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             AUSCERT External Security Bulletin Redistribution

                  Schneider Electric Wonderware Historian
                              25 January 2017


        AusCERT Security Bulletin Summary

Product:           Schneider Electric Wonderware Historian
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2017-5155  

Original Bulletin: 

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Advisory (ICSA-17-024-01)

Schneider Electric Wonderware Historian

Original release date: January 24, 2017

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CVSS V3 7.3

ATTENTION: Remotely exploitable/Low skill level to exploit

Vendor: Schneider Electric

Equipment: Wonderware Historian

Vulnerability: Credentials Management


The following Wonderware Historian versions are affected:

Wonderware Historian 2014 R2 SP1 P01 and earlier.


Successful exploitation of this vulnerability could allow a malicious entity 
to compromise Historian databases. In some installation scenarios, SQL 
resources beyond those created by Wonderware Historian may be compromised as 


Schneider Electric strongly recommends that the following steps be taken to 
mitigate this vulnerability:

Identify where the logins are used. Some likely places for the logins to have
been used are:

Wonderware Historian Client,

Wonderware InTouch and Application Object scripts,

Wonderware Information Server configuration, and

Custom applications not supplied by Schneider Electric that interact with 
Historian data.

Logins that are not used should be disabled from the SQL Server Management 

For logins that are still in use, the passwords should be changed from the 

For an increased level of security, Schneider Electric and Microsoft further 
advise that connectivity to SQL Server be accomplished with Windows Integrated
Security as opposed to using native SQL logins.

NCCIC/ICS-CERT recommends that users take defensive measures to minimize the 
risk of exploitation of these vulnerabilities. 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.

ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying defensive measures.

ICS-CERT 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 in the ICSCERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site.

Organizations observing any suspected malicious activity should follow their 
established internal procedures and report their findings to ICS-CERT for 
tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability. This 
vulnerability is not remotely exploitable. Low skill level is needed to 



Wonderware Historian creates logins with default passwords, which can allow a
malicious entity to compromise Historian databases. In some installation 
scenarios, resources beyond those created by Wonderware Historian may be 
compromised as well.

CVE-2017-5155 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been assigned; the CVSS vector string is 


Ruslan Habalov and Jan Bee of the Google ISA Assessments Team discovered this

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)

Toll Free: 1-877-776-7585

International Callers: (208) 526-0900

For industrial control systems security information and incident reporting: 

ICS-CERT continuously strives to improve its products and services. You can 
help by choosing one of the links below to provide feedback about this 

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