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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1248 Advisory (ICSA-17-136-03) Hanwha Techwin SRN-4000 17 May 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Hanwha Techwin SRN-4000 Publisher: ICS-CERT Operating System: Windows Impact/Access: Administrator Compromise -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-7912 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-136-03 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-136-03) Hanwha Techwin SRN-4000 Original release date: May 16, 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: Hanwha Techwin Equipment: SRN-4000 Vulnerability: Unauthenticated Access AFFECTED PRODUCTS The following versions of SRN-4000, a network video management platform, are affected: SRN-4000 firmware versions prior to SRN4000_v2.16_170401. IMPACT Successful exploitation of this vulnerability could allow the attacker remote access to the web management portal with admin privileges without authentication. MITIGATION 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. VULNERABILITY OVERVIEW 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 authentication. 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 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Can Demirel and Faruk Unal of Biznet Bilisim discovered the vulnerability and have tested the patch. BACKGROUND Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy, Water and Wastewater Systems. Countries/Areas Deployed: Worldwide Company Headquarters Location: Seoul, South Korea - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBWRuo4Yx+lLeg9Ub1AQjk3BAAg+XFKZqqjTJji+xQi0mdZ7heWv+mIfve wweiyGn+3DcRTA1UAx8y7SlqdeiIdTWwGMWwL5WAcas5toKWxgJvEM/01iPqSf+U 5n29l2u3sJoDxp9i5d2rfuH3jotl2QydA8heJOR6sKNFLdTNWV2a1TJGWdCfAoqN Lc4etzEkEAieXT74rdsk8KpohQbAUXAuPgIJllixPGZWsKn+jODmvYnKgohIYix1 LSm8Zzt3+J0EeU8+orZZuMQ8frFaQ1pkoNOHn8OMn3E4R2e4WbdisF4GSTzS9hdD 0o/x7XN1C5b3hbKK7vIOUr/KgiEovVDpveugae/WkQm4i7EPHncS8se/j/paypJ9 EoZwjP9UZQbTNiZkfgMxGerl9QqqdpUVqEKeJJPd/HUYC8iga2h2pyVBdLcmpNR6 HwjA8aOx1qu+BfLfc1v3NvnPGgbMFy3xObsdLCIK8c2T8MIMXQ7ERrNg2Z9qM6P1 gICazimdiRYL9m5BnE13N76BWWvFhvAUIXsVApQDkPCKSUxqNzi8+4POahxtoHuK ZHizbd8/cWS0TQ+UQIfZ7WgNr2mvJnSMXaZFPFNKk5eAlL4vBzOrmNpNG8wgR1wz 1pnOwa7YDh2D3wIjuvPM+Pqkstyx4gxlmHGFosSKskOEe5a8LvpCJGdMEbF2Zvrr qM6Vp0OAi1M= =Pmz9 -----END PGP SIGNATURE-----