-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-19-122-02) GE Communicator
3 May 2019
AusCERT Security Bulletin Summary
Product: GE Communicator
Publisher: National Cybersecurity and Communications Integration Center
Operating System: Windows
Impact/Access: Administrator Compromise -- Existing Account
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
CVE Names: CVE-2019-6566 CVE-2019-6564 CVE-2019-6548
- --------------------------BEGIN INCLUDED TEXT--------------------
Original release date: May 02, 2019
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/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.1
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: General Electric
o Equipment: Communicator
o Vulnerabilities: Uncontrolled Search Path, Use of Hard-coded Credentials,
Improper Access Controls
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
gain administrative privileges, manipulate widgets and UI elements, gain
control over the database, or execute administrative commands.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
GE reports that the following Communicator components, all versions prior to
4.0.517, are affected:
o Communicator Installer
o Communicator Application
o Communicator PostGreSQL
o Communicator MeterManager
o Communicator WISE Uninstaller
3.2 VULNERABILITY OVERVIEW
3.2.1 UNCONTROLLED SEARCH PATH CWE-427
A non-administrative user may place malicious files within the installer file
directory, which may allow an attacker to gain administrative privileges on a
system during installation or upgrade.
CVE-2019-6564 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
3.2.2 UNCONTROLLED SEARCH PATH CWE-427
An attacker may place malicious files within the working directory of the
program, which may allow an attacker to manipulate widgets and UI elements.
CVE-2019-6546 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
3.2.3 USE OF HARD-CODED CREDENTIALS CWE-798
Two backdoor accounts with hardcoded credentials exist, which may allow control
over the database. This service is inaccessible to attackers if Windows default
firewall settings are used by the end user.
CVE-2019-6548 has been assigned to this vulnerability. A CVSS v3 base score of
8.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
3.2.4 IMPROPER ACCESS CONTROLS CWE-284
A service running with system privileges may allow an unprivileged user to
perform certain administrative actions, which may allow the execution of
scheduled scripts with system administrator privileges. This service is
inaccessible to attackers if Windows default firewall settings are used by the
CVE-2019-6544 has been assigned to this vulnerability. A CVSS v3 base score of
5.6 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
3.2.5 IMPROPER ACCESS CONTROLS CWE-284
A non-administrative user may replace the uninstaller with a malicious version,
which could allow an attacker to gain administrator privileges to the system.
CVE-2019-6566 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/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
GE reported these vulnerabilities to NCCIC.
GE recommends users upgrade to GE Communicator version 4.0.517 or newer, which
can be downloaded from the following link:
GE recommends ensuring Windows default firewall rules are active.
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Ensure that least privilege is implemented throughout the system.
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.
NCCIC also recommends that users take the following measures to protect
themselves from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities. Some of
these vulnerabilities are exploitable remotely.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to firstname.lastname@example.org
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----