Alternative fixes released for Android 'master key' vulnerability

Many Android devices may still be vulnerable if operators haven't sent out updates

More fixes are appearing for a pair of highly dangerous vulnerabilities exposed earlier this month in the Android mobile operating system.

Security vendor Webroot and ReKey, a collaboration between Northeastern University in Boston and vendor Duo Security, released software on Tuesday that detects if an Android device is vulnerable and applies a patch.

Google, which manages the open-source Android project, quickly issued patches for the so-called "master key" vulnerabilities, one of which was found by Bluebox Security and another one that appeared on a Chinese-language forum.

But mobile phone manufacturers and operators are often very slow in releasing patches to their users, a problem that is likely to become more critical as mobile device use rises.

The result is a large number of users running vulnerable devices. More than 156 million Android smartphones were sold in the first three months of this year worldwide, amounting to a 74 percent market share, according to analyst Gartner.

The vulnerability found by Bluebox may affect more 900 million devices made over the last four years running Android versions 1.6 and higher.

The vulnerabilities are particularly dangerous since they allow an attacker to modify an Android package file, which is used to install an application, without affecting its original cryptographic signature.

The signature is generated by the application's author and is used to verify the program's integrity. By using the vulnerability and maliciously modifying an application, a hacker could gain complete control over an Android device.

ReKey is an application that applies the Google patches. It also will alert users if an application tries to install itself using the vulnerabilities. ReKey needs root access to a device, which is normally not granted to most applications, in order to patch vulnerabilities.

Webroot wrote on Tuesday that it has deployed a patch within its SecureAnywhere Mobile product, which also covers Android's Jelly Bean 4.1 and Ice Cream Sandwich releases.

Bluebox also has an application that detects if a device is vulnerable and scans for malicious applications.

In order to protect users, Google is scanning applications in its Play store to ensure those programs are legitimate. Android also has a feature, called "Verify Apps," which allows Google to vet applications before installation.

Application markets and websites not run by Google have posed a risk for Android users. Security researchers have found numerous examples of popular applications that have been modified to deliver secret code that can spy on users.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags securitymalwareGoogleWebrootNortheastern UniversityExploits / vulnerabilitiesAndroid OSDuo Security

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

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?