CVE-2021-20826
CVSS V2 Low 3.3
CVSS V3 High 7.6
Description
Unprotected transport of credentials 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 the communication between the PLC and the software. As a result, the complete access privileges to the PLC Web server may be obtained, and manipulation of the PLC output and/or suspension of the PLC may be conducted.
Overview
- CVE ID
- CVE-2021-20826
- Assigner
- vultures@jpcert.or.jp
- Vulnerability Status
- Analyzed
- Published Version
- 2021-12-24T07:15:06
- Last Modified Date
- 2022-01-11T18:18:37
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.32 | |
| cpe:2.3:h:idec:microsmart_fc6a:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.91 | |
| cpe:2.3:h:idec:microsmart_plus_fc6a:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:* | 1 | OR | 2.12.1 | |
| cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:* | 1 | OR | 1.3.1 | |
| cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:* | 1 | OR | 8.19.1 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:A/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- ADJACENT_NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 3.3
- Severity
- LOW
- Exploitability Score
- 6.5
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
- Attack Vector
- ADJACENT_NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- LOW
- Base Score
- 7.6
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 4.7
References
| Reference URL | Reference Tags |
|---|---|
| https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf | Vendor Advisory |
| https://jvn.jp/en/vu/JVNVU92279973/index.html | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20826 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20826 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:37:49 | Added to TrackCVE | |||
| 2022-12-06 04:48:52 | 2021-12-24T07:15Z | 2021-12-24T07:15:06 | CVE Published Date | updated |
| 2022-12-06 04:48:52 | 2022-01-11T18:18:37 | CVE Modified Date | updated | |
| 2022-12-06 04:48:52 | Analyzed | Vulnerability Status | updated |