ESB-2018.1829 - [Win] Delta Industrial Automation COMMGR: Multiple vulnerabilities 2018-06-22

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2018.1829
       Advisory (ICSA-18-172-01) Delta Electronics Delta Industrial
                             Automation COMMGR
                               22 June 2018

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

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

Product:           Delta Industrial Automation COMMGR
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10594  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-172-01

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

Advisory (ICSA-18-172-01) Delta Electronics Delta Industrial Automation COMMGR

Original release date: June 21, 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/.

1. EXECUTIVE SUMMARY

    CVSS v3 7.3
    ATTENTION: Exploitable remotely/low skill level to exploit
    Vendor: Delta Electronics
    Equipment: Delta Industrial Automation COMMGR
    Vulnerability: Stack-based Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability may allow remote code execution,
cause the application to crash, or cause a denial-of-service condition in the
application server.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Delta Industrial Automation COMMGR, a communication
management software, and accompanying PLC simulators are affected:

    COMMGR Version 1.08 and prior.
        DVPSimulator EH2, EH3, ES2, SE, SS2
        AHSIM_5x0, AHSIM_5x1

3.2 VULNERABILITY OVERVIEW

3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121

The application utilizes a fixed-length stack buffer where an unverified 
length value can be read from the network packets via a specific network port,
causing the buffer to be overwritten. This may allow remote code execution, 
cause the application to crash, or result in a denial-of-service condition in
the application server.

CVE-2018-10594 has been assigned to this vulnerability. A CVSS v3 base score 
of 7.3 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

3.3 BACKGROUND

    CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Communications, 
Critical Manufacturing, Energy, Healthcare and Public Health

    COUNTRIES/AREAS DEPLOYED: Worldwide
    COMPANY HEADQUARTERS LOCATION: Taiwan

3.4 RESEARCHER

An anonymous researcher working with Trend Micros Zero Day Initiative reported
this vulnerability to NCCIC.

4. MITIGATIONS

Delta Electronics has released COMMGR v1.09 to address this vulnerability and
recommends users upgrade. The updated version can be downloaded at:

http://www.deltaww.com/Products/PluginWebUserControl/downloadCenterCounter.aspx?DID=2093&DocPath=1&hl=en-USl

Delta Electronics also recommends affected users apply application whitelists
to allow only trusted communications via Ports 502 and 10002.

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.

NCCIC also 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 this vulnerability.

- --------------------------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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=PPts
-----END PGP SIGNATURE-----

« Back to bulletins