ES File Explorer Vulnerabilities Puts 100 Million Users Data at Risk

The ES File Explorer is the most popular android file manager that has more than 500 million users worldwide according to the app developer. The app available on Google play since 2014, it help’s in managing your Android phone and tablet.

French security researcher who goes online with online handle Elliot Alderson discovered a vulnerability that allows attackers sitting on the same network can seize any files from your phone and to launch apps.

Once you launch the app it starts an HTTP server locally running on the port 59777, an attacker could send a JSON payload on this port to the victim device. The vulnerability can be tracked as CVE-2019-6447 affects 4.1.9.7.4 version and below.

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The TCP port remains open even after the app has been closed and continues to accept the unauthenticated json request over HTTP, reads the PoC published by Baptiste.

Proof Of Concept shows the following information can be retrived

• List all the files in the sdcard in the victim device
• List all the pictures in the victim device
• List all the videos in the victim device
• List all the audio files in the victim device
• List all the apps installed in the victim device
• List all the system apps installed in the victim device
• List all the phone apps installed in the victim device
• List all the apk files stored in the sdcard of the victim device
• List all the apps installed in the victim device
• Get device info of the victim device
• Pull a file from the victim device
• Launch an app of your choice
• Get the icon of an app of your choice

Security researcher Lukas Stefanko discovered another vulnerability in the ES File Explorer app that allows a local attacker to exploit the vulnerability and to intercept the traffic exchange.

Now the ES File Explorer fixed the HTTP vulnerability and the users who are using file explorer version below 4.1.9.7.4 are recommended to update with 4.1.9.9.

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