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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-17-341-01) Xiongmai Technology IP Cameras and DVRs
8 December 2017
AusCERT Security Bulletin Summary
Product: Xiongmai Technology IP Cameras and DVRs
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2017-16725
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Xiongmai Technology IP Cameras and DVRs
Original release date: December 07, 2017
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
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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 9.8
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Xiongmai Technology
Equipment: IP Cameras and DVRs
Vulnerability: Stack-based Buffer Overflow
The following versions of Xiongmai Technology IP cameras and DVRs are
All IP Cameras and DVRs using the NetSurveillance Web interface.
Successful exploitation of this vulnerability could cause the device to reboot
and return to a more vulnerable state in which Telnet is accessible.
Xiongmai Technology has not responded to requests to coordinate with
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.
STACK-BASED BUFFER OVERFLOW CWE-121
The stack-based buffer overflow vulnerability has been identified, which may
allow an attacker to execute code remotely or crash the device. After
rebooting, the device restores itself to a more vulnerable state in which
Telnet is accessible.
CVE-2017-16725 has been assigned to this vulnerability. A CVSS v3 base score
of 9.8 has been assigned; the CVSS vector string is
Independent researcher Clinton Mielke reported this vulnerability to ICS-CERT.
Critical Infrastructure Sector: Unknown
Countries/Areas Deployed: Worldwide
Company Headquarters Location: China
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov (link sends e-mail)
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
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
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