CVE-2021-20612
First published: Fri Jan 14 2022(Updated: )
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.
Credit: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 | ||
| Mitsubishi Electric FX3U-ENET Firmware Version 1.14 and prior | ||
| Mitsubishi Electric FX3U-ENET-L Firmware Version 1.14 and prior | ||
| Mitsubishi Electric FX3U-ENET-P502 Firmware Version 1.14 and prior |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-20612?
The severity of CVE-2021-20612 is high with a CVSS score of 7.5.
How does CVE-2021-20612 affect the MELSEC-F series FX3U-ENET?
CVE-2021-20612 affects the MELSEC-F series FX3U-ENET with Firmware version 1.14 and prior, causing a denial-of-service (DoS) condition.
Is the MELSEC-F series FX3U-ENET-L vulnerable to CVE-2021-20612?
No, the MELSEC-F series FX3U-ENET-L is not vulnerable to CVE-2021-20612.
How can I fix CVE-2021-20612 in the affected MELSEC-F series devices?
To fix CVE-2021-20612 in the MELSEC-F series devices, update the firmware to version 1.15 or later as recommended by Mitsubishi Electric.
Where can I find more information about CVE-2021-20612?
You can find more information about CVE-2021-20612 in the following references: [link1](https://jvn.jp/vu/JVNVU93268332/index.html), [link2](https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-01), [link3](https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-023_en.pdf).
- collector/nvd-api
- collector/nvd-index
- agent/type
- agent/author
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/references
- agent/weakness
- agent/description
- agent/first-publish-date
- collector/ics-cert-advisory
- source/ICS
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/tags
- agent/event
- agent/trending
- vendor/mitsubishielectric
- canonical/mitsubishielectric fx3u-enet firmware
- version/mitsubishielectric fx3u-enet firmware/1.14
- canonical/mitsubishielectric fx3u-enet
- canonical/mitsubishielectric fx3u-enet-l firmware
- version/mitsubishielectric fx3u-enet-l firmware/1.14
- canonical/mitsubishielectric fx3u-enet-l
- canonical/mitsubishielectric fx3u-enet-p502 firmware
- version/mitsubishielectric fx3u-enet-p502 firmware/1.14
- canonical/mitsubishielectric fx3u-enet-p502
- vendor/mitsubishi electric
- canonical/mitsubishi electric fx3u-enet firmware version 1.14 and prior
- canonical/mitsubishi electric fx3u-enet-l firmware version 1.14 and prior
- canonical/mitsubishi electric fx3u-enet-p502 firmware version 1.14 and prior