ESB-2017.3150 - [Appliance] Xiongmai Technology IP Cameras and DVRs: Multiple vulnerabilities 2017-12-08

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.3150
     Advisory (ICSA-17-341-01) Xiongmai Technology IP Cameras and DVRs
                              8 December 2017

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

Product:           Xiongmai Technology IP Cameras and DVRs
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-16725  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-341-01

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Advisory (ICSA-17-341-01)

Xiongmai Technology IP Cameras and DVRs

Original release date: December 07, 2017

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 9.8

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Xiongmai Technology

Equipment: IP Cameras and DVRs

Vulnerability: Stack-based Buffer Overflow

AFFECTED PRODUCTS

The following versions of Xiongmai Technology IP cameras and DVRs are 
affected:

All IP Cameras and DVRs using the NetSurveillance Web interface.

IMPACT

Successful exploitation of this vulnerability could cause the device to reboot
and return to a more vulnerable state in which Telnet is accessible.

MITIGATION

Xiongmai Technology has not responded to requests to coordinate with 
NCCIC/ICS-CERT.

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.

VULNERABILITY OVERVIEW

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 
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

RESEARCHER

Independent researcher Clinton Mielke reported this vulnerability to ICS-CERT.

BACKGROUND

Critical Infrastructure Sector: Unknown

Countries/Areas Deployed: Worldwide

Company Headquarters Location: China

Contact Information

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: 
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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