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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.

Quick assessment

Affected
Phoenix Contact AXC F 1152 (1151412)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Phoenix Contact PLCnext Control Devices是德国Phoenix Contact公司的一款应用于工业环境可编程逻辑控制器。 Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS 存在安全漏洞，该漏洞源于一个特别设计的LLDP包可能会导致PROFINET堆栈中的高系统负载。攻击者可利用该漏洞可能导致系统服务失败或完全重新引导。

CVSS 6.5 · Medium EPSS 0.46% · P38
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I. Basic Information for CVE-2020-12521

Vulnerability Information
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Vulnerability Title
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.
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Phoenix Contact PLCnext Control Devices 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Phoenix Contact PLCnext Control Devices是德国Phoenix Contact公司的一款应用于工业环境可编程逻辑控制器。 Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS 存在安全漏洞，该漏洞源于一个特别设计的LLDP包可能会导致PROFINET堆栈中的高系统负载。攻击者可利用该漏洞可能导致系统服务失败或完全重新引导。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Phoenix Contact AXC F 1152 (1151412) unspecified ~ 2021.0 LTS -
Phoenix Contact AXC F 2152 (2404267) unspecified ~ 2021.0 LTS -
Phoenix Contact AXC F 3152 (1069208) unspecified ~ 2021.0 LTS -
Phoenix Contact RFC 4072S (1051328 unspecified ~ 2021.0 LTS -
Phoenix Contact AXC F 2152 Starterkit (1046568) unspecified ~ 2021.0 LTS -
Phoenix Contact PLCnext Technology Starterkit (1188165) unspecified ~ 2021.0 LTS -

II. Public POCs for CVE-2020-12521

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III. Intelligence Information for CVE-2020-12521

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Other References for CVE-2020-12521 (1)

Same Patch Batch · Phoenix Contact · 2020-12-17 · 5 CVEs total

CVE-2020-12517 8.8 HIGH Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An authenticated low p
CVE-2020-12519 8.8 HIGH Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An attacker can use th
CVE-2020-12518 5.5 MEDIUM Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An attacker can use th
CVE-2020-12523 5.4 MEDIUM Phoenix Contact mGuard Devices versions before 8.8.3: LAN ports get functional after reboo

IV. Related Vulnerabilities

Same product: AXC F 1152 (1151412)
Same vendor: Phoenix Contact
Same weakness: CWE-20

V. Comments for CVE-2020-12521

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