
I mean that I don’t know what part of my comment is “not true”. I welcome corrections, I just don’t see what is being corrected here.
It doesn’t send a yes/no signal it sends the fingerprint to be compared to the stored one
https://developer.android.com/identity/sign-in/biometric-auth#display-login-prompt
The app gets either the
onAuthenticationSucceededoronAuthenticationFailedcallback. It doesn’t get the fingerprint.Edit: I think we are misunderstanding each other, I’m saying that apps never see the fingerprint. The OS does, depending on the device.