Vulnerability Description
Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishi | Melsec Iq-R R00 Cpu Firmware | <= 24 |
| Mitsubishi | Melsec Iq-R R00 Cpu | - |
| Mitsubishi | Melsec Iq-R R01 Cpu Firmware | <= 24 |
| Mitsubishi | Melsec Iq-R R01 Cpu | - |
| Mitsubishi | Melsec Iq-R R02 Cpu Firmware | <= 24 |
| Mitsubishi | Melsec Iq-R R02 Cpu | - |
| Mitsubishi | Melsec Iq-R R04 Cpu Firmware | <= 57 |
| Mitsubishi | Melsec Iq-R R04 Cpu | - |
| Mitsubishi | Melsec Iq-R R08 Cpu Firmware | <= 57 |
| Mitsubishi | Melsec Iq-R R08 Cpu | - |
| Mitsubishi | Melsec Iq-R R120 Cpu Firmware | <= 57 |
| Mitsubishi | Melsec Iq-R R120 Cpu | - |
| Mitsubishi | Melsec Iq-R R16 Cpu Firmware | <= 57 |
| Mitsubishi | Melsec Iq-R R16 Cpu | - |
| Mitsubishi | Melsec Iq-R R32 Cpu Firmware | <= 57 |
| Mitsubishi | Melsec Iq-R R32 Cpu | - |
| Mitsubishi | Melsec Iq-R R04 Pcpu Firmware | <= 29 |
| Mitsubishi | Melsec Iq-R R04 Pcpu | - |
| Mitsubishi | Melsec Iq-R R08 Pcpu Firmware | <= 29 |
| Mitsubishi | Melsec Iq-R R08 Pcpu | - |
Related Weaknesses (CWE)
References
- https://jvn.jp/vu/JVNVU94434051/index.htmlThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02Third Party AdvisoryUS Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdfVendor Advisory
- https://jvn.jp/vu/JVNVU94434051/index.htmlThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02Third Party AdvisoryUS Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdfVendor Advisory
FAQ
What is CVE-2021-20609?
CVE-2021-20609 is a vulnerability with a CVSS score of 7.5 (HIGH). Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R S...
How severe is CVE-2021-20609?
CVE-2021-20609 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20609?
Check the references section above for vendor advisories and patch information. Affected products include: Mitsubishi Melsec Iq-R R00 Cpu Firmware, Mitsubishi Melsec Iq-R R00 Cpu, Mitsubishi Melsec Iq-R R01 Cpu Firmware, Mitsubishi Melsec Iq-R R01 Cpu, Mitsubishi Melsec Iq-R R02 Cpu Firmware.