Denial of service in Mitsubishi Electric MELSEC iQ-R, Q and L Series



Published: 2020-11-02
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-5652
CWE-ID CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
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MELSEC iQ-R 00 CPU
Hardware solutions / Firmware

MELSEC iQ-R 01 CPU
Hardware solutions / Firmware

MELSEC iQ-R 02 CPU
Hardware solutions / Firmware

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 08 SFCPU
Hardware solutions / Firmware

MELSEC iQ-R 16 SFCPU
Hardware solutions / Firmware

MELSEC iQ-R 32 SFCPU
Hardware solutions / Firmware

MELSEC iQ-R 120 SFCPU
Hardware solutions / Firmware

MELSEC iQ-R 08 PCPU
Hardware solutions / Firmware

MELSEC iQ-R 16 PCPU
Hardware solutions / Firmware

MELSEC iQ-R 32 PCPU
Hardware solutions / Firmware

MELSEC iQ-R 120 PCPU
Hardware solutions / Firmware

MELSEC iQ-R 08 PSFCPU
Hardware solutions / Firmware

MELSEC iQ-R 16 PSFCPU
Hardware solutions / Firmware

MELSEC iQ-R 32 PSFCPU
Hardware solutions / Firmware

MELSEC iQ-R 120 PSFCPU
Hardware solutions / Firmware

MELSEC iQ-R 16 MTCPU
Hardware solutions / Firmware

MELSEC iQ-R 32 MTCPU
Hardware solutions / Firmware

MELSEC iQ-R 64 MTCPU
Hardware solutions / Firmware

MELSEC iQ-Q 03 UDECPU
Hardware solutions / Firmware

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 iQ-Q 172 DCPU-S1
Hardware solutions / Firmware

MELSEC iQ-Q 173 DCPU-S1
Hardware solutions / Firmware

MELSEC iQ-Q 172 DSCPU
Hardware solutions / Firmware

MELSEC iQ-Q 173 DSCPU
Hardware solutions / Firmware

MELSEC iQ-Q 170 MCPU
Hardware solutions / Firmware

MELSEC iQ-Q 170 MSCPU(-S1)
Hardware solutions / Firmware

MELSEC iQ-Q MR-MQ100
Hardware solutions / Firmware

MELSEC-L L02CPU-P
Hardware solutions / Routers & switches, VoIP, GSM, etc

MELSEC-L L06CPU-P
Hardware solutions / Routers & switches, VoIP, GSM, etc

MELSEC-L L26CPU-P
Hardware solutions / Routers & switches, VoIP, GSM, etc

MELSEC-L L26CPU-PBT
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Mitsubishi Electric

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU48069

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-2020-5652

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a specially crafted packet, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MELSEC iQ-R 00 CPU: 20

MELSEC iQ-R 01 CPU: 20

MELSEC iQ-R 02 CPU: 20

MELSEC iQ-R 04 (EN) CPU: 52

MELSEC iQ-R 08 (EN) CPU: 52

MELSEC iQ-R 16 (EN) CPU: 52

MELSEC iQ-R 32 (EN) CPU: 52

MELSEC iQ-R 120 (EN) CPU: 52

MELSEC iQ-R 08 SFCPU: 22

MELSEC iQ-R 16 SFCPU: 22

MELSEC iQ-R 32 SFCPU: 22

MELSEC iQ-R 120 SFCPU: 22

MELSEC iQ-R 08 PCPU: All versions

MELSEC iQ-R 16 PCPU: All versions

MELSEC iQ-R 32 PCPU: All versions

MELSEC iQ-R 120 PCPU: All versions

MELSEC iQ-R 08 PSFCPU: All versions

MELSEC iQ-R 16 PSFCPU: All versions

MELSEC iQ-R 32 PSFCPU: All versions

MELSEC iQ-R 120 PSFCPU: All versions

MELSEC iQ-R 16 MTCPU: All versions

MELSEC iQ-R 32 MTCPU: All versions

MELSEC iQ-R 64 MTCPU: All versions

MELSEC iQ-Q 03 UDECPU: 22081

MELSEC iQ-Q 04 UDEHCPU: 22081

MELSEC iQ-Q 06 UDEHCPU: 22081

MELSEC iQ-Q 10 UDEHCPU: 22081

MELSEC iQ-Q 13 UDEHCPU: 22081

MELSEC iQ-Q 20 UDEHCPU: 22081

MELSEC iQ-Q 26 UDEHCPU: 22081

MELSEC iQ-Q 50 UDEHCPU: 22081

MELSEC iQ-Q 100 UDEHCPU: 22081

MELSEC iQ-Q 03 UDVCPU: 22031

MELSEC iQ-Q 04 UDVCPU: 22031

MELSEC iQ-Q 06 UDVCPU: 22031

MELSEC iQ-Q 13 UDVCPU: 22031

MELSEC iQ-Q 26 UDVCPU: 22031

MELSEC iQ-Q 04 UDPVCPU: 22031

MELSEC iQ-Q 06 UDPVCPU: 22031

MELSEC iQ-Q 13 UDPVCPU: 22031

MELSEC iQ-Q 26 UDPVCPU: 22031

MELSEC iQ-Q 172 DCPU-S1: All versions

MELSEC iQ-Q 173 DCPU-S1: All versions

MELSEC iQ-Q 172 DSCPU: All versions

MELSEC iQ-Q 173 DSCPU: All versions

MELSEC iQ-Q 170 MCPU: All versions

MELSEC iQ-Q 170 MSCPU(-S1): All versions

MELSEC iQ-Q MR-MQ100: All versions

MELSEC-L L02CPU-P: All versions

MELSEC-L L06CPU-P: All versions

MELSEC-L L26CPU-P: All versions

MELSEC-L L26CPU-PBT: All versions

External links

http://ics-cert.us-cert.gov/advisories/icsa-20-303-01
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_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.

Is there known malware, which exploits this vulnerability?

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



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