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.
First published: Thu 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.
Credit: info@cert.vde.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| phoenixcontact PLCnext firmware | <2021.0 | |
| Phoenix Contact Axc F 1152 | ||
| Phoenix Contact Axioline F AXL F 2152 Firmware | ||
| Phoenix Contact AXC F 3152 Firmware | ||
| Phoenix Contact RFC 4072S | ||
| phoenixcontact axc f 2152 starterkit | ||
| Phoenix Contact PLCnext Technology Starterkit Firmware |
Remedy
Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0 LTS or higher which fixes these vulnerabilities.
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Reference Links
Frequently Asked Questions
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.
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.
What is the severity of CVE-2020-12521?
CVE-2020-12521 has a severity rating of 6.5 (Medium).
How can an attacker exploit CVE-2020-12521?
An attacker can exploit CVE-2020-12521 by sending a specially crafted LLDP packet.
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.
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- canonical/phoenix contact plcnext technology starterkit firmware