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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.1018
        Advisory (icsa-20-079-01) Systech NDS-5000 Terminal Server
                               23 March 2020

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

Product:           NDS-5000 Terminal Server
Operating System:  Network Appliance
Impact/Access:     Cross-site Scripting            -- Existing Account            
                   Increased Privileges            -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
                   Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-7006  

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsa-20-079-01

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ICS Advisory (ICSA-20-079-01)

Systech NDS-5000 Terminal Server

Original release date: March 19, 2020

Legal Notice

All information products included in https://us-cert.gov/ics are provided"as
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1. EXECUTIVE SUMMARY

  o CVSS v3 6.8
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: Systech Corporation
  o Equipment: NDS-5000 Terminal Server
  o Vulnerability: Cross-site Scripting

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow information
disclosure, limit system availability, and may allow remote code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of NDS-5000 Terminal Server, a network server, are
affected:

  o NDS-5000 Terminal Server, NDS/5008 (8 Port, RJ45), firmware Version 02D.30

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79

The affected product is vulnerable to a stored cross-site scripting error,
which may allow an attacker to perform privileged operations on behalf of the
user, gain access to sensitive data belonging to the user, and remotely execute
arbitrary code.

CVE-2020-7006 has been assigned to this vulnerability. A CVSS v3 base score of
6.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:R/S:U/
C:H/I:H/A:H ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Murat Aydemir, Critical Infrastructure Penetration Test Specialist at Biznet
Bilisim A.S., reported this vulnerability to CISA.

4. MITIGATIONS

Systech released firmware Version 02F.6 that eliminates this vulnerability. For
further information on installing this update, contact Systech Technical
Support at support@systech.com .

CISA recommends 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.

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 this vulnerability.

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

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

CISA 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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