Baidu web browsers leaked sensitive information, researchers say

Baidu has fixed some of the issues, but others remain

Two web browsers developed by Chinese search giant Baidu have been insecurely transmitting sensitive data across the Internet, putting users' privacy at risk, according to a new study.

Baidu responded by releasing software fixes, but researchers say not all the issues have been resolved.

The study was published Tuesday by Citizen Lab, a research group that's part of the University of Toronto. 

It focused on the Windows and Android versions of Baidu's browser, which are free products. It also found that sensitive data was leaked by thousands of apps that use a Baidu SDK (software development kit).

With the browsers, Citizen Lab found that a user's search terms, GPS coordinates, the addresses of websites visited and device's MAC (Media Access Control) address were sent to Baidu's servers without using SSL/TLS encryption.

"The transmission of personal data without properly implemented encryption can expose a user's data to surveillance," the report noted.

Other sensitive information, such as IMEI (International Mobile Station Equipment Identity) numbers, nearby Wi-Fi networks and their MAC addresses, and hard-drive serial numbers were transmitted with weak encryption that could be broken.

Neither web browser used digital code signatures for updates, meaning attackers could try to slip in their own code instead.

The government of China strictly controls Internet use, and Baidu can be required to hand over user data to intelligence agencies and law enforcement. The data collection raises questions about whether it could be used against those who oppose government policies.

"While Internet companies often collect personal user data for the normal and efficient provision of services, it is unclear why Baidu Browser collects and transmits such an extensive range of sensitive user data points," the report said.

Citizen Lab also found that thousands of mobile apps that use Baidu's mobile analytics SDK transmit the same sensitive information back to the company.

"Any app that uses this SDK for statistics and event tracking sends messages to Baidu’s servers," the report said.

Baidu officials could not be immediately reached for comment, but Citizen Lab published a document with questions it posed and answers from the company.

Baidu doesn't answer a question about what user data is it required to retain under Chinese law. It also says it was unable to comment on why requests using its browsers to visit websites outside of China went through a proxy server.

But Baidu said it has improved security based on the researchers' findings. For example, it said data transmitted by the Android browser would be fully encrypted by the end of this month, and for the Windows browser by early May.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jeremy Kirk

IDG News Service
Show Comments

Cool Tech

Breitling Superocean Heritage Chronographe 44

Learn more >

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?