usbsas is a free and open source (GPLv3) tool and framework for securely reading untrusted USB mass storage devices.

Overview

Following the concept of defense in depth and the principle of least privilege, usbsas's goal is to reduce the attack surface of the USB stack. To achieve this, most of the USB related tasks (parsing USB packets, SCSI commands, file systems etc.) usually executed in (privileged) kernel space has been moved to user space and separated in different processes (microkernel style), each being executed in its own restricted secure computing mode. It works on GNU/Linux and is written in Rust.

Use cases

kiosk / sheep dip station to securely transfer files from an untrusted USB device to a trusted one
forensic analysis of untrusted USB devices

Key features

read files from an untrusted USB device (without using kernel modules like uas, usb_storage and the file system ones)
analyze files with a remote antivirus platform
copy files on a new file system to a trusted USB device
upload files to a remote server
make an image of a USB device
wipe a USB device
mount (read-only) a USB device

Documentation

Contributing

Any contribution is welcome, be it code, bug report, packaging, documentation or translation.

License

Dependencies included in this project:

ntfs3g is GPLv2 (see usbsas-fsrw/ntfs3g/src/ntfs-3g/COPYING).
FatFs has a custom BSD-style license (see usbsas-fsrw/ff/src/ff/LICENSE.txt)

usbsas is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

usbsas is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with usbsas. If not, see the gnu.org web site.

usbsas