by Kastro
Paper/Archive/CVE-2021-32984

CVE-2021-32984

Automation Direct CLICK PLC CPU Modules: C0-1x CPUs — Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel

EPSS 1%CVSS 9.8
critical.is priorityof 100
43
CVSS 9.8 (CNA, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 66.0.660 × 2013.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
CLICK PLC CPU Modules: C0-1x CPUsunspecified – < 3.003.00CNA

Scores by source

icscert (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refcisa.gov/uscert/ics/advisories/icsa-21-166-02