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AUSCERT External Security Bulletin Redistribution
ESB-2021.0262
Advisory (icsa-21-021-05) WAGO M&M Software fdtCONTAINER
22 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: WAGO M&M Software fdtCONTAINER
Publisher: ICS-CERT
Operating System: Windows
Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12525
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-021-05
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ICS Advisory (ICSA-21-021-05)
WAGO M&M Software fdtCONTAINER
Original release date: January 21, 2021
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.3
o ATTENTION: Low skill level to exploit
o Vendor: M&M Software GmbH, a subsidiary of WAGO Kontakttechnik
o Equipment: fdtCONTAINER
o Vulnerability: Deserialization of Untrusted Data
2. RISK EVALUATION
If an attacker can socially engineer a valid user into loading a manipulated
project file, malicious code can be executed without notice.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following products are affected:
o fdtCONTAINER component
Versions between 3.5.0 and 3.5.20304.x
Versions between 3.6.0 and 3.6.20304.x
Versions older than 3.5
o fdtCONTAINER application
Versions between 4.5.0 and 4.5.20304.x
Versions between 4.6.0 and 4.6.20304.x
Versions older than 4.5
o dtmINSPECTOR Version 3 (Based on FDT 1.2.x)
There are reports indicating the following products incorporate the affected
component:
o Emerson Rosemount Transmitter Interface Software (RTIS) SKUs:
04088-9000-0001, 4088-9000-0002, and 7000003-312
o PEPPERL+FUCHS PACTware 5.0, up to and including Version 5.0.5.31
3.2 VULNERABILITY OVERVIEW
3.2.1 DESERIALIZATION OF UNTRUSTED DATA CWE-502
A vulnerability has been discovered in the fdtCONTAINER component issued by M&M
Software and used by other products, including RTIS and PACTware. An attacker
might be able to exploit this vulnerability on the workstation running RTIS by
supplying/providing a manipulated project file. If that project file is loaded,
malicious code can be executed without notice.
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 ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing, Energy, Transportation Systems
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Emerson reported this vulnerability to CISA and M&M Software.
4. MITIGATIONS
M&M Software recommends users choose one of the following solutions:
o Update the fdtCONTAINER component/fdtCONTAINER application to a version
that provides a more secure deserialization of the project data. This
version will still use a deprecated serialization technology but will fix
the currently known attack vector and will be compatible with existing,
non-manipulated project files.
o Update the fdtCONTAINER component/fdtCONTAINER application to a version
(fdtCONTAINER component: 3.7 or newer, fdtCONTAINER application: 4.7 or
newer) that provides a secure deserialization of the project data with an
updated serialization technology. This will break the compatibility to
existing, non-manipulated project files.
The CERT@VDE advisory for M&M Software also recommends the following mitigation
practices:
o Exchange project data only via secure exchange services.
o Use appropriate means to protect the project storage from unauthorized
manipulation.
o Do not open project data from an unknown source.
o Reduce the user rights of the host application to the necessary minimum.
Emerson recommends users ensure all workstations containing any software used
to interact with field instruments be protected using industry cybersecurity
best practices. Furthermore, Emerson has made the decision to discontinue RTIS
so no additional software updates will be provided. Therefore, Emerson
recommends users transition to the free AMS Instrument Inspector software as a
replacement device configuration tool.
For additional information, please contact Emerson Global Customer Care (24/7
Support) Phone: +1-888-889- 9170 or email: ContactUs@Emerson.com
CERT@VDE has published an advisory ( VDE-2021-001 ) for this vulnerability in
PEPPERL+FUCHS PACTware.
CISA recommends users take the following measures to protect themselves from
social engineering attacks:
o Ensure the least-privilege user principle is followed.
o Do not open project files from untrusted sources.
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
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-12-146-01B--Targeted 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 this vulnerability. This
vulnerability is not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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