Unprotected storage of credentials in CLICK PLC CPU Module C0-1x CPUs - CVE-2021-32978
Published: June 17, 2021
Vulnerability identifier: #VU54187
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-32978
CWE-ID: CWE-256
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to other users' credentials.
The vulnerability exists due to the programming protocol allows for a previously entered password and lock state to be read by an attacker. A remote attacker can use the password to unlock the PLC.
Affected software
CLICK PLC CPU Module C0-1x CPUs
How to mitigate CVE-2021-32978
Install updates from vendor's website.
CLICK PLC CPU Module C0-1x CPUs - update to 3.00