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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-18-163-01) Schneider Electric U.motion Builder
13 June 2018
AusCERT Security Bulletin Summary
Product: Schneider Electric U.motion Builder
Operating System: Virtualisation
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2018-7787 CVE-2018-7786 CVE-2018-7785
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Schneider Electric U.motion Builder
Original release date: June 12, 2018
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1. EXECUTIVE SUMMARY
o CVSS v3 10.0
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Schneider Electric
o Equipment: U.motion Builder
o Vulnerabilities: Command Injection, Cross-site Scripting, and Improper
3. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow remote code
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following U.motion Builder Software versions are affected:
o U.motion Builder versions prior to 1.3.4
4.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
An input string may be evaluated as a command by the application. An attacker
could exploit this to execute code, read the stack, or cause a segmentation
fault in the running application.
CVE-2018-7784 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is
3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (OS
COMMAND INJECTION) CWE-78
A remote command injection allows authentication bypass.
CVE-2018-7785 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is
3.2.3 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION
(CROSS-SITE SCRIPTING) CWE-79
A cross-site scripting (XSS) vulnerability exists, which could allow injection
of malicious scripts.
CVE-2018-7786 has been assigned to this vulnerability. A CVSS v3 base score of
6.1 has been calculated; the CVSS vector string is
3.2.4 IMPROPER INPUT VALIDATION CWE-20
This vulnerability is due to improper validation of input of context parameter
in HTTP GET request, which could allow the disclosure of sensitive information.
CVE-2018-7787 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is
o Critical Infrastructure Sectors: Commercial Facilities, Critical
Manufacturing, and Energy
o Countries/Areas Deployed: United States, Europe, and Asia
o Company Headquarters Location: Paris, France
Wei Gao of Ixia and bigric3@360A-TEAM reported these vulnerabilities to NCCIC.
Schneider Electric has released firmware update Version 1.3.4, which includes
fixes for these vulnerabilities. It is highly recommended that U.motion Builder
users apply the patch in a timely manner.
The firmware is available for download at:
Schneider Electric's security notice SEVD-2018-151-01 is available at the
NCCIC 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC 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 NCCIC at:
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
The NCCIC 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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