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AUSCERT External Security Bulletin Redistribution
ESB-2022.1706
Advisory (icsa-22-109-03) FANUC ROBOGUIDE Simulation Platform
20 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: FANUC ROBOGUIDE Simulation Platform
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2021-43990 CVE-2021-43988 CVE-2021-43986
CVE-2021-43933 CVE-2021-38483
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-109-03
Comment: CVSS (Max): 6.1 CVE-2021-43988 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H
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ICS Advisory (ICSA-22-109-03)
FANUC ROBOGUIDE Simulation Platform
Original release date: April 19, 2022
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 6.1
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: FANUC Corporation / FANUC America Corporation
o Equipment: ROBOGUIDE
o Vulnerabilities: Incorrect Permission Assignment for Critical Resource,
Improper Access Control, Path Traversal, Improper Restriction of XML
External Entity Reference, Uncontrolled Resource Consumption
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could cause a
denial-of-service condition, allow for remote code execution, or provide
unauthorized privilege escalation.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of ROBOGUIDE, a simulation platform software suite for
FANUC Robots, are affected:
o ROBOGUIDE v9.40083.00.05 (Rev T) and earlier
Note: This offline simulation software program does not provide any control or
management of physical devices or processes. It is included because it is used
in Industrial Control Systems (ICS).
3.2 VULNERABILITY OVERVIEW
3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732
The affected product is vulnerable to misconfigured binaries, allowing users on
the target PC with SYSTEM level privileges access to overwrite the binary and
modify files to gain privilege escalation.
CVE-2021-38483 has been assigned to this vulnerability. A CVSS v3 base score of
6.0 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:L/UI:R/S:U/
C:N/I:H/A:H ).
3.2.2 IMPROPER ACCESS CONTROL CWE-284
The setup program for the affected product configures its files and folders
with full access, which may allow unauthorized users permission to replace
original binaries and achieve privilege escalation.
CVE-2021-43986 has been assigned to this vulnerability. A CVSS v3 base score of
6.0 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:L/UI:R/S:U/
C:N/I:H/A:H ).
3.2.3 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH
TRAVERSAL') CWE 22
The affected product is vulnerable to a network-based attack by threat actors
utilizing crafted naming conventions of files to gain unauthorized access
rights.
CVE-2021-43988 has been assigned to this vulnerability. A CVSS v3 base score of
6.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/
C:N/I:N/A:H ).
3.2.4 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611
The affected product is vulnerable to a network-based attack by threat actors
supplying a crafted, malicious XML payload designed to trigger an external
entity reference call.
CVE-2021-43990 has been assigned to this vulnerability. A CVSS v3 base score of
6.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/
C:N/I:N/A:H ).
3.2.5 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
The affected product is vulnerable to a network-based attack by threat actors
sending unimpeded requests to the receiving server, which could cause a
denial-of-service condition due to lack of heap memory resources.
CVE-2021-43933 has been assigned to this vulnerability. A CVSS v3 base score of
6.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/
C:N/I:N/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan, United States
3.4 RESEARCHER
Sharon Brizinov with Claroty reported these vulnerabilities to CISA.
4. MITIGATIONS
FANUC has created a new version to address these vulnerabilities. Users may
obtain and install the new version by downloading ROBOGUIDE v9 Rev U or higher
from the FANUC or FANUC America website (login required).
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure 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 VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its 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 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 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 these vulnerabilities.
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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