Advisory ID: SYSS-2022-013 Product: Executive Fingerprint Secure SSD Manufacturer: Verbatim Affected Version(s): GDMSFE01-INI3637-C VER1.1 Tested Version(s): GDMSFE01-INI3637-C VER1.1 Vulnerability Type: Insufficient Verification of Data Authenticity (CWE-345) Risk Level: Low Solution Status: Open Manufacturer Notification: 2022-02-03 Solution Date: - Public Disclosure: 2022-06-08 CVE Reference: CVE-2022-28385 Author of Advisory: Matthias Deeg (SySS GmbH) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: The Verbatim Executive Fingerprint Secure SSD is a USB drive with AES 256-bit hardware encryption and a built-in fingerprint sensor for unlocking the device with previously registered fingerprints. The manufacturer describes the product as follows: "The AES 256-bit Hardware Encryption seamlessly encrypts all data on the drive in real-time. The drive is compliant with GDPR requirements as 100% of the drive is securely encrypted. The built-in fingerprint recognition system allows access for up to eight authorised users and one administrator who can access the device via a password. The SSD does not store passwords in the computer or system's volatile memory making it far more secure than software encryption."[1] Due to missing integrity checks, an attacker can manipulate the content of the emulated CD-ROM drive containing the Windows and macOS client software. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: When analyzing the Verbatim Executive Fingerprint Secure SSD, Matthias Deeg found out that the content of the emulated CD-ROM drive containing the Windows and macOS client software can be manipulated. The content of this emulated CD-ROM drive is stored as ISO-9660 image in the "hidden" sectors of the USB drive that can only be accessed using special IOCTL commands, or when installing the drive in an external disk enclosure. The following output exemplarily shows the content of the ISO-9660 file system: # mount hidden_sectors.bin /mnt/ # lsd -laR /mnt/ dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . drwxr-xr-x root root 4.0 KB Fri Jan 7 16:39:47 2022  .. .r-xr-xr-x root root 70 B Wed Aug 14 09:20:40 2019  Autorun.inf dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  MAC dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Windows /mnt/MAC: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  setup.app dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Source /mnt/MAC/setup.app: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Contents /mnt/MAC/setup.app/Contents: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  _CodeSignature .r-xr-xr-x root root 1.4 KB Thu Oct 24 06:58:18 2019  Info.plist dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  MacOS .r-xr-xr-x root root 8 B Thu Oct 24 06:58:18 2019  PkgInfo dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Resources /mnt/MAC/setup.app/Contents/_CodeSignature: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 3.6 KB Thu Oct 24 07:06:02 2019  CodeResources /mnt/MAC/setup.app/Contents/MacOS: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 30 KB Thu Oct 24 07:06:02 2019  setup /mnt/MAC/setup.app/Contents/Resources: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Base.lproj /mnt/MAC/setup.app/Contents/Resources/Base.lproj: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Main.storyboardc /mnt/MAC/setup.app/Contents/Resources/Base.lproj/Main.storyboardc: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 445 B Thu Oct 24 06:58:18 2019  Info.plist .r-xr-xr-x root root 35 KB Thu Oct 24 06:58:18 2019  MainMenu.nib .r-xr-xr-x root root 3.5 KB Thu Oct 24 06:58:18 2019  NSWindowController-B8D-0N-5wS.nib .r-xr-xr-x root root 1.2 KB Thu Oct 24 06:58:18 2019  XfG-lQ-9wD-view-m2S-Jp-Qdl.nib /mnt/MAC/Source: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 5.9 MB Mon Jul 22 06:22:24 2019  gtk_dylib.tar .r-xr-xr-x root root 1.0 MB Thu Oct 24 07:23:30 2019  VERBATIM_FPTOOL_B0_V1.2.tar /mnt/Windows: r-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 5.6 KB Fri Aug 9 10:47:26 2019  English.txt .r-xr-xr-x root root 6.6 KB Fri Aug 9 10:47:26 2019  French.txt .r-xr-xr-x root root 6.2 KB Fri Aug 9 10:47:26 2019  German.txt dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  Ico .r-xr-xr-x root root 6.2 KB Fri Aug 9 10:47:26 2019  Italian.txt .r-xr-xr-x root root 512 B Fri Aug 9 10:47:26 2019  license.bin .r-xr-xr-x root root 160 KB Fri Aug 9 10:47:26 2019  odbccp32.dll .r-xr-xr-x root root 7.1 KB Fri Aug 9 10:47:26 2019  Spanish.txt .r-xr-xr-x root root 4.9 MB Wed Apr 1 09:28:53 2020  VerbatimSecure.exe /mnt/Windows/Ico: dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  . dr-xr-xr-x root root 2.0 KB Wed Apr 1 09:29:50 2020  .. .r-xr-xr-x root root 34 KB Fri Aug 9 10:47:26 2019  Verbatim.ico By manipulating this ISO-9660 image or replacing it with another one, an attacker is able to store malicious software on the emulated CD-ROM drive which then may get executed by an unsuspecting victim when using the device. For example, an attacker with temporary physical access during the supply could program a modified ISO-9660 image on the Verbatim Executive Fingerprint Secure SSD, which always uses an attacker-controlled password for unlocking the device. If, later on, the attacker gains access to the used USB drive, he can simply decrypt all contained user data. Storing arbitrary other malicious software is also possible. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): SySS could successfully modify the content of the ISO-9660 image containing the Windows and macOS software for unlocking and managing the Verbatim Executive Fingerprint Secure SSD. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: SySS GmbH is not aware of a solution for the described security issue. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2022-02-03: Vulnerability reported to manufacturer 2022-02-11: Vulnerability reported to manufacturer again 2022-03-07: Vulnerability reported to manufacturer again 2022-06-08: Public release of security advisory ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Product website for Verbatim Executive Fingerprint Secure SSD https://www.verbatim-europe.co.uk/en/prod/executive-fingerprint-secure-ssd-usb-32-gen-1--usb-c-1tb-53657/ [2] SySS Security Advisory SYSS-2022-013 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2022-013.txt [3] SySS GmbH, SySS Responsible Disclosure Policy https://www.syss.de/en/responsible-disclosure-policy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Matthias Deeg of SySS GmbH. E-Mail: matthias.deeg (at) syss.de Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Matthias_Deeg.asc Key fingerprint = D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer: The information provided in this security advisory is provided "as is" and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible. The latest version of this security advisory is available on the SySS website. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Copyright: Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en