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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1529
                 Advisory (ICSA-19-122-02) GE Communicator
                                3 May 2019

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        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
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6566 CVE-2019-6564 CVE-2019-6548
                   CVE-2019-6546 CVE-2019-6544 

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-19-122-02

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Advisory (ICSA-19-122-02)

GE Communicator

Original release date: May 02, 2019

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/ .

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/
C:H/I:H/A:H ).

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/
C:H/I:H/A:H ).

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/
C:H/I:H/A:H ).

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
end user.

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/
C:L/I:L/A:L ).

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/
C:H/I:H/A:H ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

GE reported these vulnerabilities to NCCIC.

4. MITIGATIONS

GE recommends users upgrade to GE Communicator version 4.0.517 or newer, which
can be downloaded from the following link:

https://www.gegridsolutions.com/app/ViewFiles.aspxprod=EPM9700&type=7

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
Strategies .

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.

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