-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
Multiple Phoenix Contact products vulnerable to KRACK Attack
22 November 2017
AusCERT Security Bulletin Summary
Product: Phoenix Contact devices
Publisher: Phoenix Contact
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
CVE Names: CVE-2017-13080 CVE-2017-13078 CVE-2017-13077
- --------------------------BEGIN INCLUDED TEXT--------------------
PHOENIX CONTACT WLAN Capable Devices using the WPA2 Protocol
Original release date: November 21, 2017
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 6.8
ATTENTION: Public exploits are available.
Vendor: PHOENIX CONTACT
Equipment: WLAN capable devices using the WPA2 Protocol
Vulnerabilities: Reusing a Nonce
PHOENIX CONTACT reports that these vulnerabilities affect all versions of the
following WLAN capable devices using the WPA2 Protocol:
* BL2 BPC,
* BL2 PPC,
* FL COMSERVER WLAN 232/422/485,
* FL WLAN 110x,
* FL WLAN 210x,
* FL WLAN 510x,
* FL WLAN 230 AP 802-11,
* FL WLAN 24 AP 802-11,
* FL WLAN 24 DAP 802-11,
* FL WLAN 24 EC 802-11,
* FL WLAN EPA,
* FL WLAN SPA,
* ITC 8113,
* TPC 6013,
* VMT 30xx,
* VMT 50xx, and
* VMT 70xx.
Successful exploitation of these vulnerabilities could allow an attacker to
operate as a ?man-in-the-middle? between the device and the wireless access
PHOENIX CONTACT has reported that users operating embedded devices in AP mode
are not affected by these vulnerabilities. PHOENIX CONTACT is actively working
on discovering how these vulnerabilities affect its products and plans to
release future updates as they become available. For more information, please
see the advisory at this location:
PHOENIX CONTACT recommends that users apply the security update provided by
Microsoft at the following location for devices running Microsoft Windows:
If WPA-TKIP is being used for WLAN configuration, PHOENIX CONTACT recommends
the user switch to AES-CCMP immediately.
NCCIC/ICS-CERT recommends that 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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 ICS?CERT 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 ICS-CERT for
tracking and correlation against other incidents.
These vulnerabilities are not remotely exploitable. High skill level is needed
REUSING A NONCE, KEY PAIR IN ENCRYPTION CWE-323
Multiple products are affected by key reinstallation attacks known as KRACK.
The four-way hand shake traffic in the Wi-Fi Protected Access WPA and WPA2
protocol can be manipulated to allow nonce reuse resulting in key
reinstallation. This could allow an attacker to execute a ?man-in-the-middle?
attack, enabling the attacker within radio range to replay, decrypt, or spoof
The following CVEs have been assigned to this group of vulnerabilities:
CVE-2017-13077: reinstallation of the pairwise key in the four-way handshake,
CVE-2017-13078: reinstallation of the group key in the four-way handshake, and
CVE-2017-13080: reinstallation of the group key in the group key handshake,
A CVSS v3 base score of 6.8 has been assigned; the CVSS vector string is (AV:A/
Mathy Vanhoef of imec-DistriNet, KU Leuven discovered these vulnerabilities.
PHOENIX CONTACT reported these vulnerabilities to CERT@VDE. CERT@VDE
coordinated these vulnerabilities with ICS-CERT.
- --------------------------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 firstname.lastname@example.org
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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-----
-----END PGP SIGNATURE-----