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

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CVE-2021-20827

Severity CVSS v4.0:
Pending analysis
Type:
CWE-312 Cleartext Storage of Sensitive Information
Publication date:
24/12/2021
Last modified:
11/01/2022

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.

Impact

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

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

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

Base Score 2.0
5.00
Severity 2.0
MEDIUM

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