Vulnerability identifier: #VU69826

Vulnerability risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-40265

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC iQ-R 04 (EN) CPU
Hardware solutions / Firmware
MELSEC iQ-R 08 (EN) CPU
Hardware solutions / Firmware
MELSEC iQ-R 16 (EN) CPU
Hardware solutions / Firmware
MELSEC iQ-R 32 (EN) CPU
Hardware solutions / Firmware
MELSEC iQ-R 120 (EN) CPU
Hardware solutions / Firmware
MELSEC iQ-R RJ71EN71
Hardware solutions / Firmware

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MELSEC iQ-R 04 (EN) CPU: 65

MELSEC iQ-R 08 (EN) CPU: 65

MELSEC iQ-R 16 (EN) CPU: 65

MELSEC iQ-R 32 (EN) CPU: 65

MELSEC iQ-R 120 (EN) CPU: 65

MELSEC iQ-R RJ71EN71: 65

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External links
http://jvn.jp/vu/JVNVU94702422
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdf

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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.