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NOTHING CHATS, THE SUNBIRD-BASED IMESSAGE APP, IS A PRIVACY NIGHTMARE WITH
UNENCRYPTED MESSAGES AND IMAGES

Ben Schoon | Nov 18 2023 - 5:47 am PT
21 Comments

Sunbird has been promising iMessage support on Android for about a year now, but
the company has always seemed rather sketchy. Now, as Nothing Chats, built on
Sunbird, has launched, the privacy nightmare is coming true – not only is the
app not end-to-end encrypted as promised, but image files from other users are
pretty easy to access in plain text.

The promise of Sunbird and, in turn, Nothing Chats is to deliver iMessage
support to Android. This is done by having users log into their Apple ID through
the app which routes the login through a Mac server farm. It’s not a unique
method, but the big differentiator here is that Sunbird has made a big deal out
of claiming that end-to-end encryption is kept in place throughout the whole
process.

On Sunbird’s website it directly says:

> The Sunbird servers do not store user data promoting a safe, secure, and
> private messaging environment. With end-to-end encrypted, confidential
> messaging, Sunbird is fully secure and completely private.
> 
> By adding encryption between Android and iMessage where there currently is
> none, Sunbird is the first of its kind to give a unified and safe messaging
> experience to Android users.

Nothing reiterates this on a landing page for Nothing Chats, saying:

> …Nothing Chats is built on Sunbird’s platform and all Chats messages are
> end-to-end encrypted, meaning neither we nor Sunbird can access the messages
> you’re sending and receiving.

But, that’s just not true.

Frightening new findings reveal that Sunbird and Nothing Chats are, in fact, not
fully end-to-end encrypted, as user data can be accessed in plain text.

“Wukko” on Twitter/X published findings that Nothing Chats sends all media
attachments, including user images, to Sentry with links to those attachments
visible in plain text. Further, “all” data is sent and stored through Firebase,
and it’s also completely unencrypted.



9to5Google can independently confirm Wukko’s findings.

In our Dylan Roussel’s research, we found that once a user authenticates with
the JSON Web Tokens (JWT) that are insecure in transit, they can access Nothing
Chat’s Firebase database and see messages and files from other users sent in
real-time and in plain text. He particularly calls out that vCards are
accessible, as these directly include user names, phone numbers, email
addresses, and sometimes even more personal data.

He mentions that over 630,000 media files are currently stored by Sunbird via
Firebase including images, videos, PDFs, audio, and more. So, while it’s true
that Sunbird doesn’t store user data on its own servers, data is very much being
stored.

Dylan further explains his findings in a thread on Twitter/X.




The folks over at Texts.com have also broken this process down in detail.

In a blog post, it’s pointed out that it takes a very short bit of code to
automate the process of downloading this information. A demo of an iMessage
being sent, only for the database to show that “end-to-end encrypted” text in
plain text was also shown, as seen below. A proof of concept was also created
and published to Github to show how it all works.

Image: Texts.blog

Yikes.

We first discovered this, for lack of a better term, privacy nightmare late on
November 17 and immediately notified Nothing (via public relations, as the
company has no point of contact for security problems) due to the very sensitive
nature of this vulnerability – user data is literally on the line here and
completely insecure.

--------------------------------------------------------------------------------

Update: Nothing has confirmed to 9to5Google that it has pulled Nothing Chats
from the Play Store and will be “delaying” the launch to “fix several bugs.” A
Nothing spokesperson says:

> We’ve removed the Nothing Chats beta from the Play store and will be delaying
> the launch until further notice to work with Sunbird to fix several bugs. We
> apologize for the delay and will do right by our users.

What remains unclear at this point is how this will affect Sunbird’s app, as it
has these same issues as evidenced by the hundreds of thousands of media files
already in the Firebase database.

--------------------------------------------------------------------------------

However, in the time since we reached out, it seems Nothing and Sunbird may have
blocked downloads of the app in the Play Store. Nothing Chats is not showing up
in Play Store search, and when navigating to the listing directly on multiple
Nothing Phone (2) units, the app was listed as “not available in your country”
as pictured above and unable for download, which appears to have changed in the
past several hours as the app was available for users yesterday after around
Noon ET.


9TO5GOOGLE’S TAKE

As far as privacy issues go, this is about as bad as it gets.


TOP COMMENT BY GORDON LUTZ

Liked by 15 people

From what I've read on forums it didn't sound like anyone even got the app to
actually work period.

I couldn't even create an Apple ID no matter what I tried, kept getting a
message saying it couldn't be done at this time.

The app didn't look that great anyways.

View all comments


Not only are image files accessible, but everything is out there and shockingly
easy to find. It’s unimaginably terrifying for your private data really, and
goes way beyond the concern everyone had of someone just having access to your
Apple ID.

While this ultimately is on Sunbird as it built out the infrastructure and the
Nothing Chats app, Nothing’s lack of due diligence here is worrying. If a
vulnerability like this could be found in less than 24 hours from multiple
users, how did Nothing miss it in the months this partnership was likely being
built out? And, beyond that, will something even worse be discovered over time?

It goes without saying at this point, but you absolutely should not download
Nothing Chats or Sunbird.

Dylan Roussel contributed to this article.

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AUTHOR

Ben Schoon nexusben

Ben is a Senior Editor for 9to5Google.

Find him on Twitter @NexusBen. Send tips to schoon@9to5g.com or encrypted to
benschoon@protonmail.com.

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