ESB-2018.2932 - [Win] Emerson AMS Device Manager: Execute arbitrary code/commands - Remote/unauthenticated 2018-10-01

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2932
           Advisory (ICSA-18-270-01) Emerson AMS Device Manager
                              1 October 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Emerson AMS Device Manager
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-14808 CVE-2018-14804 

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-270-01

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Advisory (ICSA-18-270-01)

Emerson AMS Device Manager

Original release date: September 27, 2018

Legal Notice

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For more information about TLP, see http://www.us-cert.gov/tlp/.

1. EXECUTIVE SUMMARY

  o CVSS v3 10.0
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: Emerson
  o Equipment: AMS Device Manager
  o Vulnerabilities: Improper Access Control, Improper Privilege Management

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow arbitrary remote
code execution and malware injection.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of AMS Device Manager, an Asset Management System, are
affected:

  o AMS Device Manager: v12.0 to v13.5

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER ACCESS CONTROL CWE-284

A specially crafted script may be run that allows arbitrary remote code
execution.

CVE-2018-14804 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H).

3.2.2    IMPROPER PRIVILEGE MANAGEMENT CWE-269

Non-administrative users are able to change executable and library files on the
affected products.

CVE-2018-14808 has been assigned to this vulnerability. A CVSS v3 base score of
8.2 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:C/C:H
/I:H/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

Sergey Temnikov of Kaspersky Lab and Emerson discovered and reported these
vulnerabilities to NCCIC.

4. MITIGATIONS

Emerson recommends users patch the affected products listed below:

AMS Device Manager: v12.0 to v13.5  Software patches are available to users
with access to the Guardian Support Portal at:

https://guardian.emersonprocess.com/.

Please refer to the Knowledge Base Articles for AMS NK-1700-0324, NK-1700-0252
and DeltaV NK-1800-0880 (DSN 18006) for more information.

Vulnerability CVE-2018-14808 cannot be exploited if application whitelisting is
implemented since it would prevent files from being overwritten.

To limit exposure to these and other vulnerabilities, Emerson recommends
deploying and configuring AMS Device Manager as described in the AMS Device
Manager Installation Guide which is available in Emerson's Guardian Support
Portal.

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
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.

No known public exploits specifically target these vulnerabilities.

Contact Information

For any questions related to this report, please contact the NCCIC at:

Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  http://
ics-cert.us-cert.gov 
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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