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Olympia Protect 9061 Replay Attack

Olympia Protect 9061 Replay Attack
Posted Nov 23, 2016
Authored by Matthias Deeg

Olympia Protect 9061 article number 5943 revision 03 suffers from missing protection against replay attacks.

tags | advisory
MD5 | aef9f3339073a9ee80368ab5ac42e3e2

Olympia Protect 9061 Replay Attack

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Advisory ID: SYSS-2016-072
Product: Protect 9061
Manufacturer: Olympia
Affected Version(s): Article No. 5943 rev.03
Tested Version(s): Article No. 5943 rev.03
Vulnerability Type: Missing Protection against Replay Attacks
Risk Level: Medium
Solution Status: Fixed
Manufacturer Notification: 2016-07-21
Solution Date: 2016-11-14
Public Disclosure: 2016-11-23
CVE Reference: Not yet assigned
Author of Advisory: Matthias Deeg (SySS GmbH)



The Olympia Protect 9061 is a wireless alarm system with different

Some of the supported features as described by the manufacturer are
(see [1]):

Wireless alarm system with emergency call and handsfree function
Integrated GSM (Dual Band) phone dialling with message function
Handsfree/Room monitoring functions on the base unit
Up to 10 phone numbers can be programmed
Accoustic alarm via built-in sirene
Programme the forwarding of alarms to external telephones (e.g. mobile phones)
Alarm per Telephone with message function
Individual message for each sensor, max. 10 seconds long
Power failure backup in the base unit
Can be upgraded to support up to max. 32 sensors
Easy integration of the optional sensors via Plug & Play method

Due to an insecure implementation of the used 868 MHz radio
communication, the wireless alarm system Olympia Protect 9061 is
vulnerable to replay attacks.


Vulnerability Details:

SySS GmbH found out that the radio communication protocol used by the
Olympia Protect 9061 wireless alarm system and its remote control is not
protected against replay attacks. Therefore, an attacker can record the
radio signal of a wireless remote control, for example using a
software-defined radio, when the alarm system is disarmed by its owner,
and play it back at a later time in order to disable the alarm system at


Proof of Concept (PoC):

SySS GmbH could successfully perform a replay attack as described in the
previous section using a software-defined radio and disarm a Olympia
Protect 9061 wireless alarm system in an unauthorized way.



The reported security issue was fixed by the manufacturer in a new
product version.

Further information can be found via the following URL [2]:


Disclosure Timeline:

2016-07-21: Vulnerability reported to manufacturer
2016-08-25: Rescheduled publication date of the security advisory in
agreement with the manufacturer
2016-09-13: According to the manufacturer, a fix to the reported
security issue is available.
2016-10-06: The manufacturer presents the solution to the reported
security issue to SySS GmbH
2016-11-14: Manufacturer provides further information concerning
the security fix
2016-11-23: Public release of security advisory



[1] Product website for Olympia Protect 9061 wireless alarm system
[2] Information by the manufacturer concerning the security fix
[3] SySS Security Advisory SYSS-2016-072
[4] SySS GmbH, SySS Responsible Disclosure Policy



This security vulnerability was found by Matthias Deeg of SySS GmbH.

E-Mail: matthias.deeg (at)
Public Key:
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



Creative Commons - Attribution (by) - Version 3.0




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