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CVE-2021-32978— Automation Direct CLICK PLC CPU Modules Plaintext Storage of a Password

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，该漏洞允许攻击者读取以前输入的密码和锁定状态。如果之前输入的密码成功，攻击者可利用该漏洞就可以使用该密码解锁PLC。

CVSS 7.5 · High EPSS 1.01% · P63

Possible ATT&CK Techniques 1 AI

T1098 · Account Manipulation
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I. Basic Information for CVE-2021-32978

Vulnerability Information
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Vulnerability Title
Automation Direct CLICK PLC CPU Modules Plaintext Storage of a Password
Source: CVE Program / CVE List V5
Vulnerability Description
The programming protocol allows for a previously entered password and lock state to be read by an attacker. If the previously entered password was successful, the attacker can then use the password to unlock Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
明文存储口令
Source: CVE Program / CVE List V5
Vulnerability Title
CLICK PLC CPU Modules 安全漏洞
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，该漏洞允许攻击者读取以前输入的密码和锁定状态。如果之前输入的密码成功，攻击者可利用该漏洞就可以使用该密码解锁PLC。
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-2021-32978

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III. Intelligence Information for CVE-2021-32978

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Vendor Advisories for CVE-2021-32978 (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-2021-32984 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-2021-32982 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-256