9.8
CRITICAL
CVE-2021-37401
Siemens Simatic S7 Vulnerability - Unauthorized Access
Description

An attacker may obtain the user credentials from file servers, backup repositories, or ZLD files saved in SD cards. As a result, the PLC user program may be uploaded, altered, and/or downloaded.

INFO

Published Date :

Dec. 28, 2021, 1:15 p.m.

Last Modified :

Jan. 7, 2022, 8:29 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-37401 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Idec microsmart_fc6a_firmware
2 Idec microsmart_plus_fc6a_firmware
3 Idec data_file_manager
4 Idec windedit
5 Idec windldr
6 Idec microsmart_plus_fc6b_firmware
7 Idec microsmart_fc6b_firmware
8 Idec ft1a_smartaxix_pro_firmware
9 Idec ft1a_smartaxix_lite_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-37401.

URL Resource
https://jvn.jp/en/vu/JVNVU92279973/ Third Party Advisory
https://us.idec.com/idec-us/en/USD/Programmable-Logic-Controller/Micro-PLC/FC6A-MicroSmart/c/MicroSmart_FC6A Vendor Advisory
https://us.idec.com/idec-us/en/USD/Software-Downloads-Automation-Organizer Vendor Advisory
https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-37401 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-37401 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jan. 07, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://jvn.jp/en/vu/JVNVU92279973/ No Types Assigned https://jvn.jp/en/vu/JVNVU92279973/ Third Party Advisory
    Changed Reference Type https://us.idec.com/idec-us/en/USD/Programmable-Logic-Controller/Micro-PLC/FC6A-MicroSmart/c/MicroSmart_FC6A No Types Assigned https://us.idec.com/idec-us/en/USD/Programmable-Logic-Controller/Micro-PLC/FC6A-MicroSmart/c/MicroSmart_FC6A Vendor Advisory
    Changed Reference Type https://us.idec.com/idec-us/en/USD/Software-Downloads-Automation-Organizer No Types Assigned https://us.idec.com/idec-us/en/USD/Software-Downloads-Automation-Organizer Vendor Advisory
    Changed Reference Type https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf No Types Assigned https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf Vendor Advisory
    Added CWE NIST CWE-522
    Added CPE Configuration OR *cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:* versions up to (including) 2.12.1 *cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:* versions up to (including) 1.3.1 *cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:* versions up to (including) 8.19.1
    Added CPE Configuration AND OR *cpe:2.3:o:idec:microsmart_plus_fc6b_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.31 OR cpe:2.3:h:idec:microsmart_plus_fc6b:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.91 OR cpe:2.3:h:idec:microsmart_plus_fc6a:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:idec:microsmart_fc6b_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.31 OR cpe:2.3:h:idec:microsmart_fc6b:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.32 OR cpe:2.3:h:idec:microsmart_fc6a:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:idec:ft1a_smartaxix_pro_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.31 OR cpe:2.3:h:idec:ft1a_smartaxix_pro:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:idec:ft1a_smartaxix_lite_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.31 OR cpe:2.3:h:idec:ft1a_smartaxix_lite:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-37401 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.51 }} 0.05%

score

0.76967

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability