Summary
Multiple vulnerabilities have been identified in PLCnext Control devices. Please consult the aforementioned CVE-IDs.
Details
Impact
See Impact for the listed CVE-IDs.
Mitigation
Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:Measures to protect network-capable devices with Ethernet connection (PDF)
Remediation
Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0 LTS or higher which fixes these vulnerabilities.
Vulnerabilities 4
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High 8.8
Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An authenticated low privileged user could embed malicious Javascript code to gain admin rights when the admin user visits the vulnerable website (local privilege escalation).
On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS an authenticated low privileged user could embed malicious Javascript code to gain admin rights when the admin user visits the vulnerable website (local privilege escalation).
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High 8.8
Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An attacker can use this vulnerability i.e. to open a reverse shell with root privileges.
On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS an attacker can use this vulnerability i.e. to open a reverse shell with root privileges.
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Medium 6.5
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.
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.
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Medium 5.5
Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An attacker can use the knowledge gained by reading the insufficiently protected sensitive information to plan further attacks.
On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS an attacker can use the knowledge gained by reading the insufficiently protected sensitive information to plan further attacks.
Revision history
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#1
Initial revision.
References
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VDE-2020-049: Phoenix Contact: Multiple vulnerabilities in PLCnext Control devices < 2021.0 LTS - HTML
https://certvde.com/en/advisories/VDE-2020-049/
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Vendor PSIRT
https://phoenixcontact.com/psirt
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CERT@VDE Security Advisories for Phoenix Contact GmbH & Co. KG
https://certvde.com/en/advisories/vendor/phoenixcontact/