ESB-2018.0287 - [Appliance] Nari PCS-9611: Access confidential data - Remote/unauthenticated 2018-01-30

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0287
                  Advisory (ICSA-18-025-01) Nari PCS-9611
                              30 January 2018

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

Product:           Nari PCS-9611
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Modify Arbitrary Files   -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2018-5447  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-025-01

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Advisory (ICSA-18-025-01)

Nari PCS-9611

Original release date: January 25, 2018 | Last revised: January 26, 2018

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 9.8

ATTENTION: Remotely exploitable/low skill level to exploit. Public exploits
are available.

Vendor: Nari

Equipment: PCS-9611

Vulnerability: Improper Input Validation

AFFECTED PRODUCTS

All versions of the PCS-9611 relay, a control and monitoring unit,
are affected.

IMPACT

Successful exploitation of this vulnerability could allow a remote attacker
arbitrary read/write abilities on the system.

MITIGATION

NCCIC has reached out to Nari but has not received a response.

NCCIC recommends 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.

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 in the NCCIC 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 NCCIC
for tracking and correlation against other incidents.

VULNERABILITY OVERVIEW

IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability has been identified that affects
a service within the software that may allow a remote attacker to arbitrarily
read/access system resources and affect the availability of the system.

CVE-2018-5447 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

RESEARCHER

Kirill Nesterov and Alexey Osipov from Kaspersky Labs reported the
vulnerability to NCCIC.

BACKGROUND

Critical Infrastructure Sectors: Energy

Countries/Areas Deployed: Asia

Company Headquarters Location: China

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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