#VU85933 Missing Authentication for Critical Function in Mitsubishi Electric products - CVE-2023-6942

Vulnerability identifier: #VU85933

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-6942

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
EZSocket
Other software / Other software solutions
FR Configurator2
Other software / Other software solutions
GT Designer3 Version1(GOT1000)
Other software / Other software solutions
GT Designer3 Version1(GOT2000)
Other software / Other software solutions
MX OPC Server DA
Other software / Other software solutions
GX Works2
Client/Desktop applications / Software for system administration
GX Works3
Client/Desktop applications / Software for system administration
MELSOFT Navigator
Client/Desktop applications / Software for system administration
MT Works2
Client/Desktop applications / Software for system administration
MX Component
Universal components / Libraries / Libraries used by multiple products
MX OPC Server UA
Server applications / SCADA systems

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to missing authentication for critical function. A remote attacker can send specially crafted packets and bypass authentication.

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

Vulnerable software versions

EZSocket: 3.0

FR Configurator2: All versions

GT Designer3 Version1(GOT1000): All versions

GT Designer3 Version1(GOT2000): All versions

GX Works2: 1.11M

GX Works3: All versions

MELSOFT Navigator: 1.04E

MT Works2: All versions

MX Component: 4.00A

MX OPC Server DA: All versions

MX OPC Server UA: All versions

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External links
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-020_en.pdf
https://jvn.jp/vu/JVNVU95103362
https://www.cisa.gov/news-events/ics-advisories/icsa-24-030-02

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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.