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ID

VDE-2018-015

Published

2018-09-21 09:03 (CEST)

Last update

2020-02-19 13:20 (CET)

Vendor(s)

PHOENIX CONTACT

Product(s)

Article number

Article

Affected Firmware versions

2701815

AXL F BK PN

up to and including 1.0.4

2688459

AXL F BK ETH

up to and including 1.12

2701949

AXL F BK ETH XC

up to and including 1.11

Summary

Incorrect handling request with non-standard symbols allows remote attackers to initiate a complete lock up of the bus coupler. Authentication of the request is not required.


Vuln. Type

Improper Input Validation  (CWE-20) 

Summary

Incorrect handling request with non-standard symbols allows remote attackers to initiate a complete lock up of the bus coupler. Authentication of the request is not required.

Impact

The device stops responding to any network or local port, consequently shutting down this part of the automation system. The bus coupler needs to be restarted by disconnecting the power supply.

Solution

Customers using affected Phoenix Contact AXL F BK are recommended to operate the devices in closed networks or protected with a suitable firewall.
For detailed information on our recommendations for measures to protect network-cabable devices, please refer to our application note:

https://www.phoenixcontact.com/assets/downloads_ed/local_pc/web_dwl_technical_info/ah_en_ industrial_security_107913_en_01.pdf

Reported by

This vulnerability was reported by Anne Borcherding, Steffen Pfrang, David Meier und Christian Haas from Fraunhofer IOSB.