Operating System:

[Win]

Published:

12 July 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2582
          Advisory (icsa-19-192-05) AVEVA Vijeo Citect and Citect
                      SCADA Floating License Manager
                               12 July 2019

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

Product:           AVEVA Vijeo Citect and Citect SCADA Floating License Manager
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20034 CVE-2018-20033 CVE-2018-20032
                   CVE-2018-20031  

Reference:         ESB-2019.2577
                   ESB-2019.1146

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsa-19-192-05

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ICS Advisory (ICSA-19-192-05)

AVEVA Vijeo Citect and Citect SCADA Floating License Manager

Original release date: July 11, 2019

Legal Notice

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



1. EXECUTIVE SUMMARY

  o CVSS v3 9.8
  o ATTENTION : Exploitable remotely/low skill level to exploit
  o Vendor : AVEVA
  o Equipment : Vijeo Citect and Citect SCADA Floating License Manager
  o Vulnerabilities : Improper Input Validation, Memory Corruption

2. RISK EVALUATION

These vulnerabilities could allow an attacker to deny the acquisition of a
valid license for legal use of the product.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Floating License Manager, used in Vijeo Citect and
Citect SCADA, are affected:

  o Floating License Manager Version 2.3.0.0 and earlier

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER INPUT VALIDATION CWE-20
A denial of service vulnerability related to preemptive item deletion in
lmadmin and vendor daemon components allows a remote attacker to send a
combination of messages to lmadmin or the vendor daemon, causing the heartbeat
between lmadmin and the vendor daemon to stop and the vendor daemon to shut
down.
CVE-2018-20031 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).

3.2.2 IMPROPER INPUT VALIDATION CWE-20
A denial of service vulnerability related to message decoding in lmadmin and
vendor daemon components allows a remote attacker to send a combination of
messages to lmadmin or the vendor daemon, causing the heartbeat between lmadmin
and the vendor daemon to stop and the vendor daemon to shut down.
CVE-2018-20032 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).

3.2.3 MEMORY CORRUPTION CWE-119
A remote code execution vulnerability in lmadmin and vendor daemon components
allows a remote attacker to corrupt the memory by allocating/deallocating
memory, loading lmadmin or the vendor daemon and causing the heartbeat between
lmadmin and the vendor daemon to stop. This would force the vendor daemon to
shut down. No exploit of this vulnerability has been demonstrated.
CVE-2018-20033 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).

3.2.4 IMPROPER INPUT VALIDATION CWE-20
A denial of service vulnerability related to adding an item to a list in
lmadmin and vendor daemon components allows a remote attacker to send a
combination of messages to lmadmin or the vendor daemon, causing the heartbeat
between lmadmin and the vendor daemon to stop and the vendor daemon to shut
down.
CVE-2018-20034 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS : Energy
  o COUNTRIES/AREAS DEPLOYED : Worldwide
  o COMPANY HEADQUARTERS LOCATION : France

3.4 RESEARCHER

Schneider Electric reported these vulnerabilities to NCCIC.

4. MITIGATIONS

AVEVA states that users who have deployed Floating License Manager Version
2.3.0.0 and earlier to manage their Software Licensing for Vijeo Citect or
Citect SCADA (Version 7.30 and later) could be impacted.

Impacted users should upgrade to Floating License Manager (FLM) Version 2.3.1.0
as soon as possible.

FLM Version 2.3.1.0 is already available via SESU (Schneider Electric Software
Update tool).

Details are described in the Schneider Electric Security Notification
SEVD-2019-134-04 .

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 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
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.

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