#VU51954 Input validation error in ABB products - CVE-2021-27196

Vulnerability identifier: #VU51954

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-27196

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Relion 670 series
Server applications / SCADA systems
Relion 650 series
Server applications / SCADA systems
Relion SAM600-IO
Server applications / SCADA systems
RTU500 CMU
Hardware solutions / Firmware
REB500
Hardware solutions / Firmware
FOX615 TEGO1
Hardware solutions / Firmware
GMS600
Hardware solutions / Firmware
PWC600
Hardware solutions / Firmware
Modular Switchgear Monitoring (MSM)
Hardware solutions / Firmware

Vendor: ABB

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Relion 670 series: 1.1 - 2.2.3

Relion 650 series: 1.1 - 2.2.1

Relion SAM600-IO: 2.2.1

RTU500 CMU: 7.0 - 12.0

REB500: 7.3 - 8.3

FOX615 TEGO1: R1D02

GMS600: 1.3.0

PWC600: 1.0 - 1.1

Modular Switchgear Monitoring (MSM): before 2.1.0

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-096-01

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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.