Entries Tagged "Facebook"

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Changes in WhatsApp’s Privacy Policy

If you’re a WhatsApp user, pay attention to the changes in the privacy policy that you’re being forced to agree with.

In 2016, WhatsApp gave users a one-time ability to opt out of having account data turned over to Facebook. Now, an updated privacy policy is changing that. Come next month, users will no longer have that choice. Some of the data that WhatsApp collects includes:

  • User phone numbers
  • Other people’s phone numbers stored in address books
  • Profile names
  • Profile pictures and
  • Status message including when a user was last online
  • Diagnostic data collected from app logs

Under the new terms, Facebook reserves the right to share collected data with its family of companies.

EDITED TO ADD (1/13): WhatsApp tries to explain.

Posted on January 11, 2021 at 6:17 AMView Comments

Manipulating Systems Using Remote Lasers

Many systems are vulnerable:

Researchers at the time said that they were able to launch inaudible commands by shining lasers — from as far as 360 feet — at the microphones on various popular voice assistants, including Amazon Alexa, Apple Siri, Facebook Portal, and Google Assistant.

[…]

They broadened their research to show how light can be used to manipulate a wider range of digital assistants — including Amazon Echo 3 — but also sensing systems found in medical devices, autonomous vehicles, industrial systems and even space systems.

The researchers also delved into how the ecosystem of devices connected to voice-activated assistants — such as smart-locks, home switches and even cars — also fail under common security vulnerabilities that can make these attacks even more dangerous. The paper shows how using a digital assistant as the gateway can allow attackers to take control of other devices in the home: Once an attacker takes control of a digital assistant, he or she can have the run of any device connected to it that also responds to voice commands. Indeed, these attacks can get even more interesting if these devices are connected to other aspects of the smart home, such as smart door locks, garage doors, computers and even people’s cars, they said.

Another article. The researchers will present their findings at Black Hat Europe — which, of course, will be happening virtually — on December 10.

Posted on December 1, 2020 at 6:13 AMView Comments

Android Apps Stealing Facebook Credentials

Google has removed 25 Android apps from its store because they steal Facebook credentials:

Before being taken down, the 25 apps were collectively downloaded more than 2.34 million times.

The malicious apps were developed by the same threat group and despite offering different features, under the hood, all the apps worked the same.

According to a report from French cyber-security firm Evina shared with ZDNet today, the apps posed as step counters, image editors, video editors, wallpaper apps, flashlight applications, file managers, and mobile games.

The apps offered a legitimate functionality, but they also contained malicious code. Evina researchers say the apps contained code that detected what app a user recently opened and had in the phone’s foreground.

Posted on June 30, 2020 at 10:15 AMView Comments

Facebook Helped Develop a Tails Exploit

This is a weird story:

Hernandez was able to evade capture for so long because he used Tails, a version of Linux designed for users at high risk of surveillance and which routes all inbound and outbound connections through the open-source Tor network to anonymize it. According to Vice, the FBI had tried to hack into Hernandez’s computer but failed, as the approach they used “was not tailored for Tails.” Hernandez then proceeded to mock the FBI in subsequent messages, two Facebook employees told Vice.

Facebook had tasked a dedicated employee to unmasking Hernandez, developed an automated system to flag recently created accounts that messaged minors, and made catching Hernandez a priority for its security teams, according to Vice. They also paid a third party contractor “six figures” to help develop a zero-day exploit in Tails: a bug in its video player that enabled them to retrieve the real I.P. address of a person viewing a clip. Three sources told Vice that an intermediary passed the tool onto the FBI, who then obtained a search warrant to have one of the victims send a modified video file to Hernandez (a tactic the agency has used before).

[…]

Facebook also never notified the Tails team of the flaw — breaking with a long industry tradition of disclosure in which the relevant developers are notified of vulnerabilities in advance of them becoming public so they have a chance at implementing a fix. Sources told Vice that since an upcoming Tails update was slated to strip the vulnerable code, Facebook didn’t bother to do so, though the social media company had no reason to believe Tails developers had ever discovered the bug.

[…]

“The only acceptable outcome to us was Buster Hernandez facing accountability for his abuse of young girls,” a Facebook spokesperson told Vice. “This was a unique case, because he was using such sophisticated methods to hide his identity, that we took the extraordinary steps of working with security experts to help the FBI bring him to justice.”

I agree with that last paragraph. I’m fine with the FBI using vulnerabilities: lawful hacking, it’s called. I’m less okay with Facebook paying for a Tails exploit, giving it to the FBI, and then keeping its existence secret.

Another article.

EDITED TO ADD: This post has been translated into Portuguese.

Posted on June 12, 2020 at 6:23 AMView Comments

How Did Facebook Beat a Federal Wiretap Demand?

This is interesting:

Facebook Inc. in 2018 beat back federal prosecutors seeking to wiretap its encrypted Messenger app. Now the American Civil Liberties Union is seeking to find out how.

The entire proceeding was confidential, with only the result leaking to the press. Lawyers for the ACLU and the Washington Post on Tuesday asked a San Francisco-based federal court of appeals to unseal the judge’s decision, arguing the public has a right to know how the law is being applied, particularly in the area of privacy.

[…]

The Facebook case stems from a federal investigation of members of the violent MS-13 criminal gang. Prosecutors tried to hold Facebook in contempt after the company refused to help investigators wiretap its Messenger app, but the judge ruled against them. If the decision is unsealed, other tech companies will likely try to use its reasoning to ward off similar government requests in the future.

Here’s the 2018 story. Slashdot thread.

Posted on April 29, 2020 at 12:29 PMView Comments

Facebook's Download-Your-Data Tool Is Incomplete

Privacy International has the details:

Key facts:

  • Despite Facebook claim, “Download Your Information” doesn’t provide users with a list of all advertisers who uploaded a list with their personal data.
  • As a user this means you can’t exercise your rights under GDPR because you don’t know which companies have uploaded data to Facebook.
  • Information provided about the advertisers is also very limited (just a name and no contact details), preventing users from effectively exercising their rights.
  • Recently announced Off-Facebook feature comes with similar issues, giving little insight into how advertisers collect your personal data and how to prevent such data collection.

When I teach cybersecurity tech and policy at the Harvard Kennedy School, one of the assignments is to download your Facebook and Google data and look at it. Many are surprised at what the companies know about them.

Posted on March 2, 2020 at 6:28 AMView Comments

Reforming CDA 230

There’s a serious debate on reforming Section 230 of the Communications Decency Act. I am in the process of figuring out what I believe, and this is more a place to put resources and listen to people’s comments.

The EFF has written extensively on why it is so important and dismantling it will be catastrophic for the Internet. Danielle Citron disagrees. (There’s also this law journal article by Citron and Ben Wittes.) Sarah Jeong’s op-ed. Another op-ed. Another paper.

Here are good news articles.

Reading all of this, I am reminded of this decade-old quote by Dan Geer. He’s addressing Internet service providers:

Hello, Uncle Sam here.

You can charge whatever you like based on the contents of what you are carrying, but you are responsible for that content if it is illegal; inspecting brings with it a responsibility for what you learn.

-or-

You can enjoy common carrier protections at all times, but you can neither inspect nor act on the contents of what you are carrying and can only charge for carriage itself. Bits are bits.

Choose wisely. No refunds or exchanges at this window.

We can revise this choice for the social-media age:

Hi Facebook/Twitter/YouTube/everyone else:

You can build a communications based on inspecting user content and presenting it as you want, but that business model also conveys responsibility for that content.

-or-

You can be a communications service and enjoy the protections of CDA 230, in which case you cannot inspect or control the content you deliver.

Facebook would be an example of the former. WhatsApp would be an example of the latter.

I am honestly undecided about all of this. I want CDA230 to protect things like the commenting section of this blog. But I don’t think it should protect dating apps when they are used as a conduit for abuse. And I really don’t want society to pay the cost for all the externalities inherent in Facebook’s business model.

Posted on December 10, 2019 at 6:16 AMView Comments

WhatsApp Sues NSO Group

WhatsApp is suing the Israeli cyberweapons arms manufacturer NSO Group in California court:

WhatsApp’s lawsuit, filed in a California court on Tuesday, has demanded a permanent injunction blocking NSO from attempting to access WhatsApp computer systems and those of its parent company, Facebook.

It has also asked the court to rule that NSO violated US federal law and California state law against computer fraud, breached their contracts with WhatsApp and “wrongfully trespassed” on Facebook’s property.

This could be interesting.

EDITED TO ADD: Citizen Lab has a research paper in the technology involved in this case. WhatsApp has an op ed on their actions. And this is a good news article on how the attack worked.

EDITED TO ADD: Facebook is deleting the accounts of NSO Group employees.

EDITED TO ADD (11/13): Details on the vulnerability.

Posted on October 30, 2019 at 9:36 AMView Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.