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MEDIUM · 6.5

CVE-2020-12521

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 serv...

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
PhoenixcontactPlcnext Firmware< 2021.0
PhoenixcontactAxc F 1152-
PhoenixcontactAxc F 2152-
PhoenixcontactAxc F 3152-
PhoenixcontactRfc 4072S-
PhoenixcontactAxc F 2152 Starterkit-
PhoenixcontactPlcnext Technology Starterkit-

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2020-12521?

CVE-2020-12521 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 serv...

How severe is CVE-2020-12521?

CVE-2020-12521 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-12521?

Check the references section above for vendor advisories and patch information. Affected products include: Phoenixcontact Plcnext Firmware, Phoenixcontact Axc F 1152, Phoenixcontact Axc F 2152, Phoenixcontact Axc F 3152, Phoenixcontact Rfc 4072S.