Vulnerability identifier: #VU64579

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-24946

CWE-ID: CWE-346

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC-Q Q03UDECPU
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-Q 04 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 06 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 10 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 13 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 20 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 26 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 50 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 100 UDEHCPU
Hardware solutions / Firmware
MELSEC iQ-Q 03 UDVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 04 UDVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 06 UDVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 13 UDVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 26 UDVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 04 UDPVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 06 UDPVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 13 UDPVCPU
Hardware solutions / Firmware
MELSEC iQ-Q 26 UDPVCPU
Hardware solutions / Firmware
MELSEC L Series L26CPU-(P)BT
Hardware solutions / Firmware
MELSEC L Series L26CPU(-P)
Hardware solutions / Firmware
MELSEC L Series L02CPU(-P)
Hardware solutions / Firmware
MELSEC L Series L06CPU(-P)
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 improper resource locking. A remote attacker can send a specially crafted packet and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MELSEC-Q Q03UDECPU: All versions

MELSEC iQ-Q 04 UDEHCPU: All versions

MELSEC iQ-Q 06 UDEHCPU: All versions

MELSEC iQ-Q 10 UDEHCPU: All versions

MELSEC iQ-Q 13 UDEHCPU: All versions

MELSEC iQ-Q 20 UDEHCPU: All versions

MELSEC iQ-Q 26 UDEHCPU: All versions

MELSEC iQ-Q 50 UDEHCPU: All versions

MELSEC iQ-Q 100 UDEHCPU: All versions

MELSEC iQ-Q 03 UDVCPU: 24051

MELSEC iQ-Q 04 UDVCPU: 24051

MELSEC iQ-Q 06 UDVCPU: 24051

MELSEC iQ-Q 13 UDVCPU: 24051

MELSEC iQ-Q 26 UDVCPU: 24051

MELSEC iQ-Q 04 UDPVCPU: 24051

MELSEC iQ-Q 06 UDPVCPU: 24051

MELSEC iQ-Q 13 UDPVCPU: 24051

MELSEC iQ-Q 26 UDPVCPU: 24051

MELSEC L Series L26CPU-(P)BT: 24051

MELSEC L Series L26CPU(-P): 24051

MELSEC L Series L02CPU(-P): 24051

MELSEC L Series L06CPU(-P): 24051

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External links
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-007_en.pdf
http://jvn.jp/vu/JVNVU90895626/index.html
http://www.cisa.gov/uscert/ics/advisories/icsa-22-172-01

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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.