PT-2020-13154 · Phoenix Contact · Plcnext Control Devices

Published 2020-12-17 · Updated 2020-12-21 · CVE-2020-12521

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Phoenix Contact PLCnext Control Devices versions prior to 2021.0 LTS

Description A specially crafted LLDP packet may lead to a high system load in the PROFINET stack, causing failure of system services or a complete reboot.

Recommendations For versions prior to 2021.0 LTS, update to version 2021.0 LTS or later to resolve the issue. As a temporary workaround, consider restricting the reception of LLDP packets to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2020-12521

Affected Products

Plcnext Control Devices

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2020-12521 · Security Note
• https://osv.dev/vulnerability/CVE-2020-12521 · Vendor Advisory
• https://t.me/cibsecurity/21027 · Telegram Post
• https://cert.vde.com/en-us/advisories/vde-2020-049 · Note