Operating System:

[Appliance]

Published:

20 September 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3561
                 Advisory (icsa-19-262-01) Tridium Niagara
                             20 September 2019

===========================================================================

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

Product:           Tridium Niagara
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-13528 CVE-2019-8998 

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsa-19-262-01

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ICS Advisory (ICSA-19-262-01)

Tridium Niagara

Original release date: September 19, 2019

Legal Notice

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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 7.8
  o ATTENTION: Low skill level to exploit
  o Vendor: Tridium
  o Equipment: Niagara
  o Vulnerabilities: Information Exposure, Improper Authorization

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow a local user to
escalate their privileges.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Tridium products are affected:

  o Niagara AX 3.8u4 (JACE 3e, JACE 6e, JACE 7, JACE-8000)
  o Niagara 4.4u3 (JACE 3e, JACE 6e, JACE 7, JACE-8000)
  o Niagara 4.7u1 (JACE-8000, Edge 10)

Niagara Windows and Linux Supervisor installations are not impacted.

3.2 VULNERABILITY OVERVIEW

3.2.1 INFORMATION EXPOSURE CWE-200

The QNX procfs service provides access to various process information and
assets, which could allow a less privileged process to gain access to a target
address space.

CVE-2019-8998 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:L/UI:N/S:U/
C:H/I:H/A:H ).

3.2.2 IMPROPER AUTHORIZATION CWE-285

A specific utility may allow an attacker to gain read access to privileged
files.

CVE-2019-13528 has been assigned to this vulnerability. A CVSS v3 base score of
4.4 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:H/UI:N/S:U/
C:H/I:N/A:N ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS : Commercial Facilities, Critical
    Manufacturing, Government Facilities, Information Technology
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Johannes Eger and Fabian Ullrich of the Secure Mobile Networking Lab reported
CVE-2019-8998 to BlackBerry. Francisco Tacliad reported CVE-2019-13528 to CISA.

4. MITIGATIONS

Tridium has released updates that mitigate these vulnerabilities and recommends
users update to the versions identified below:

  o Niagara AX 3.8u4:
       OS Dist: 2.7.402.2
       NRE Config Dist: 3.8.401.1
  o Niagara 4.4u3:
       OS Dist: 4.4.73.38.1 NRE Config
       Dist: 4.4.94.14.1
  o Niagara 4.7u1:
       OS Dist: (JACE 8000) 4.7.109.16.1
       OS Dist (Edge 10): 4.7.109.18.1
       NRE Config Dist: 4.7.110.32.1

Updates are available by contacting the sales support channel or by contacting
the Tridium support team at support@tridium.com

All Tridium Niagara users for all supported platforms are encouraged to update
their systems with these releases to mitigate risk. For further guidance,
please contact a Tridium account manager or Customer Support .

In addition to updating to the latest version, Tridium recommends users with
affected products take the following steps:

  o Review and validate the list of authorized users who can authenticate to
    Niagara.
  o Allow only trained and trusted persons to have physical access to the
    system, including devices with connection to the system though the Ethernet
    port.
  o If remote connections to the network are required, consider using a VPN or
    other means to ensure secure remote connections into the network.

For more information please refer to:

  o Security Bulletin# SB 2019-Tridium-3
  o BlackBerry's Security Advisory QNX-2019-001

CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . 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 webpage on us-cert.gov 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 CISA for tracking
and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. These
vulnerabilities are not exploitable remotely.

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