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AUSCERT External Security Bulletin Redistribution
ESB-2016.2896
Moxa MiiNePort Session Hijack Vulnerabilities
9 December 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Moxa MiiNePort
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-9346 CVE-2016-9344
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-16-343-01
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Advisory (ICSA-16-343-01)
Moxa MiiNePort Session Hijack Vulnerabilities
Original release date: December 08, 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
Independent researcher Aditya Sood has identified vulnerabilities in
Moxa's MiiNePort. Moxa has produced new firmware editions to mitigate
these vulnerabilities.
These vulnerabilities could be exploited remotely.
AFFECTED PRODUCTS
Moxa reports that the vulnerabilities affect the following versions of
MiiNePort:
MiiNePort E1 versions prior to 1.8,
MiiNePort E2 versions prior to 1.4, and
MiiNePort E3 versions prior to 1.1
IMPACT
An attacker may be able to gain user-level access to the target system by
exploiting these vulnerabilities.
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, the UK, India, Germany, France, China,
Russia, and Brazil.
The affected product, MiiNePort, is a serial device server module. According
to Moxa, MiiNePort is deployed across several sectors including Commercial
Facilities, Critical Manufacturing, Energy, and Transportation Systems. Moxa
estimates that this product is used primarily in the United States and
Europe with a small percentage
in Asia.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
PERMISSIONS, PRIVILEGES, AND ACCESS CONTROLS[a]
An attacker may be able to brute force an active session cookie to be able
to download configuration files.
CVE-2016-9344[b] has been assigned to this vulnerability. A CVSS
v3 base score of 5.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).[c]
CLEARTEXT STORAGE OF SENSITIVE INFORMATION[d]
Configuration data are stored in a file that is not encrypted.
CVE-2016-9346[e] has been assigned to this vulnerability. A CVSS
v3 base score of 5.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).[f]
VULNERABILITY DETAILS
EXPLOITABILITY
These vulnerabilities could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target these vulnerabilities.
DIFFICULTY
An attacker with a low skill would be able to exploit these vulnerabilities.
MITIGATION
Moxa has released new firmware editions, which address the identified
vulnerabilities in MiiNePort devices. Moxa recommends installing these
new firmware editions:
MiiNePort E1 Series, Edition 1.8
http://www.moxa.com/support/download.aspx?type=support&id=1214
MiiNePort E2 Series, Edition 1.4
http://www.moxa.com/support/download.aspx?type=support&id=263
MiiNePort E3 Series, Edition 1.1
http://www.moxa.com/support/download.aspx?type=support&id=2058
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-264: Permissions, Privileges, and Access Controls,
https://cwe.mitre.org/data/definitions/264.html, web site last accessed
December 08, 2016.
b.
NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9344,
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:N/S...,
web site last accessed December 08, 2016.
d.
CWE-312: Cleartext Storage of Sensitive Information,
https://cwe.mitre.org/data/definitions/312.html, web site last accessed
December 08, 2016.
e.
NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9346,
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:L/PR:N/UI:N/S...,
web site last accessed December 08, 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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