Operating System:

[Win]

Published:

12 June 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2095
             Advisory (ICSA-19-162-01) Siemens Siveillance VMS
                               12 June 2019

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

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

Product:           Siemens Siveillance VMS
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Reduced Security -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6582 CVE-2019-6581 CVE-2019-6580

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-19-162-01

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Advisory (ICSA-19-162-01)

Siemens Siveillance VMS

Original release date: June 11, 2019

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1. EXECUTIVE SUMMARY

  o CVSS v3 8.8
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: Siemens
  o Equipment: Siveillance VMS
  o Vulnerabilities: Improper Authorization, Incorrect User Management, Missing
    Authorization

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker with
network access to Port 80/TCP to change device properties, user roles, and
user-defined event properties.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Siveillance VMS are affected:

  o 2017 R2 all versions prior to v11.2a
  o 2018 R1 all versions prior to v12.1a
  o 2018 R2 all versions prior to v12.2a
  o 2018 R3 all versions prior to v12.3a
  o 2019 R1 all versions prior to v13.1a

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER AUTHORIZATION CWE-285

An attacker with network access to Port 80/TCP could change device properties
without authorization.

CVE-2019-6580 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:H/
I:H/A:H ).

3.2.2 INCORRECT USER MANAGEMENT CWE-286

An attacker with network access to Port 80/TCP could change user roles without
proper authorization.

CVE-2019-6581 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:H/
I:H/A:H ).

3.2.3 MISSING AUTHORIZATION CWE-862

An attacker with network access to Port 80/TCP can change user-defined event
properties without proper authorization.

CVE-2019-6582 has been assigned to this vulnerability. A CVSS v3 base score of
7.1 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:N/
I:H/A:L ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS : Critical Manufacturing, Commercial
    Facilities
  o COUNTRIES/AREAS DEPLOYED : Worldwide
  o COMPANY HEADQUARTERS LOCATION : Germany

3.4 RESEARCHER

Siemens PSIRT reported these vulnerabilities to NCCIC.

4. MITIGATIONS

Siemens has released the following updates to the Siveillance VMS products:
o 2017 R2 v11.2a
o 2018 R1 v12.1a
o 2018 R2 v12.2a
o 2018 R3 v12.3a
o 2019 R1 v13.1a

Updates can be found at:

https://support.industry.siemens.com/cs/ww/en/ps/24899/dl

Siemens also recommends applying the following specific mitigation to reduce
risk:

o Block Port 80/TCP at an external firewall.

For more information please see Siemens security advisory SSA-212009.

NCCIC recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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.

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