SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-117001247] Schneider Electric Modicon M221 PLCs and SoMachine Basic

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2017-04-13OtherSchneider ElectricSimon Heming, Maik Bruggemann, Hendrik Schwartke, and Ralf Spenneberg of Open Source Security discovered these vulnerabilities.N/ACVE-2017-7574 CVE-2017-7575 N/AN/AN/A

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# Schneider Electric Modicon M221 PLCs and SoMachine Basic
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### VULNERABLE VENDOR
Schneider Electric


### VULNERABLE PRODUCT
Modicon M221 PLCs and SoMachine Basic



### RESEARCHER
Simon Heming, Maik Brüggemann, Hendrik Schwartke, and Ralf Spenneberg of Open Source Security discovered these vulnerabilities.



### AFFECTED PRODUCTS

Schneider Electric reports that these vulnerabilities affect the following PLCs and tools for configuring and developing automation machinery:

Modicon M221 PLC, firmware versions up to v1.5.0.1, and
SoMachine Basic, software versions up to v1.5



### IMPACT

One vulnerability may allow an attacker to extract a protected project file from the controller to obtain sensitive project information. The second vulnerability may allow a user with access to a protected project file to decrypt it in order to obtain sensitive information without authorization.



### VULNERABILITY OVERVIEW

USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
Project files, including user-defined project passwords, are encrypted with a hardcoded password.
CVE-2017-7574 has been assigned to this vulnerability.
A CVSS v3 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L)


PROTECTION MECHANISM FAILURE CWE-693
An attacker can send a specifically crafted command via Modbus over TCP port 502 to the logic controller to discover an application protection password.
CVE-2017-7575 has been assigned to this vulnerability.
A CVSS v3 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L)





### BACKGROUND

Critical Infrastructure Sector: Commercial Facilities
Countries/Areas Deployed: Worldwide
Company Headquarters Location: France




### MITIGATION

Schneider Electric recommends that users store project files in secure, access-restricted locations and encrypt project files with reputable third party file encryption tools. A fix to enhance the SoMachine Basic encryption mechanism will be released on June 15, 2017.

Schneider Electric's security notice SEVD-2017-097-01 is available at the following location:

http://www.schneider-electric.com/en/download/document/SEVD-2017-097-01/


Schneider Electric recommends that users implement the following mitigations until an enhanced encryption mechanism is released on June 15, 2017:

Activate Application Protection with a blank password within Modicon M221 applications, as described in section "Password Protecting an Application" of SoMachine Basic online help. This will disable the application upload features of the M221.

Protect access to controllers using a firewall and blocking all remote/external access to Port 502/TCP.

Schneider Electric's security notice SEVD-2017-097-02 is available at the following location:

http://www.schneider-electric.com/en/download/document/SEVD-2017-097-02/