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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.2416
                 Moxa ioLogik E1200 Series Vulnerabilities
                              14 October 2016

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

Product:           Moxa ioLogik E1200 Series Vulnerabilities
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data     -- Remote/Unauthenticated      
                   Cross-site Request Forgery -- Remote with User Interaction
                   Cross-site Scripting       -- Remote with User Interaction
                   Reduced Security           -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-8379 CVE-2016-8372 CVE-2016-8359
                   CVE-2016-8350  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-16-287-05

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Advisory (ICSA-16-287-05)

Moxa ioLogik E1200 Series Vulnerabilities

Original release date: October 13, 2016

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/.

OVERVIEW

Alexandru Ariciu of Applied Risk has identified vulnerabilities in Moxa's
ioLogik E1200 series application. Moxa has produced a new edition of the
firmware to mitigate these vulnerabilities. Alexandru Ariciu has tested
the firmware to validate that it resolves the vulnerabilities.

These vulnerabilities could be exploited remotely. Exploits that target
these vulnerabilities are known to be publicly available.

AFFECTED PRODUCTS

Moxa reports that the vulnerabilities affect the following products:

    ioLogik E1210, firmware Version V2.4 and prior,
    ioLogik E1211, firmware Version V2.3 and prior,
    ioLogik E1212, firmware Version V2.4 and prior,
    ioLogik E1213, firmware Version V2.5 and prior,
    ioLogik E1214, firmware Version V2.4 and prior,
    ioLogik E1240, firmware Version V2.3 and prior,
    ioLogik E1241, firmware Version V2.4 and prior,
    ioLogik E1242, firmware Version V2.4 and prior,
    ioLogik E1260, firmware Version V2.4 and prior, and
    ioLogik E1262, firmware Version V2.4 and prior.

IMPACT

An attacker who exploits these vulnerabilities may be able to remotely
execute arbitrary code, modify parameters and settings, or reset the device.

Impact to individual organizations depends on many factors that are unique
to each organization. NCCIC/ICS-CERT recommends that organizations evaluate
the impact of these vulnerabilities based on their operational environment,
architecture, and product implementation.

BACKGROUND

Moxa is a Taiwan-based company that maintains offices in several countries
around the world, including the US, UK, India, Germany, France, China,
Russia, and Brazil.

The affected product, ioLogik E1200 series, is a remote I/O for use in
monitoring. According to Moxa, ioLogik is deployed across several sectors,
including Commercial Facilities and Energy. Moxa estimates that these
products are used primarily in the United States, Europe, and Asia.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

CROSS-SITE SCRIPTING[a]

The web application fails to sanitize user input, which may allow an
attacker to inject script or execute arbitrary code.

CVE-2016-8359[b] has been assigned to this vulnerability. A CVSS
v3 base score of 8.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).[c]

INSUFFICIENTLY PROTECTED CREDENTIALS[d]

A password is transmitted in a format that is not sufficiently secure.

CVE-2016-8372[e] has been assigned to this vulnerability. A CVSS
v3 base score of 8.1 has been calculated; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).[f]

WEAK PASSWORD REQUIREMENTS[g]

Users are restricted to using short passwords.

CVE-2016-8379[h] has been assigned to this vulnerability. A CVSS
v3 base score of 8.1 has been calculated; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).[i]

CROSS-SITE REQUEST FORGERY[j]

The web application may not sufficiently verify whether a request was
provided by a valid user.

CVE-2016-8350[k] has been assigned to this vulnerability. A CVSS
v3 base score of 7.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).[l]

VULNERABILITY DETAILS

EXPLOITABILITY

These vulnerabilities could be exploited remotely.

EXISTENCE OF EXPLOIT

Detailed vulnerability information is publicly available that could be
used to develop an exploit that targets these vulnerabilities.

DIFFICULTY

An attacker with a low skill would be able to exploit these vulnerabilities.

MITIGATION

Moxa has created new firmware to mitigate these vulnerabilities. It
recommends that all users upgrade to the latest version. Moxa recommends
installing the latest edition of the firmware, which can be downloaded at
the following location:

    ioLogik E1210 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12462

    ioLogik E1211 V2.4:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12469

    ioLogik E1212 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12467

    ioLogik E1213 V2.6:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12466

    ioLogik E1214 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12464

    ioLogik E1240 V2.4:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12460

    ioLogik E1241 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12461

    ioLogik E1242 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12458

    ioLogik E1260 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12463

    ioLogik E1262 V2.5:

http://www.moxa.com/support/DownloadFile.aspx?type=support&id=12465

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.

    a.
    CWE-79: Improper Neutralization of Input During Web Page Generation
    ('Cross-site Scripting'), https://cwe.mitre.org/data/definitions/79.html,
    web site last accessed October 13, 2016.
    b.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-8359,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    c.
    CVSS Calculator,
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S...,
    web site last accessed October 13, 2016.
    d.
    CWE-522: Insufficiently Protected Credentials,
    https://cwe.mitre.org/data/definitions/522.html, web site last accessed
    October 13, 2016.
    e.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-8372,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    f.
    CVSS Calculator,
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S...,
    web site last accessed October 13, 2016.
    g.
    CWE-521: Weak Password Requirements,
    https://cwe.mitre.org/data/definitions/521.html, web site last accessed
    October 13, 2016.
    h.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-8379,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    i.
    CVSS Calculator,
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S...,
    web site last accessed October 13, 2016.
    j.
    CWE-352: Cross-Site Request Forgery (CSRF),
    https://cwe.mitre.org/data/definitions/352.html, web site last accessed
    October 13, 2016.
    k.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-8350,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    l.
    CVSS Calculator,
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
    web site last accessed October 13, 2016.


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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