PT-2022-10176 · Automationdirect · Automation Direct Click Plc Cpu Modules

Adeen Ayub + 2 · Published 2022-04-04 · Updated 2022-04-13 · CVE-2021-32984

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Automation Direct CLICK PLC CPU Modules: C0-1x CPUs versions prior to v3.00

Description The issue allows an attacker to connect to the PLC and read the project without authorization during the time it is unlocked by an authorized user, resulting in a privilege escalation. This occurs because all programming connections receive the same unlocked privileges.

Recommendations For Automation Direct CLICK PLC CPU Modules: C0-1x CPUs versions prior to v3.00, update the firmware to version v3.00 or later to resolve the issue. As a temporary workaround, consider restricting access to the PLC when it is unlocked by an authorized user to minimize the risk of exploitation.

Fix

Improper Authentication

Authentication Bypass Using an Alternate Path or Channel

Weakness Enumeration

CWE-287

CWE-288

Related Identifiers

CVE-2021-32984

Affected Products

Automation Direct Click Plc Cpu Modules

References · 5

• https://osv.dev/vulnerability/CVE-2021-32984 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32984 · Security Note
• https://t.me/cvenotify/28828 · Telegram Post
• https://t.me/cibsecurity/40131 · Telegram Post
• https://cisa.gov/uscert/ics/advisories/icsa-21-166-02 · Note