Bookeen Notea - Directory Traversal Vulnerability

# Exploit Title: Bookeen Notea - Directory Traversal
# Exploit Author: Clement MAILLIOUX
# Vendor Homepage: https://bookeen.com/
# Software Link: N/A
# Version: BK_R_1.0.5_20210608
# Tested on: Bookeen Notea (Android 8.1)
# CVE : CVE 2021-45783

# The affected version of the Bookeen Notea System Update is prone to directory traversal vulnerability related to its note Export function.
# The vulnerability can be triggered like so : 
# - Create a note or use an existing note on the device
# - rename this note ../../../../../../
# - keep touching the note until a menu appears
# - touch to select "export"
# - touch "View"

# Now you can access and explore the device filesystem.