Dropbox has said it needs to do a "better job" of communicating its OS X integration, after claims emerged online that its Mac app was phishing for user passwords and even "hacks" the operating system on installation.

Developers of the cloud storage service were forced to reply to accusations which appeared on Hacker News that the client app was a security risk and "couldn't be trusted", because of the way it takes control of system features without asking for permission to do so.

dropbox-privacy

Dropbox gains access to Accessibility features without requesting access.

Concerns were raised after it was demonstrated that Dropbox appears in the Security & Privacy tab for Accessibility, despite the fact that users are never prompted to grant access to the features.

Let’s assume for the sake of argument that Dropbox never does any evil on your computer. It remains the fact that the Dropbox process has that ability. And that means, if Dropbox itself has a bug in it, it’s possible an attacker could take control of your computer by hijacking flaws in Dropbox’s code. Of course, that’s entirely theoretical, but all security risks are until someone exploits them. The essence of good computer security and indeed the very reason why OSX has these kinds of safeguards in place to begin with is that apps should not have permissions greater than those that they need to do their job.


Responding to the accusations
, Dropbox said it only asks for the permissions it needs and uses the Accessibility features for certain app integrations like Office, although the permissions aren't as "granular" as the company would like.

Dropbox, like other apps, requires additional permissions to enable certain features and integrations. The operating system on a user's device may ask them to input their password to confirm. Dropbox never sees or receives these passwords. Reports of Dropbox spoofing interfaces, or capturing system passwords are absolutely false. We realize that we can do a better job communicating how these permissions are used, and we're working on improving this.

Dropbox said it was working with Apple to reduce its dependence on elevated access in macOS Sierra, and will respect when people disable Dropbox's Accessibility permissions. In the meantime, Hacker News wants the firm to more explicitly outline why it needs the permissions it does.

The latest news comes at a sensitive time for the cloud storage outfit. Two weeks ago, it was revealed that over 68 million Dropbox accounts were implicated in a hack that took place in 2012.

Due to a password hack connected to other websites, hackers were able to sign in to "a small number" of Dropbox accounts, said the company, including an employee's who had access to a document listing an array of user email addresses. But when Dropbox announced a preventative password reset measure, it made no mention of the extent of the users touched by the four-year-old hack.

Earlier this year, Dropbox was also forced to defend a feature called Project Infinite, which allows users to access all of the content in their account as if it is stored on their own machine, regardless of how small their hard disk is. The feature requires kernel-level access to computers in order to function, which critics suggested could leave it open to serious vulnerabilities.

Update: Dropbox has contacted MacRumors to reiterate that it "categorically denies" its Mac client phishes for user passwords or "hacks" the operating system on installation, but agreed that "we need to do more to be more transparent and make it clearer why we need access permission to a Mac OS". The company also added that the account information stolen in 2012 was hashed and salted, meaning it is unlikely hackers were able to obtain many of the users' actual passwords.

Tag: Dropbox

Top Rated Comments

Cindori Avatar
103 months ago
Except, if you read the blog, it's inherently clear that Dropbox spoofed the Apple password dialogue box. So they're still not owning up to it. They say it's an Apple OSX box thing, and while it's probably true that Dropbox doesn't see or capture the password you enter, it remains clear that the dialogue box is not really an Apple one.

This is the first big misunderstanding in this whole affair.
That dialogue is 100% genuine (called from Apple API's). You can customize the text that appears ("blabla for Dropbox to work correctly") using older C-API's that are still fully allowed. It is not a "custom Dropbox popup that can see your password".

This has been called out numerous times but unfortunately news articles can't keep up and that blog doesn't seem to want to edit the post (I'm guessing they're getting peak traffic from this story).

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

EDIT: Here is the actual API's to achieve this: https://developer.apple.com/library/mac/documentation/Security/Reference/authorization_ref/#//apple_ref/c/func/AuthorizationCopyRights

Parameter: environment
"Data used when authorizing or preauthorizing rights. Not used in OS X v10.2 and earlier. In OS X v10.3 and later, you can pass icon or prompt data to be used in the authentication dialog box"
Score: 16 Votes (Like | Disagree)
Mackker Avatar
103 months ago
Dropbox engineer's response is total ********!
Take a look at the attached images.
[doublepost=1473677349][/doublepost]
Fundementally, this whole kerfuffle comes from users not understanding what 'Allow the apps below to control your computer' in System Preferences actually means. Granted, that's a lot to do with Apple's poor wording, but it doesn't literally mean that at any time an application can take mouse & keyboard control or grant unauthorised remote access.

Due to how locked down the newer OSs are, it's not unusual for apps to need this enabled just to access features that were readily available on earlier OS X iterations.
No dude, there's no confusion here.
The problems are as follows:

1. Dropbox spoofs OSX's permissions dialog.
2. Dropbox enables special permissions on behalf of the user instead of letting OSX enabling permissions on behalf of its user (lol, see first point to understand why).
3. In order to be able to do point 2, Dropbox uses hacking tactics like modifying a system's database to force the OS to enable permissions (sudo, anyone? Point 1 again)
4. If an user tries to disable the unknowingly self-given permissions, magic happens! the agent re-enables itself!

That's PURE EVIL coming from Dropbox!

LE:
About UI Spoofing on OSX: http://www.symantec.com/connect/blogs/mac-os-x-dialog-box-spoofing-believe-me-i-m-system-preferences

LE2:
For people trying to prove that Dropbox isn't spoofing the permissions dialog, there's one more thing that might not be so obvious: how come Dropbox is able to insert its identifier in the Privacy Database?

As far as I know, this is only possible if it has the same access privileges as an Administrator or Super User.

So what I'm saying is that in my opinion, Dropbox really does cache the password and uses it to gain access to root and this thing goes all the way back to number one: in order to cache the password, they must have access to it right? So in order to get the password they spoof the permissions dialog.

Attachment Image

Attachment Image

Attachment Image

Attachment Image
Score: 14 Votes (Like | Disagree)
Sheza Avatar
103 months ago
Reports of Dropbox spoofing interfaces, [...] are absolutely false.
Except, if you read the blog, it's inherently clear that Dropbox spoofed the Apple password dialogue box. So they're still not owning up to it. They say it's an Apple OSX box thing, and while it's probably true that Dropbox doesn't see or capture the password you enter, it remains clear that the dialogue box is not really an Apple one.

Score: 13 Votes (Like | Disagree)
Cindori Avatar
103 months ago
But are they?
I think it's pretty obvious that they are. Why would they not? The API allows it.

The only confusion here stems from people without knowledge of these API's drawing conclusions like "they are using fake popups because the message is not like the standard popup!11!" in their efforts to find more "incriminating stuff" about Dropbox's practices.

As for their practices in general I personally think they are designed from a UX perspective - enter password once and be done with setup and not the "conspiracy-steal-password-control-your-computer-malware" FUD that is being spread right now.
Score: 8 Votes (Like | Disagree)
Nozuka Avatar
103 months ago
Either you trust them or you don't. If you don't, you shouldn't give them any of your files anyway. ;)
Score: 6 Votes (Like | Disagree)
Cindori Avatar
103 months ago
Could you please post a link to some documentation backing up what you're saying?
Found it: https://developer.apple.com/library/mac/documentation/Security/Reference/authorization_ref/#//apple_ref/c/func/AuthorizationCopyRights

This is straight from the documentation:

Parameter: environment
Data used when authorizing or preauthorizing rights. Not used in OS X v10.2 and earlier. In OS X v10.3 and later, you can pass icon or prompt data to be used in the authentication dialog box.

This is what Dropbox is using.
Score: 6 Votes (Like | Disagree)

Popular Stories

iPhone SE 4 Vertical Camera Feature

iPhone SE 4 Production Will Reportedly Begin Ramping Up in October

Tuesday July 23, 2024 2:00 pm PDT by
Following nearly two years of rumors about a fourth-generation iPhone SE, The Information today reported that Apple suppliers are finally planning to begin ramping up mass production of the device in October of this year. If accurate, that timeframe would mean that the next iPhone SE would not be announced alongside the iPhone 16 series in September, as expected. Instead, the report...
iPhone 17 Plus Feature

iPhone 17 Lineup Specs Detail Display Upgrade and New High-End Model

Monday July 22, 2024 4:33 am PDT by
Key details about the overall specifications of the iPhone 17 lineup have been shared by the leaker known as "Ice Universe," clarifying several important aspects of next year's devices. Reports in recent months have converged in agreement that Apple will discontinue the "Plus" iPhone model in 2025 while introducing an all-new iPhone 17 "Slim" model as an even more high-end option sitting...
Generic iPhone 17 Feature With Full Width Dynamic Island

Kuo: Ultra-Thin iPhone 17 to Feature A19 Chip, Single Rear Camera, Semi-Titanium Frame, and More

Wednesday July 24, 2024 9:06 am PDT by
Apple supply chain analyst Ming-Chi Kuo today shared alleged specifications for a new ultra-thin iPhone 17 model rumored to launch next year. Kuo expects the device to be equipped with a 6.6-inch display with a current-size Dynamic Island, a standard A19 chip rather than an A19 Pro chip, a single rear camera, and an Apple-designed 5G chip. He also expects the device to have a...
iPhone 16 Pro Sizes Feature

iPhone 16 Series Is Less Than Two Months Away: Everything We Know

Thursday July 25, 2024 5:43 am PDT by
Apple typically releases its new iPhone series around mid-September, which means we are about two months out from the launch of the iPhone 16. Like the iPhone 15 series, this year's lineup is expected to stick with four models – iPhone 16, iPhone 16 Plus, iPhone 16 Pro, and iPhone 16 Pro Max – although there are plenty of design differences and new features to take into account. To bring ...
icloud private relay outage

iCloud Private Relay Experiencing Outage

Thursday July 25, 2024 3:18 pm PDT by
Apple’s iCloud Private Relay service is down for some users, according to Apple’s System Status page. Apple says that the iCloud Private Relay service may be slow or unavailable. The outage started at 2:34 p.m. Eastern Time, but it does not appear to be affecting all iCloud users. Some impacted users are unable to browse the web without turning iCloud Private Relay off, while others are...
iPhone 17 Plus Feature Purple

iPhone 17 Rumored to Feature Mechanical Aperture

Tuesday July 23, 2024 9:32 am PDT by
Apple is planning to release at least one iPhone 17 model next year with mechanical aperture, according to a report published today by The Information. The mechanical system would allow users to adjust the size of the iPhone 17's aperture, which refers to the opening of the camera lens through which light enters. All existing iPhone camera lenses have fixed apertures, but some Android...