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AUSCERT External Security Bulletin Redistribution
ESB-2017.1753
Advisory (ICSA-17-194-02) GE Communicator
14 July 2017
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AusCERT Security Bulletin Summary
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Product: GE Communicator
Publisher: US-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-7908
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-194-02
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Advisory (ICSA-17-194-02)
GE Communicator
Original release date: July 13, 2017
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/.
CVSS v3 7.6
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: GE
Equipment: Communicator
Vulnerability: Heap-Based Buffer Overflow
AFFECTED PRODUCTS
The following versions of Communicator, an application for programming and
monitoring supported metering devices, are affected:
Communicator 3.15 and prior.
IMPACT
Exploitation could allow attackers to execute arbitrary code or create a
denial-of-service condition.
MITIGATION
GE recommends users update to the latest release, Version 4.0, to mitigate
this vulnerability. It can be obtained from this location:
https://www.gegridsolutions.com/app/ViewFiles.aspx?prod=epm6000&type=7 (link
is external)
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of this vulnerability. Specifically, users should:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 in the ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
In addition, ICS-CERT recommends that users take the following measures to
protect themselves from social engineering attacks:
Do not click web links or open unsolicited attachments in email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding
email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information
on social engineering attacks.
No known public exploits specifically target this vulnerability.
VULNERABILITY OVERVIEW
HEAP-BASED BUFFER OVERFLOW CWE-122
A malicious HTML file that loads the ActiveX controls trigger the
vulnerabilities via unchecked function calls.
CVE-2017-7908 has been assigned to this vulnerability. A CVSS v3 base score of
7.6 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H).
RESEARCHER
Kimiya, working with iDefense Labs (now part of Accenture Security),
identified the vulnerability.
BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing and Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Boston, Massachusetts
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov
ICS-CERT 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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