ESB-2017.2905 - [Appliance] TropOS: Multiple vulnerabilities 2017-11-15

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2017.2905
             Key Reinstallation Attacks against TropOS Devices
                             15 November 2017

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

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

Product:           TropOS
Publisher:         ABB
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2017-13077 CVE-2017-13078 CVE-2017-13079
                   CVE-2017-13080 CVE-2017-13081 CVE-2017-13082
                   CVE-2017-13084 CVE-2017-13086 CVE-2017-13087
                   CVE-2017-13088  

Reference:         ESB-2017.2599
                   ESB-2017.2600
                   ESB-2017.2601.3

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-318-02

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

Advisory (ICSA-17-318-02)

ABB TropOS

Original release date: November 14, 2017

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 6.8

Vendor: ABB

Equipment: TropOS

Vulnerabilities: Security Features

AFFECTED PRODUCTS

ABB reports that the key reinstallation attacks (KRACK) potentially affect all
TropOS broadband mesh routers and bridges operating on Mesh OS release 8.5.2 or
prior.

IMPACT

Successful exploitation of these vulnerabilities could allow an attacker to
decrypt, replay, and forge some frames on a WPA2 encrypted network.

MITIGATION

ABB is working on remedial actions for all affected products.

ABB has released an advisory (1KHW02890) on their alerts and notification page:

http://search-ext.abb.com/library/Download.aspx?DocumentID=1KHW02890&Action=
Launch

This advisory will be updated when firmware, including remedial measures, is
available.

The TropOS mesh wireless interfaces are not vulnerable. Wired client interfaces
(Ethernet, Serial) are not vulnerable. An attacker must be in physical
proximity of the Wi-Fi access point and connected client to be successful. If
the communication across the Wi-Fi link is encrypted at Layer 3 (e.g., SSH,
SSL, HTTPS, or SNMPv3 encrypted), privacy is maintained during an otherwise
successful attack. If possible, encrypt communication across the Wi-Fi link at
Layer 3 using SSH, SSL, HTTPS, or SNMPv3. There is no complete workaround which
allows protected Wi-Fi access to the TropOS Mesh.

ABB users with a current Complete Software Care or Complete Software + Hardware
Care subscription are advised to contact ABB Wireless support on phone +1(408)
331 6800, ext. 4, or email tropos.support@nam.abb.com.

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 have been publicly disclosed. These vulnerabilities are
exploitable from adjacent networks. High skill level is needed to exploit.

VULNERABILITY OVERVIEW

SECURITY FEATURES CWE-254

An industry-wide vulnerability exists in the WPA2 key management algorithm
devices that use IEEE 802.11w, including the TropOS broadband mesh routers
listed above. The vulnerability may allow an attacker to decrypt, replay, and
forge some frames on a WPA2 encrypted network.

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,

CVE-2017-13079: reinstallation of the integrity group key in the four-way
handshake,

CVE-2017-13080: reinstallation of the group key in the group key handshake,

CVE-2017-13081: reinstallation of the integrity group key in the group key
handshake,

CVE-2017-13082: accepting a retransmitted fast BSS transition reassociation
request and reinstalling the pairwise key while processing it,

CVE-2017-13084: reinstallation of the STK key in the PeerKey handshake,

CVE-2017-13086: reinstallation of the tunneled direct-link setup (TDLS) PeerKey
(TPK) key in the TDLS handshake,

CVE-2017-13087: reinstallation of the group key (GTK) when processing a
wireless network management (WNM) sleep mode response frame, and

CVE-2017-13088: reinstallation of the integrity group key (IGTK) when
processing a wireless network management (WNM) sleep mode response frame.

A CVSS v3 base score of 6.8 has been calculated; the CVSS vector string is
(AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).

RESEARCHER

Mathy Vanhoef, of the Katholieke Universiteit Leuven in Belgium, discovered
this vulnerability.

BACKGROUND

Critical Infrastructure Sectors: Critical Manufacturing, Energy

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Switzerland


Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900

For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov

- --------------------------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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=rBVH
-----END PGP SIGNATURE-----

« Back to bulletins