CVE-2020-12521: Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: A specially crafted LLDP packet may lead to a high system load in the PROFINET stack.

Published Dec 17, 2020
·
Updated

On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot.

Affected Software

7 affected components
Phoenixcontact Plcnext Firmware<2021.0
Phoenixcontact Axc F 1152
Phoenixcontact Axc F 2152
Phoenixcontact Axc F 3152
Phoenixcontact Rfc 4072s
Phoenixcontact Axc F 2152 Starterkit
Phoenixcontact Plcnext Technology Starterkit

Remediation

Information

Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0 LTS or higher which fixes these vulnerabilities.

Event History

Dec 17, 2020
CVE Published
via MITRE·10:43 PM
Data Sourced
via MITRE·10:43 PM
RemedyDescriptionSeverityWeakness
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Frequently Asked Questions

1

What is CVE-2020-12521?

CVE-2020-12521 is a vulnerability on Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS that can lead to a high system load in the PROFINET stack and potentially cause failure of system services or a complete reboot.

2

How does CVE-2020-12521 affect Phoenix Contact PLCnext Control Devices?

CVE-2020-12521 affects Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS.

3

What is the severity of CVE-2020-12521?

CVE-2020-12521 has a severity rating of 6.5 (Medium).

4

How can an attacker exploit CVE-2020-12521?

An attacker can exploit CVE-2020-12521 by sending a specially crafted LLDP packet.

5

Is there a fix for CVE-2020-12521?

Yes, updating to Phoenix Contact PLCnext Control Devices version 2021.0 LTS or later will fix CVE-2020-12521.

Company

Resources

Contact

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