ESB-2018.0657 - [Appliance] Eaton ELCSoft PLCs: Execute arbitrary code/commands - Remote with user interaction 2018-03-07

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2018.0657
           A vulnerability has been identified in Eaton ELCSoft
                      Programmable Logic Controllers
                               7 March 2018

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

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

Product:           Eaton ELCSoft PLCs
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7511  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-065-03

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

Advisory (ICSA-18-065-03)

Eaton ELCSoft

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 6.3

ATTENTION: Exploitable remotely/low skill level to exploit.

Vendor: Eaton

Equipment: ELCSoft

Vulnerability: Improper Input Validation

AFFECTED PRODUCTS

ELCSoft is programming software for all Eaton ELC programmable logic 
controllers. The ELC programmable logic controllers are not affected by this 
vulnerability. The following versions of ELCSoft are affected:

ELCSoft Versions 2.04.02 and prior.

IMPACT

Successful exploitation of this vulnerability could allow an attacker to 
execute arbitrary code.

MITIGATION

Eaton has released new firmware for ELCSoft that is available via the 
following link:

http://www.eaton.com/ecm/idcplg?IdcService=GET_FILE&allowInterrupt=1&RevisionSelectionMethod=LatestReleased&noSaveAs=0&Rendition=Primary&dDocName=PCT_3313148

Eaton states the current firmware needs to be uninstalled prior to loading the
update.

NCCIC recommends users take defensive measures to minimize the risk of 
exploitation of this vulnerability. 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 website.

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.

No known public exploits specifically target this vulnerability.

VULNERABILITY OVERVIEW

IMPROPER INPUT VALIDATION CWE-20

There are multiple cases where specially crafted files could cause a buffer 
overflow which, in turn, may allow remote execution of arbitrary code.

CVE-2018-7511 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L).

RESEARCHER

Ariele Caltabiano (kimiya) and axt working with Trend Micro's Zero Day 
Initiative reported the vulnerability to NCCIC.

BACKGROUND

Critical Infrastructure Sectors: Energy

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Dublin, Ireland

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.

- --------------------------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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=Jk6u
-----END PGP SIGNATURE-----

« Back to bulletins