ESB-2018.1415 - [Apple iOS][Android] Siemens Siveillance VMS Video Mobile App: Multiple vulnerabilities 2018-05-09

Printable version
PGP/GPG verifiable version

Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

        Vulnerabilities patched in Siveillance VMS Video Mobile App
                                9 May 2018


        AusCERT Security Bulletin Summary

Product:           Siemens Siveillance VMS Video Mobile App
Publisher:         ICS-CERT
Operating System:  Android
                   Apple iOS
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-4849  

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

Siemens Siveillance VMS Video Mobile App

Original release date: May 08, 2018

Legal Notice

All information products included in 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

- -------------------------------------------------------------------------------


  * CVSS v3 4.8
  * ATTENTION: Exploitable remotely
  * Vendor: Siemens
  * Equipment: Siveillance VMS Video Mobile App
  * Vulnerability: Improper Certificate Validation


Successful exploitation of this vulnerability may allow an attacker in a
privileged network position to read data from and write data to the encrypted
communication channel between the app and a server.



Siemens reports that the vulnerability affects the following Siveillance VMS
Video Mobile Apps:

  * Siveillance VMS Video for Android, all versions prior to V12.1a (2018 R1),

  * Siveillance VMS Video for iOS: all versions prior to V12.1a (2018 R1)



Improper certificate validation could allow an attacker in a privileged network
position to read data from and write data to the encrypted communication
channel between the app and a server.

The vulnerability could be exploited by an attacker in a privileged network
position, which allows interception of the communication channel between the
affected app and a server (such as man-in-the-middle). However, an attacker
must be able to generate a certificate that results for the validation
algorithm in a checksum identical to a trusted certificate.

CVE-2018-4849 has been assigned to this vulnerability. A CVSS v3 base score of
4.8 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:L


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


Karsten Sohr from TZI Bremen reported this vulnerability to Siemens.


Siemens has provided the following updates and recommends that all users update
to the newest version:

  * Siveillance VMS Video for Android: Update to V12.1a (2018 R1)

  * Siveillance VMS Video for iOS: Update to V12.1a (2018 R1)

As a general security measure Siemens strongly recommends users protect network
access to affected products with appropriate mechanisms. It is advised to
follow recommended security practices in order to run the devices in a
protected IT environment.

For more information on this vulnerability and associated mitigation practices,
please see the Siemens security advisory SSA-468514 on their website:

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

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.

NCCIC also recommends that users take the following measures to protect
themselves from social engineering attacks:

  * Do not click web links or open unsolicited attachments in email messages.
  * Refer to Recognizing and Avoiding Email Scams for more information on
    avoiding email scams.
  * Refer to Avoiding Social Engineering and Phishing Attacks for more
    information on social engineering attacks.

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:

Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  http:// 
or incident reporting:

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email:
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.


« Back to bulletins