Active Debug Code in Mitsubishi Electric MELSEC WS Series

1) Active Debug Code

EUVDB-ID: #VU76370

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-1618

CWE-ID: CWE-489 - Active Debug Code

Exploit availability: No

Description

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

The vulnerability exists due to the hidden telnet function is enabled by default when shipped from the factory. A remote attacker can log into the affected module by connecting to it via telnet.

Mitigation

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

Vulnerable software versions

WS0-GETH00200: All versions

External links

http://www.cisa.gov/news-events/ics-advisories/icsa-23-138-02
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-002_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 device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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