#VU58817 Improper access control in ABB products - CVE-2021-35534

Vulnerability identifier: #VU58817

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-35534

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GMS600
Hardware solutions / Firmware
PWC600
Hardware solutions / Firmware
Relion 670 series
Server applications / SCADA systems
Relion 650 series
Server applications / SCADA systems
Relion SAM600-IO
Server applications / SCADA systems

Vendor: ABB

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote administrator can bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GMS600: 1.2.0 - 1.3.1.0

PWC600: 1.0.1.0 - 1.1.0.1

Relion 670 series: 2.0 - 2.2.5

Relion 650 series: 1.0 - 2.2.5

Relion SAM600-IO: 2.2.1 - 2.2.5.1

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External links
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000059&LanguageCode=en&DocumentPartId=&Action=Launch
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000058&LanguageCode=en&DocumentPartId=&Action=Launch
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000060&LanguageCode=en&DocumentPartId=&Action=Launch

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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