Authentication Bypass by Spoofing in Schneider Electric products - CVE-2021-22779

Vulnerability identifier: #VU54863

CSH Severity: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2021-22779

CWE-ID: CWE-290

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
EcoStruxure Process Expert
SCADAPack RemoteConnect for x70
SCADAPack 470
SCADAPack 474
SCADAPack 570
SCADAPack 574
SCADAPack 575 RTUs
EcoStruxure Control Expert
Modicon M580
Modicon M340

Software vendor:
Schneider Electric

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the authentication bypass by spoofing issue. A remote attacker can gain unauthorized access in read and write mode to the controller.

Install update from vendor's website.

• https://ics-cert.us-cert.gov/advisories/icsa-21-194-02
• https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-01
• https://ics-cert.kaspersky.com/advisories/2022/05/20/klcert-20-061-klcert-20-068-schneider-electric-modicon-m340-m580-authentication-bypass-by-spoofing/