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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-17-136-03) Hanwha Techwin SRN-4000
17 May 2017
AusCERT Security Bulletin Summary
Product: Hanwha Techwin SRN-4000
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
CVE Names: CVE-2017-7912
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Hanwha Techwin SRN-4000
Original release date: May 16, 2017
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CVSS v3 9.8
ATTENTION: Remotely exploitable/low skill level to exploit
Vendor: Hanwha Techwin
Vulnerability: Unauthenticated Access
The following versions of SRN-4000, a network video management platform, are
SRN-4000 firmware versions prior to SRN4000_v2.16_170401.
Successful exploitation of this vulnerability could allow the attacker remote
access to the web management portal with admin privileges without
Hanwha Techwin recommends that users update to firmware Version
SRN4000_v2.16_170401.zip or newer.
The latest firmware version can be obtained from the following location:
https://www.hanwha-security.com/ (link is external)
(Products > Video Recorders > SRN-4000 > Download > Firmware)
NCCIC/ICS-CERT recommends that 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.
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 ICSCERT 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.
No known public exploits specifically target this vulnerability.
IMPROPER ACCESS CONTROL CWE-284
A specially crafted http request and response could allow an attacker to gain
access to the device management page with admin privileges without proper
CVE-2017-7912 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is
Can Demirel and Faruk Unal of Biznet Bilisim discovered the vulnerability and
have tested the patch.
Critical Infrastructure Sectors: Commercial Facilities, Critical
Manufacturing, Energy, Water and Wastewater Systems.
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Seoul, South Korea
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