#VU54863 Authentication Bypass by Spoofing in Schneider Electric products - CVE-2021-22779

Vulnerability identifier: #VU54863

Vulnerability risk: High

CVSSv4.0: 7.2 [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: Network

Exploit availability: No

Vulnerable software:
EcoStruxure Process Expert
Server applications / SCADA systems
SCADAPack RemoteConnect for x70
Server applications / SCADA systems
SCADAPack 470
Server applications / SCADA systems
SCADAPack 474
Server applications / SCADA systems
SCADAPack 570
Server applications / SCADA systems
SCADAPack 574
Server applications / SCADA systems
SCADAPack 575 RTUs
Server applications / SCADA systems
EcoStruxure Control Expert
Server applications / SCADA systems
Modicon M580
Hardware solutions / Firmware
Modicon M340
Hardware solutions / Firmware

Vendor: Schneider Electric

Description

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

EcoStruxure Process Expert: before V2021

SCADAPack RemoteConnect for x70: All versions

SCADAPack 470: All versions

SCADAPack 474: All versions

SCADAPack 570: All versions

SCADAPack 574: All versions

SCADAPack 575 RTUs: All versions

Modicon M580: All versions

Modicon M340: before 3.50

EcoStruxure Control Expert: 15.0 SP1

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External links
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/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.