Predictable Exact Value from Previous Values in Mitsubishi Electric GOT2000 and GOT SIMPLE

1) Predictable Exact Value from Previous Values

EUVDB-ID: #VU78939

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 - Predictable Exact Value from Previous Values

Exploit availability: No

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

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

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.