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AUSCERT External Security Bulletin Redistribution
ESB-2019.0847
Advisory (ICSA-19-073-03) PEPPERL+FUCHS WirelessHART-Gateways
15 March 2019
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AusCERT Security Bulletin Summary
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Product: PEPPERL+FUCHS WirelessHART-Gateways
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-16059
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-19-073-03
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Advisory (ICSA-19-073-03)
PEPPERL+FUCHS WirelessHART-Gateways
Original release date: March 14, 2019
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
o CVSS v3 5.3
o ATTENTION: Exploitable remotely/low skill level to exploit/public exploits
are available
o Vendor: PEPPERL+FUCHS
o Equipment: WirelessHART-Gateways
o Vulnerability: Path Traversal
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow access to files and
restricted directories stored on the device through the manipulation of file
parameters.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
o PEPPERL+FUCHS reports that all WHA-GW-* products are affected.
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH
TRAVERSAL') CWE-22
A path traversal vulnerability has been identified, which may allow
unauthorized disclosure of information.
CVE-2018-16059 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 ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Information
Technology
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
PEPPERL+FUCHS reported this vulnerability to CERT@VDE
4. MITIGATIONS
PEPPERL+FUCHS reports that affected users with WHA-GW-*-ETH devices should
upgrade to firmware Version 03.00.08. Affected users with WHA-GW-*-ETH.EIP
devices should upgrade to firmware Version 02.00.01.
For more information, please see the advisory CERT@VDE wrote for PEPPERL+FUCHS
at:
https://cert.vde.com/en-us/advisories/vde-2019-002
NCCIC recommends 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC 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
on the ICS-CERT website in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.
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