ESB-2019.0847 - [Appliance] PEPPERL+FUCHS WirelessHART-Gateways: Access confidential data - Remote/unauthenticated 2019-03-15

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0847
       Advisory (ICSA-19-073-03) PEPPERL+FUCHS WirelessHART-Gateways
                               15 March 2019

===========================================================================

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

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

- --------------------------BEGIN INCLUDED TEXT--------------------

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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=wSdZ
-----END PGP SIGNATURE-----

« Back to bulletins