CVE-2021-20827
Last modified
CVE-2021-20827 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Plaintext storage of a password vulnerability in IDEC PLCs (FC6A Series MICROSmart All-in-One CPU module v2.32 and earlier, FC6A Series MICROSmart Plus CPU module v1.91 and earlier, WindLDR v8.19.1 and earlier, WindEDIT Lite v1.3.1 and earlier, and Data File Manager v2.12.1 and earlier) allows an attacker to obtain the PLC Web server user credentials from file servers, backup repositories, or ZLD files saved in SD cards. As a result, the attacker may access the PLC Web server and hijack the PLC, and manipulation of the PLC output and/or suspension of the PLC may be conducted.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.
Description
Plaintext storage of a password vulnerability in IDEC PLCs (FC6A Series MICROSmart All-in-One CPU module v2.32 and earlier, FC6A Series MICROSmart Plus CPU module v1.91 and earlier, WindLDR v8.19.1 and earlier, WindEDIT Lite v1.3.1 and earlier, and Data File Manager v2.12.1 and earlier) allows an attacker to obtain the PLC Web server user credentials from file servers, backup repositories, or ZLD files saved in SD cards. As a result, the attacker may access the PLC Web server and hijack the PLC, and manipulation of the PLC output and/or suspension of the PLC may be conducted.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Idec | Microsmart Fc6a Firmware | <= 2.32 |
| Idec | Microsmart Plus Fc6a Firmware | <= 1.91 |
| Idec | Data File Manager | <= 2.12.1 |
| Idec | Windedit | <= 1.3.1 |
| Idec | Windldr | <= 8.19.1 |
References
- https://jvn.jp/en/vu/JVNVU92279973/index.htmlThird Party Advisory
- https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdfVendor Advisory
- https://jvn.jp/en/vu/JVNVU92279973/index.htmlThird Party Advisory
- https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdfVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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