ESB-2018.1078 - [Win][Appliance] Omron CX-One: Multiple vulnerabilities 2018-04-11

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1078
         Advisory (ICSA-18-100-02): Multiple vulnerabilities have
                      been identified in Omron CX-One
                               11 April 2018

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

Product:           Omron CX-One
Publisher:         ICS-CERT
Operating System:  Network Appliance
                   Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-8834 CVE-2018-7530 CVE-2018-7514

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-100-02

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Advisory (ICSA-18-100-02)

Omron CX-One

Original release date: April 10, 2018

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/.

1. EXECUTIVE SUMMARY

CVSS v3 5.3

ATTENTION: Low skill level to exploit.

Vendor: Omron

Equipment: CX-One

Vulnerabilities: Stack-based Buffer Overflow, Heap-based Buffer Overflow, Type
Confusion.

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow remote code 
execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of CX-One are affected:

CX-One Versions 4.42 and prior, including the following applications:

CX-FLnet versions 1.00 and prior,

CX-Protocol versions 1.992 and prior,

CX-Programmer versions 9.65 and prior,

CX-Server versions 5.0.22 and prior,

Network Configurator versions 3.63 and prior, and

Switch Box Utility versions 1.68 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122

Parsing malformed project files may cause a heap-based buffer overflow.

CVE-2018-8834 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is 
(AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L).

3.2.2 STACK-BASED BUFFER OVERFLOW CWE-121

Parsing malformed project files may cause a stack-based buffer overflow.

CVE-2018-7514 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is 
(AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L).

3.2.3 ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (TYPE CONFUSION) CWE-843

Parsing malformed project files may allow the pointer to call an incorrect 
object resulting in an access of resource using incompatible type condition.

CVE-2018-7530 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is 
(AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L).

3.3 BACKGROUND

Critical Infrastructure Sectors: Critical Manufacturing

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Japan

3.4 RESEARCHER

Rgod, working with Trend Micro's Zero Day Initiative, reported these 
vulnerabilities to NCCIC.

4. MITIGATIONS

Omron has released an updated version of CX-One to address the reported 
vulnerabilities. These releases are available through the CX-One auto-update 
service.

CX-FLnet version 1.10,

CX-Protocol version 1.993,

CX-Programmer versions 9.66,

Common Module including CX-Server version 5.0.23,

Network Configurator version 3.64, and

Switch Box Utility version 1.69

NCCIC 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.

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

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 these vulnerabilities. These 
vulnerabilities are not exploitable remotely.

Contact Information

For any questions related to this report, please contact the NCCIC at:

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

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?

The NCCIC 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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