ESB-2018.2113 - [Appliance] AVEVA InTouch: Execute arbitrary code/commands - Remote/unauthenticated 2018-07-20

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2113
                  Advisory (ICSA-18-200-02) AVEVA InTouch
                               20 July 2018

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

Product:           AVEVA InTouch
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10628  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-200-02

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Advisory (ICSA-18-200-02) AVEVA InTouch
Original release date: July 19, 2018

Legal Notice

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referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the
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1. EXECUTIVE SUMMARY

CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: AVEVA Software, LLC. (AVEVA)
Equipment: InTouch
Vulnerability: Stack-based Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an unauthenticated
user to remotely execute code with the same privileges as those of the
InTouch View process which could lead to a compromise of the InTouch HMI.
Systems are only vulnerable if the operating system locales do not use a
dot floating point separator.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of AVEVA InTouch, a HMI Platform, are affected:

InTouch 2014 R2 SP1 and prior,
InTouch 2017,
InTouch 2017 Update 1, and
InTouch 2017 Update 2

3.2 VULNERABILITY OVERVIEW

3.2.1    STACK-BASED BUFFER OVERFLOW CWE-121

An unauthenticated user could send a specially crafted packet that
could overflow the buffer on a locale not using a dot floating point
separator. Exploitation could allow remote code execution under the
privileges of the InTouch View process.

CVE-2018-10628 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Food and
Agriculture, Chemical, and Water and Wastewater
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: United Kingdom

3.4 RESEARCHER

George Lashenko of CyberX reported this vulnerability to NCCIC.

4. MITIGATIONS

AVEVA recommends the following mitigations for each version of software
affected:

InTouch 2014 R2 SP1 - Apply HF-11_1_SP1/CR149705 as soon as possible. Those
using versions of InTouch older than 2014 R2 SP1 should first upgrade to
a supported version of InTouch and then apply the corresponding hotfix.

https://softwaresupportsp.schneider-electric.com/#/producthub/details?id=5057

InTouch 2017 Update 2 - Apply HF-17_2/CR149706 as soon as possible. Those
using InTouch 2017 or 2017 Update 1 should first upgrade to InTouch 2017
Update 2, then apply HF-17_2/CR149706.

https://softwaresupportsp.schneider-electric.com/#/producthub/details?id=5058

For more information AVEVA has released a Security Bulletin:

https://sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec127(003).pdf

To contact AVEVA support visit:

https://softwaresupport.aveva.com/

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.

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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