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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-20-098-05) KUKA.Sim Pro
8 April 2020
AusCERT Security Bulletin Summary
Product: KUKA.Sim Pro
Operating System: Windows
Impact/Access: Reduced Security -- Remote with User Interaction
CVE Names: CVE-2020-10635
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ICS Advisory (ICSA-20-098-05)
Original release date: April 07, 2020
All information products included in https://us-cert.gov/ics are provided"as
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does not provide any warranties of any kind regarding any information contained
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1. EXECUTIVE SUMMARY
o CVSS v3 4.3
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: KUKA
o Equipment: Sim Pro
o Vulnerability: Improper Enforcement of Message Integrity During
Transmission in a Communication Channel
2. RISK EVALUATION
Successful exploitation of this vulnerability could result in a loss of
integrity in external 3D models fetched from remote servers. When tested on
real machines, this effect is unpredictable.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
KUKA.Sim Pro Version 3.1 simulation and machine-programming software is
affected by this vulnerability.
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER ENFORCEMENT OF MESSAGE INTEGRITY DURING TRANSMISSION IN A
COMMUNICATION CHANNEL (CWE-924)
Simulation models for these devices are hosted by a server maintained by KUKA.
When these devices request a model, the server transmits the model in
CVE-2020-10635 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
Federico Maggi of Trend Micro reported this vulnerability to CISA.
KUKA recommends upgrading KUKA.Sim Pro to Version 3.1.2 or above to mitigate
this vulnerability. The update is provided for users with a licensed Version
3.1. Version 3.1 is the only affected version that is still maintained. All
previous versions of KUKA.Sim Pro have been discontinued; Version 3.0 has been
discontinued since the beginning of 2019.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
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.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.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
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.
For any questions related to this report, please contact the CISA at:
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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