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ID

VDE-2020-047

Published

2020-12-02 10:00 (CET)

Last update

2020-12-02 10:00 (CET)

Vendor(s)

PHOENIX CONTACT GmbH & Co. KG

Product(s)

Article No┬░ Product Name Affected Version(s)
1050387 BTP 2043W all versions
1046666 BTP 2070W all versions
1046667 BTP 2102W all versions

Summary

Uncontrolled Resource Consumption can be exploited to cause the HMI to become unresponsive and not accurately update the display content (Denial of Service).


Weakness

Uncontrolled Resource Consumption  (CWE-400) 

Summary

Uncontrolled Resource Consumption can be exploited to cause the Phoenix Contact HMIs BTP 2043W, BTP 2070W and BTP 2102W in all versions to become unresponsive and not accurately update the display content (Denial of Service).


Impact

When the HMI is subjected to i.e. a rapid flood of ICMP ping packets, the HMI stops responding to user input and the running program provides no visual changes. Once the attack stops, the HMI will return to normal functionality.

Solution

Mitigation

Phoenix Contact recommends operating network-capable devices in closed networks or
protected with a suitable firewall. For detailed information on the recommendations for measures
to protect network-capable devices, please refer to the Phoenix Contact application note:

Measures to protect network-capable devices with Ethernet connection

Reported by

This vulnerability was discovered by Richard Thomas and Tom Chothia of University of Birmingham.