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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3150 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 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 - --------------------------BEGIN INCLUDED TEXT-------------------- 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. - --------------------------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 iQIVAwUBWioLlIx+lLeg9Ub1AQgOVw/+NeilEYzEClMNfnh8UEwUrPUy6WNMmAGJ pJCpw/C7bbhXGVL/ueSSa3v5hys4EOBziTnYQxEZGdtDW3N03tVE4sRdzS2vAc+o G1t83XXC95dw70NEIdwe9uQBAMOLf8PuzMGoTzvczPksrOlYJq0lSyICqhrCL6+c tXQXolM4CdbWb2STIJ5/rqlO88Xe5KEY29h/XnjbLn8ySUtQzWUQW/DyDtxKefiI p4hPpnChmxBYW6qxIeBsHVnuZoHSZOhifL7PCiJXsZs6FBq1CUBNFdxuPtvctElr IAWs0BOdTF6YmutLne/TwNuPK1bcA469aoPqEVZNKKNSJ90cAdnzVjJqnGVo0lG0 DFobgCa9jOT/GClOaM6hT0GmvMZRk73cd2w59tOxtf9OQPGyzX2zvQqCs0znKYID 24mmhwPlHb8ONP5foIo5LZpqebwtCviKD17ljjiOzfM232rxTmDCPddrKgrcD0FJ LjeA8fq4JNNPqEjdcMfok53GpYllPNAAeDJF4QGKfoWPJo76PLd/DtthMeAAP4l4 hiUto25vIdYvsLF09+4AE9r/AqzmZw7LjFpgJ2Siy+2h1yHTXdleK0fzHiCgeV5Y qKOwHfqiuRMEL1sKbb54iB2gRibQfndueIm/2DHmX1ZmeRCGKWvBsXVt9DATgsX5 XMyC5suV7R4= =cbal -----END PGP SIGNATURE-----