ESB-2018.1414 - [Win] Siemens Siveillance Video Management Software: Execute arbitrary code/commands - Remote/unauthenticated 2018-05-09

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1414
                Vulnerabilities patched in Siveillance VMS
                                9 May 2018

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

Product:           Siemens Siveillance Video Management Software
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7891  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-128-02

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Siemens Siveillance VMS

Original release date: May 08, 2018

Legal Notice

All information products included in http://ics-cert.us-cert.gov are
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For more information about TLP, see http://www.us-cert.gov/tlp/.

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1. EXECUTIVE SUMMARY

  * CVSS v3 8.1
  * ATTENTION: Exploitable remotely
  * Vendor: Siemens
  * Equipment: Siveillance Video Management Software (VMS)
  * Vulnerability: Deserialization of Untrusted Data

2. RISK EVALUATION

Successful exploitation of this vulnerability by the affected ports in .NET
Remoting deserialization could allow elevation of privileges and/or cause a
denial-of-service.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Siveillance VMS, an IP video management software, are
affected:

  * Siveillance VMS 2016 R1, all versions prior to V10.0a,
  * Siveillance VMS 2016 R2, all versions prior to V10.1a,
  * Siveillance VMS 2016 R3, all versions prior to V10.2b,
  * Siveillance VMS 2017 R1, all versions prior to V11.1a,
  * Siveillance VMS 2017 R2, all versions prior to V11.2a, and
  * Siveillance VMS 2018 R1, all versions prior to V12.1a.

3.2 VULNERABILITY OVERVIEW

3.2.1   DESERIALIZATION OF UNTRUSTED DATA CWE-502

The Recording Server, Management Server, and Management Client on Ports 6473/
TCP local connection only, 7474/TCP, 8966/TCP local connection only, and Port
9993/TCP use an exploitable .NET Framework Remoting deserialization level.

An attacker could exploit this vulnerability by accessing the vulnerable ports,
allowing elevation of privileges or causing a denial-of-service; compromising
confidentiality, integrity, and availability of the targeted system.

CVE-2018-7891 has been assigned to this vulnerability. A CVSS v3 base score of
8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H
/I:H/A:H).

3.3 BACKGROUND

  * Critical Infrastructure Sectors: Unknown
  * Countries/Areas Deployed: Worldwide
  * Company Headquarters Location: Germany

3.4 RESEARCHER

Siemens ProductCERT reported this vulnerability to NCCIC.

4. MITIGATIONS

Siemens has released updates for several affected products and recommends users
update to the new version.

  * Siveillance VMS 2016 R1: Update to V10.0a
  * Siveillance VMS 2016 R2: Update to V10.1a
  * Siveillance VMS 2016 R3: Update to V10.2b
  * Siveillance VMS 2017 R1: Update to V11.1a
  * Siveillance VMS 2017 R2: Update to V11.2a
  * Siveillance VMS 2018 R1: Update to V12.1a

Retrieve hotfix from https://psp.sbt.siemens.com/ or contact Siveillance
Technical Support at siveillance.support.industry@siemens.com

As a general security measure, Siemens strongly recommends protecting network
access to devices with appropriate mechanisms. In order to run the devices in a
protected IT environment, Siemens specifically recommends users configure the
environment according to Siemens? Operational Guidelines for Industrial
Security and follow the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at:

https://www.siemens.com/industrialsecurity

For more information on this vulnerability and associated software updates,
please see Siemens security advisory SSA-457058 on their website:

https://www.siemens.com/cert/advisories:

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
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 this vulnerability. High skill
level is needed to exploit.


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?

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