Advisory ID: SYSS-2017-010
Product: Wireless Mouse (part of Wireless Desktop Set ERK-321A, which is shipped together with HP Elite Slice)
Affected Version(s): MORFGIUO
Tested Version(s): MORFGIUO
Vulnerability Type: Insufficient Verification of Data Authenticity (CWE-345)
Mouse Spoofing Attack
Risk Level: Medium
Solution Status: Open
Manufacturer Notification: 2017-03-02
Solution Date: -
Public Disclosure: 2017-05-08
CVE Reference: Not yet assigned
Authors of Advisory: Micha Borrmann and Matthias Deeg (SySS GmbH)
HP ERK-321A is a wireless desktop set consisting of a mouse and a
Due to unencrypted and unauthenticated mouse data communication, the
wireless desktop set HP ERK-321A is prone to mouse spoofing attacks.
SySS GmbH found out that the mouse (model MORFGIUO) of the wireless
desktop set HP ERK-321A is prone to spoofing attacks, as the mouse
data communication is unencrypted and unauthenticated.
An attacker can analyze the unencrypted mouse data packets of the 2.4
GHz radio communication sent by the mouse to the receiver (USB dongle)
in order to learn the used protocol. By knowing the used mouse data
protocol, it is possible to spoof mouse actions like mouse movements
or mouse clicks by sending forged data packets.
Thus, an attacker is able to remotely control the mouse pointer of a
target system that is operated with the wireless desktop set HP
ERK-321A. If the graphical user interface of the victim's system is
unlocked, an attacker can for example send a list of mouse actions
that start the virtual on-screen keyboard of the operating system and
execute arbitrary commands in the context of the currently logged in
user, for instance a download and execute attack vector.
As the attacker may not have an unobstructed view to the target
system's screen and may not know the used operating system, the screen
resolution, or the current mouse settings, this kind mouse spoofing
attack is based on heuristics. But concerning an unlocked and
unattended system, an attacker can simply try different attack vectors
for different target system configurations sequentially.
Proof of Concept (PoC):
The SySS GmbH could successfully perform mouse spoofing attacks
against a target system operated with the wireless desktop set HP
ERK-321A using an in-house developed software tool in combination with
the USB radio dongle Logitech Unifying receiver (model C-U0007) and the
RFStorm nRF24LU1+ Research Firmware developed by Bastille .
The SySS GmbH is not aware of a solution for this reported security
For further information please contact the manufacturer.
2017-02-21: Detection of the vulnerability
2017-03-02: Vulnerability reported to manufacturer
2017-05-08: Public release of the security advisory
 RFStorm nRF24LU1+ Research Firmware
 SySS Security Advisory SYSS-2017-010
 SySS Responsible Disclosure Policy
This security vulnerability was found by Micha Borrmann and Matthias Deeg
of SySS GmbH.
E-Mail: micha.borrmann (at) syss.de
Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Micha_Borrmann.asc
Key Fingerprint: F2E7 C6A5 9950 84ED 7AD6 0DD4 EDBE 26E7 14EA 5876
E-Mail: matthias.deeg (at) syss.de
Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Matthias_Deeg.asc
Key fingerprint: D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB
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 Web
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