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WAGO M&M Software fdtCONTAINER (Update B)

WAGO M&M Software fdtCONTAINER

1. EXECUTIVE SUMMARY

2. UPDATE INFORMATION

This updated advisory is a follow-up to the advisory update titled ICSA-21-021-05 WAGO M&M Software fdtCONTAINER (Update A) that was published February 4, 2021, to the ICS webpage on us-cert.cisa.gov.

3. RISK EVALUATION

If an attacker can socially engineer a valid user into loading a manipulated project file, malicious code can be executed without notice.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following products are affected:

There are reports indicating the following products incorporate the affected component:

——— Begin Update B Part 1 of 2 ———

——— End Update B Part 1 of 2 ———

4.2 VULNERABILITY OVERVIEW

4.2.1    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 could exploit this vulnerability on the workstation by supplying/providing a manipulated project file. If that manipulated project file is loaded, malicious code could be executed without notice. 

VE-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).

4.3 BACKGROUND

4.4 RESEARCHER

Emerson reported this vulnerability to CISA and M&M Software.

5. MITIGATIONS

M&M Software recommends users choose one of the following solutions:

The CERT@VDE advisory for M&M Software also recommends the following mitigation practices:

Emerson has published a notification (EMR.RMT20004.Rev3) for this vulnerability in RTIS. RTIS users should review this notification for additional information specific to RTIS.
CERT@VDE has published an advisory (VDE-2021-001) for this vulnerability in PEPPERL+FUCHS PACTware.
CERT@VDE has published an advisory (VDE-2021-002) for this vulnerability in Weidmüller FDT/DTM Software with WI Manager.

——— Begin Update B Part 2 of 2 ———

Mitsubishi Electric has published advisory 2020-020 concerning the vulnerability in MELSOFT FieldDeviceConfigurator.

——— End Update B Part 2 of 2 ———

CISA recommends users take the following measures to protect themselves from 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. 

Source:

https://us-cert.cisa.gov/ics/advisories/icsa-21-021-05

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