ESB-2017.2111 - [Appliance] SpiderControl SCADA MicroBrowser: Execute arbitrary code/commands - Remote with user interaction 2017-08-23

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2111
        Advisory (ICSA-17-234-02) SpiderControl SCADA MicroBrowser
                              23 August 2017

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

Product:           SpiderControl SCADA MicroBrowser
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12707  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-234-02

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Advisory (ICSA-17-234-02)

SpiderControl SCADA MicroBrowser

Original release date: August 22, 2017

Legal Notice

All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/.

CVSS v3 7.3

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: SpiderControl

Equipment: SCADA MicroBrowser

Vulnerability: Stack-based Buffer Overflow

AFFECTED PRODUCTS

The following versions of SCADA MicroBrowser, a software management platform,
are affected:

SCADA MicroBrowser Versions 1.6.30.144 and prior.

IMPACT

Successful exploitation of this vulnerability could allow an attacker to gain
access to the system, manipulate system files, and potentially render the 
system unavailable.

MITIGATION

SpiderControl has produced a new version of the software (Version 1.6.40.148)
that can be found at:

http://www.ininet.ch/public/MicroBrowser/XP/index.html (link is external)

NCCIC/ICS-CERT recommends that 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.

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.

VULNERABILITY OVERVIEW

STACK-BASED BUFFER OVERFLOW CWE-121

Opening a maliciously crafted html file may cause a stack overflow.

CVE-2017-12707 has been assigned to this vulnerability. A CVSS v3 base score 
of 7.3 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

RESEARCHER

Karn Ganeshen, working with Trend Micros Zero Day Initiative (ZDI), discovered
this vulnerability.

BACKGROUND

Critical Infrastructure Sector: Critical Manufacturing

Countries/Areas Deployed: Europe

Company Headquarters Location: Switzerland

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: 
http://ics-cert.us-cert.gov

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 
product.

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