Improper Authentication in Mitsubishi Electric GOT



Published: 2021-04-23
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2021-20590
CWE-ID CWE-287
Exploitation vector Network
Public exploit N/A
Vulnerable software
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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

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU52505

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 - Improper Authentication

Exploit availability: No

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

External links

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


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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