Active Debug Code in Mitsubishi Electric MELFA SD/SQ series and F-series

1) Active Debug Code

EUVDB-ID: #VU71607

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33323

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 active debug code issue. A remote attacker can gain unauthorized access to a robot controller by performing an unauthorized telnet login.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MELFA SD Series: R7x - S7x

MELFA SQ Series: R7x - S7x

MELFA F-Series: R7x - S7x

External links

http://ics-cert.us-cert.gov/advisories/icsa-23-026-05

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.