CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
AI Score
Confidence
Low
EPSS
Percentile
53.3%
This updated advisory is a follow-up to the original advisory titled ICSA-21-194-02 Schneider Electric SCADApack RTU, Modicon Controllers, and Software that was published July 13, 2021, on the ICS webpage on us-cert.cisa.gov.
Successful exploitation of these vulnerabilities may allow arbitrary code execution and loss of confidentiality and integrity of the project file.
Schneider Electric reports these vulnerabilities affect the following control products:
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Please note not all the vulnerabilities listed below affect all the products above. See SEVD-2021-194-01 to see how they correlate.
An insufficiently protected credentials vulnerability exists that could cause protected derived function blocks to be read or modified by unauthorized users when accessing a project file.
CVE-2021-22778 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).
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An authentication bypass by spoofing vulnerability exists that could cause unauthorized access in read and write mode to the controller by spoofing the Modbus communication between the engineering software and the controller.
CVE-2021-22779 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
--------- End Update A Part 2 of 2 --------
M&M Software fdtCONTAINER component in versions below 3.5.20304.x and between 3.6 and 3.6.20304.x is vulnerable to deserialization of untrusted data in its project storage.
Note: This vulnerability could cause local code execution on the engineering workstation when a malicious project file is loaded into the engineering software.
CVE-2020-12525 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
An insufficiently protected credentials vulnerability exists that could cause unauthorized access to a project file protected by a password when this file is shared with untrusted sources. An attacker may bypass the password protection and be able to view and modify a project file.
CVE-2021-22780 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
An insufficiently protected credentials vulnerability exists that could cause a leak of SMTP credentials used for mailbox authentication when an attacker can access a project file.
CVE-2021-22781 has been assigned to this vulnerability. A CVSS v3 base score of 6.2 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
A missing encryption of sensitive data vulnerability exists that could cause an information leak allowing disclosure of network and process information, credentials, or intellectual property when an attacker can access a project file.
CVE-2021-22782 has been assigned to this vulnerability. A CVSS v3 base score of 6.2 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Kai Wang (Fortinetβs FortiGuard Labs), Andrey Muravitsky (Kaspersky), Gal Kauffman (Armis), Nicholas Miles (Tenable), Li Wei (Friday Lab - Bolean Tech), Maxim Tumakov (Kaspersky), Kai Wang (Codesafe Team of Legendsec at Qiβanxin Group), and Artem Zinenko (Kaspersky) reported these vulnerabilities to Schneider Electric.
Schneider Electric provides detailed mitigation information for each of the affected products in their own advisory, for more information about these issues, please refer to the original Schneider Electric publication SEVD-2021-194-01.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-01
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12525
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22778
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22779
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22780
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22781
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22782
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
AI Score
Confidence
Low
EPSS
Percentile
53.3%