Vulnerability identifier: #VU52505

Vulnerability risk: Medium

CVSSv3.1: 5.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-20590

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GOT2000 GT27 model
Server applications / SCADA systems
GOT2000 GT25 model
Server applications / SCADA systems
GOT2000 GT21 model
Server applications / SCADA systems
GOT2000 GT2107-WTBD
Server applications / SCADA systems
GOT2000 GT2107-WTSD
Server applications / SCADA systems
GOT SIMPLE GS21 model
Server applications / SCADA systems
GOT SIMPLE GS2110-WTBD-N
Server applications / SCADA systems
GOT SIMPLE GS2107-WTBD-N
Server applications / SCADA systems

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in the VNC function. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

GOT2000 GT27 model: All versions

GOT2000 GT25 model: All versions

GOT2000 GT21 model: All versions

GOT2000 GT2107-WTBD: All versions

GOT2000 GT2107-WTSD: All versions

GOT SIMPLE GS21 model: All versions

GOT SIMPLE GS2110-WTBD-N: All versions

GOT SIMPLE GS2107-WTBD-N: All versions

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External links
http://jvn.jp/vu/JVNVU97615777/index.html
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-001_en.pdf

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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.