Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-20826

Severity CVSS v4.0:
Pending analysis
Type:
CWE-522 Insufficiently Protected Credentials
Publication date:
24/12/2021
Last modified:
11/01/2022

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.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 7.60 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): Low
Availability (A): Low

Base Score 3.x
7.60
Severity 3.x
HIGH
Vector 2.0
AV:A/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 3.30 LOW
Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
3.30
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:* 2.32 (including)
cpe:2.3:h:idec:microsmart_fc6a:-:*:*:*:*:*:*:*
cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:* 1.91 (including)
cpe:2.3:h:idec:microsmart_plus_fc6a:-:*:*:*:*:*:*:*
cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:* 2.12.1 (including)
cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:* 1.3.1 (including)
cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:* 8.19.1 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools