PHOENIX CONTACT: BTP Touch Panels uncontrolled resource consumption

Uncontrolled Resource Consumption Vulnerability (CWE-400) was discovered at Touch-Panels of the BTP series.

VDE-2020-047 (2020-12-02 11:00 UTC+0200)

CVE Identifier

CVE-2020-12524

Affected Vendors

Phoenix Contact

Affected Products

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).

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

Temporary Fix / 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.