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AUSCERT External Security Bulletin Redistribution
ESB-2018.2222
A vulnerability has been identified in Davolink DVW-3200N switches
1 August 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Davolink DVW-3200N Switches
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-10618
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-212-01
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Advisory (ICSA-18-212-01)
Davolink DVW-3200N
Original release date: July 31, 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 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Davolink
Equipment: DVW-3200N
Vulnerability: Use of Password Hash With Insufficient Computational Effort
2. RISK EVALUATION
Successful exploitation of this vulnerability may result in a remote attacker
obtaining the password to the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of DVW-3200N, a networking switch, are affected:
DVW-3200N all version prior to Version 1.00.06
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF PASSWORD HASH WITH INSUFFICIENT COMPUTATIONAL EFFORT CWE-916
The device generates a weak password hash that is easily cracked, allowing a
remote attacker to obtain the password for the device.
CVE-2018-10618 has been assigned to this vulnerability. A CVSS v3 base score
of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.3 BACKGROUND
CRITICAL INFRASTRUCTURE SECTORS: Information Technology
COUNTRIES/AREAS DEPLOYED: Asia and Europe
COMPANY HEADQUARTERS LOCATION: South Korea
3.4 RESEARCHER
Ankit Anubhav of NewSky Security reported this vulnerability to NCCIC.
4. MITIGATIONS
Davolink has produced a new firmware version for the device that can be
downloaded from:
http://www.davolink.co.kr/sys/bbs/board.php?bo_table=0403&wr_id=50
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 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.
No known public exploits specifically target this vulnerability.
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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