Vulnerability Description
Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishielectric | Fx3U-Enet Firmware | <= 1.14 |
| Mitsubishielectric | Fx3U-Enet | - |
| Mitsubishielectric | Fx3U-Enet-L Firmware | <= 1.14 |
| Mitsubishielectric | Fx3U-Enet-L | - |
| Mitsubishielectric | Fx3U-Enet-P502 Firmware | <= 1.14 |
| Mitsubishielectric | Fx3U-Enet-P502 | - |
References
- https://jvn.jp/vu/JVNVU93268332/index.htmlThird Party AdvisoryVDB Entry
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-01Third Party AdvisoryUS Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-023_en.pdfVendor Advisory
- https://jvn.jp/vu/JVNVU93268332/index.htmlThird Party AdvisoryVDB Entry
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-01Third Party AdvisoryUS Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-023_en.pdfVendor Advisory
FAQ
What is CVE-2021-20612?
CVE-2021-20612 is a vulnerability with a CVSS score of 7.5 (HIGH). Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version ...
How severe is CVE-2021-20612?
CVE-2021-20612 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-2021-20612?
Check the references section above for vendor advisories and patch information. Affected products include: Mitsubishielectric Fx3U-Enet Firmware, Mitsubishielectric Fx3U-Enet, Mitsubishielectric Fx3U-Enet-L Firmware, Mitsubishielectric Fx3U-Enet-L, Mitsubishielectric Fx3U-Enet-P502 Firmware.