ESB-2017.1909 - [Win] Mitsubishi Electric Europe B.V. E-Designer: Multiple vulnerabilities 2017-08-02

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1909
                Mitsubishi Electric Europe B.V. E-Designer
                               2 August 2017

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

Product:           Mitsubishi Electric Europe B.V. E-Designer
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Alternate Program
CVE Names:         CVE-2017-9638 CVE-2017-9636 CVE-2017-9634

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-213-01

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Advisory (ICSA-17-213-01)
Mitsubishi Electric Europe B.V. E-Designer

Original release date: August 01, 2017

Legal Notice

All information products included in http://ics-cert.us-cert.gov are provided
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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 9.8

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Mitsubishi Electric Europe B.V.

Equipment: E-Designer

Vulnerabilities: Heap-Based Buffer Overflow, Stack-Based Buffer Overflow,
Out-of-Bounds Write

AFFECTED PRODUCTS

The following version of E-Designer, a Mitsubishi Electric Europe
B.V. product to program HMIs for E1000 products, is affected:

    E-Designer, Version 7.52 Build 344.

IMPACT

Successful exploitation of these vulnerabilities can result in corruption
of sensitive information, system crash, denial of service, and arbitrary
code execution.

MITIGATION

Mitsubishi recommends the following actions to mitigate these
vulnerabilities:

    Use E-Designer in a safe, firewalled network.
    Replace E-Designer HMIs with interfaces built with Mitsubishi's new
    product, GT Works. E-Designer has been discontinued.

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 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 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.

VULNERABILITY OVERVIEW

STACK-BASED BUFFER OVERFLOW CWE-121

Six code sections have been identified in which exploiting this vulnerability
can overwrite the stack. This can result in arbitrary code execution,
compromised data integrity, denial of service, and system crash.

CVE-2017-9638 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

HEAP-BASED BUFFER OVERFLOW CWE-122

Five code sections have been identified in which exploiting this
vulnerability can overwrite the heap. This can result in arbitrary code
execution, compromised data integrity, denial of service, and system crash.

CVE-2017-9636 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

OUT-OF-BOUNDS WRITE CWE-787

Two code sections have been identified in which exploiting this vulnerability
can allow a remote attacker to write data to arbitrary memory locations. This
can result in arbitrary code execution, compromised data integrity, denial
of service, and system crash.

CVE-2017-9634 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

RESEARCHER

Andrea "rgod" Micalizzi, working with Trend Micro's Zero Day
Initiative, disclosed these vulnerabilities.

BACKGROUND

Critical Infrastructure Sector: Critical Manufacturing

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Tokyo, Japan

Contact Information

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

Email: ics-cert@hq.dhs.gov
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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