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AUSCERT External Security Bulletin Redistribution
ESB-2018.1040
Advisory (ICSA-18-095-02) Moxa MXview
6 April 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Moxa MXview
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-7506
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-095-02
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Advisory (ICSA-18-095-02) Moxa MXview
Original release date: April 05, 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 7.5
ATTENTION: Exploitable remotely/low skill level to exploit.
Vendor: Moxa
Equipment: MXview
Vulnerabilities: Information Exposure
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow a remote attacker to
access and read cryptographic private keys.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of MXview, network management software, are affected:
MXview versions 2.8 and prior.
3.2 VULNERABILITY OVERVIEW
3.2.1 INFORMATION EXPOSURE CWE-200
The private key of the web server is able to be read and accessed via an HTTP
GET request, which may allow a remote attacker to decrypt encrypted
information.
CVE-2018-7506 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
3.3 BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing, Energy,
Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
3.4 RESEARCHER
Michael DePlante of Leahy Center for Digital Investigation at Champlain
College reported this vulnerability to NCCIC.
4. MITIGATIONS
Moxa has developed a new version of MXview to mitigate the vulnerability.
MXview versions 2.9 can be downloaded from the Moxa Support Website (link is
external).
NCCIC recommends that users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet.
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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