Vulnerability identifier: #VU29595

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-5598

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GOT2000 GT27 model
Server applications / SCADA systems
GOT2000 GT25 model
Server applications / SCADA systems
GOT2000 GT23 model
Server applications / SCADA systems

Vendor: Mitsubishi Electric

Description

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

The vulnerability exists due to improper access restrictions in the TCP/IP function. A remote attacker can use a specially crafted packet, bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GOT2000 GT27 model: All versions

GOT2000 GT25 model: All versions

GOT2000 GT23 model: All versions

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External links
http://jvn.jp/en/vu/JVNVU95413676/index.html
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_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. However, proof of concept for this vulnerability is available.