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AUSCERT External Security Bulletin Redistribution
ESB-2018.0656
Multiple vulnerabilities have been identified in Hirschmann Automation and
Control GmbH Classic Platform Switches
7 March 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Hirschmann Automation and Control GmbH Classic Platform Switches
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Unauthorised Access -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2018-5471 CVE-2018-5469 CVE-2018-5467
CVE-2018-5465 CVE-2018-5461
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-065-01
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Advisory (ICSA-18-065-01)
Hirschmann Automation and Control GmbH Classic Platform Switches
Original release date: March 06, 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/.
CVSS v3 7.5
ATTENTION: Exploitable remotely/high skill level is needed to exploit.
Vendor: Hirschmann Automation and Control GmbH, a division of Belden Inc.
Equipment: Classic Platform Switches
Vulnerabilities: Session Fixation, Information Exposure Through Query Strings
in GET Request, Cleartext Transmission of Sensitive Information, Inadequate
Encryption Strength, Improper Restriction of Excessive Authentication Attempts
AFFECTED PRODUCTS
Hirschmann reports that the vulnerabilities affect the following Classic
Platform Switches products:
RS all versions,
RSR all versions,
RSB all versions,
MACH100 all versions,
MACH1000 all versions,
MACH4000 all versions,
MS all versions, and
OCTOPUS all versions.
IMPACT
Successful exploitation of these vulnerabilities could allow the attacker to
hijack web sessions, impersonate a legitimate user, receive sensitive
information, and gain access to the device.
MITIGATION
Hirschmann strongly recommends users restrict access to remote management
access and the following mitigation strategies should be applied:
Disable HTTP for remote management access.
Use the secure HTTPS or SSH protocols for remote management access.
Use of complex user passwords.
Use the Restricted Management Access feature to restrict access to known IP
addresses.
Disable remote management access when not in use.
NCCIC recommends 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.
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 in the NCCIC 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 NCCIC for
tracking and correlation against other incidents.
In addition, NCCIC recommends that users take the following measures to
protect themselves from social engineering attacks:
Do not click web links or open unsolicited attachments in email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding
email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information
on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
VULNERABILITY OVERVIEW
SESSION FIXATION CWE-384
A session fixation vulnerability in the web interface has been identified,
which may allow an attacker to hijack web sessions.
CVE-2018-5465 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
INFORMATION EXPOSURE THROUGH QUERY STRINGS IN GET REQUEST CWE-598
An information exposure through query strings vulnerability in the web
interface has been identified, which may allow an attacker to impersonate a
legitimate user.
CVE-2018-5467 has been assigned to this vulnerability. A CVSS v3 base score of
4.2 has been calculated; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N).
CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
A cleartext transmission of sensitive information vulnerability in the web
interface has been identified, which may allow an attacker to obtain sensitive
information through a successful man-in-the-middle attack.
CVE-2018-5471 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:H/PR:N/UI:R/S:U/C:H/I:N/A:N).
INADEQUATE ENCRYPTION STRENGTH CWE-326
An inadequate encryption strength vulnerability in the web interface has been
identified, which may allow an attacker to obtain sensitive information
through a successful man-in-the-middle attack.
CVE-2018-5461 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N).
IMPROPER RESTRICTION OF EXCESSIVE AUTHENTICATION ATTEMPTS CWE-307
An improper restriction of excessive authentication vulnerability in the web
interface has been identified, which may allow an attacker to brute force
authentication.
CVE-2018-5469 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
RESEARCHER
Ilya Karpov, Evgeniy Druzhinin, Mikhail Tsvetkov, and Damir Zainullin of
Positive Technologies reported these vulnerabilities to Belden.
BACKGROUND
Critical Infrastructure Sectors: Multiple sectors
Countries/Areas Deployed: Worldwide
Company Headquarters Location: St. Louis, Missouri
Contact Information
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
http://ics-cert.us-cert.gov
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
The NCCIC 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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