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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-18-095-02) Moxa MXview
6 April 2018
AusCERT Security Bulletin Summary
Product: Moxa MXview
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
CVE Names: CVE-2018-7506
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Advisory (ICSA-18-095-02) Moxa MXview
Original release date: April 05, 2018
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1. EXECUTIVE SUMMARY
CVSS v3 7.5
ATTENTION: Exploitable remotely/low skill level to exploit.
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
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
Critical Infrastructure Sectors: Critical Manufacturing, Energy,
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
Michael DePlante of Leahy Center for Digital Investigation at Champlain
College reported this vulnerability to NCCIC.
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
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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