Vulnerability identifier: #VU78939

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3373

CWE-ID: CWE-342

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GOT2000 GT21 model
Server applications / SCADA systems
GOT SIMPLE GS21 model
Server applications / SCADA systems

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to predictable exact value from previous values in the FTP server function. A remote attacker can guess the port number of a data connection and perform a denial of service (DoS) and spoofing attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GOT2000 GT21 model: 01.49.000

GOT SIMPLE GS21 model: 01.49.000

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External links
http://www.cisa.gov/news-events/ics-advisories/icsa-23-215-01
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-006_en.pdf
http://jvn.jp/vu/JVNVU92167394/index.html

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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.