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CVE-2021-32984— Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel

Quick assessment

Affected
Automation Direct CLICK PLC CPU Modules: C0-1x CPUs
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.

CLICK PLC CPU Modules是Automation Direct的网络设备一个 CLICK CPU 模块最多可以连接 8 个 I/O 模块，以扩展系统 I/O 数量并满足特定应用的需要。 Automation Direct CLICK PLC CPU Modules 存在安全漏洞，该漏洞导致特权升级，攻击者可利用该漏洞可以在未经授权的情况下连接PLC读取项目。

CVSS 9.8 · Critical EPSS 1.10% · P63

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2021-32984

Vulnerability Information
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Vulnerability Title
Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel
Source: CVE Program / CVE List V5
Vulnerability Description
All programming connections receive the same unlocked privileges, which can result in a privilege escalation. During the time Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, an attacker can connect to the PLC and read the project without authorization.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
CLICK PLC CPU Modules 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CLICK PLC CPU Modules是Automation Direct的网络设备一个 CLICK CPU 模块最多可以连接 8 个 I/O 模块，以扩展系统 I/O 数量并满足特定应用的需要。 Automation Direct CLICK PLC CPU Modules 存在安全漏洞，该漏洞导致特权升级，攻击者可利用该漏洞可以在未经授权的情况下连接PLC读取项目。
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
Automation Direct CLICK PLC CPU Modules: C0-1x CPUs unspecified ~ 3.00 -

II. Public POCs for CVE-2021-32984

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III. Intelligence Information for CVE-2021-32984

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Vendor Advisories for CVE-2021-32984 (1)

Same Patch Batch · Automation Direct · 2022-04-04 · 5 CVEs total

CVE-2021-32980 9.8 CRITICAL Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or C
CVE-2021-32986 9.8 CRITICAL Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or C
CVE-2021-32978 7.5 HIGH Automation Direct CLICK PLC CPU Modules Plaintext Storage of a Password
CVE-2021-32982 7.5 HIGH Automation Direct CLICK PLC CPU Modules Cleartext Transmission of Sensitive Information

IV. Related Vulnerabilities

Same product: CLICK PLC CPU Modules: C0-1x CPUs
Same vendor: Automation Direct
Same weakness: CWE-288

V. Comments for CVE-2021-32984

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