Sensitive access tokens and keys found in hundreds of Android apps

The credentials provided access to accounts on Amazon Web Services, Slack, Dropbox, Twitter, and other services

Many developers still embed sensitive access tokens and API keys into their mobile applications, putting data and other assets stored on various third-party services at risk.

A new study performed by cybersecurity firm Fallible on 16,000 Android applications revealed that about 2,500 had some type of secret credential hard-coded into them. The apps were scanned with an online tool released by the company in November.

Hard-coding access keys for third-party services into apps can be justified when the access they provide is limited in scope. However, in some cases, developers include keys that unlock access to sensitive data or systems that can be abused.

This was the case for 304 apps found by Fallible that contained access tokens and API keys for services like Twitter, Dropbox, Flickr, Instagram, Slack, or Amazon Web Services (AWS).

Three hundred apps out of 16,000 might not seem like a lot, but, depending on its type and the privileges associated with it, a single leaked credential can lead to a massive data breach.

Slack tokens, for example, can provide access to chat logs used by development teams, and these can contain additional credentials for databases, continuous integration platforms, and other internal services, not to mention shared files and documents.

Last year, researchers from website security firm Detectify found more than 1,500 Slack access tokens that had been hard-coded into open source projects hosted on GitHub.

AWS access keys have also been found inside GitHub projects in the past by the thousands, forcing Amazon to start proactively scanning for such leaks and revoking the exposed keys.

Some of the AWS keys found in the analyzed Android apps had full privileges that allowed creating and deleting instances, the Fallible researchers said in a blog post.

Deleting AWS instances can lead to data loss and downtime, while creating them can provide attackers with computing power at the victims' expense.

This is not the first time when API keys, access tokens, and other secret credentials were found inside mobile apps. In 2015, researchers from Technical University in Darmstadt, Germany, uncovered more than 1,000 access credentials for Backend-as-a-Service (BaaS) frameworks stored inside Android and iOS applications. Those credentials unlocked access to more than 18.5 million database records containing 56 million data items that app developers stored on BaaS providers like Facebook-owned Parse, CloudMine, or AWS.

Earlier this month, a security researcher released an open-source tool called Truffle Hog that can help companies and individual developers scan their software projects for secret tokens that may have been added at some point and then forgotten about.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Lucian Constantin

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

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.

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?