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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1977 Advisory (ICSA-17-220-02): Moxa SoftNVR-IA Live Viewer 10 August 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Moxa SoftNVR-IA Live Viewer Publisher: ICS-CERT Operating System: Network Appliance Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-5170 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-220-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-220-02) Moxa SoftNVR-IA Live Viewer Original release date: August 08, 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 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 7.2 Vendor: Moxa Equipment: SoftNVR-IA Live Viewer Vulnerability: Uncontrolled Search Path Element AFFECTED PRODUCTS The following versions of SoftNVR-IA Live Viewer, a video surveillance software designed for industrial automation systems, are affected: SoftNVR-IA Live Viewer, Version 3.30.3122 and prior versions. IMPACT Successful exploitation of this vulnerability may allow an attacker to execute code from a malicious DLL on the affected system with the same privileges as the application that loaded the malicious DLL. MITIGATION Moxa has provided software update Version 3.4 for SoftNVR-IA Live Viewer which fixes this vulnerability. Moxa recommends users update to the new version, which is available at the following location: https://www.moxa.com/support/download.aspx?type=support&id=11320 (link is external) 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 ICS-CERT 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. In addition, ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks: Do not click web links or open unsolicited attachments in email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploits specifically target this vulnerability. This vulnerability is not remotely exploitable. High skill level is needed to exploit. VULNERABILITY OVERVIEW UNCONTROLLED SEARCH PATH ELEMENT CWE-427 An uncontrolled search path element (DLL Hijacking) vulnerability has been identified. To exploit this vulnerability, an attacker could rename a malicious DLL to meet the criteria of the application, and the application would not verify that the DLL is correct. The attacker needs to have administrative access to the default install location in order to plant the insecure DLL. Once loaded by the application, the DLL could run malicious code at the privilege level of the application. CVE-2017-5170 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H). RESEARCHER Independent security researcher Karn Ganeshen identified this vulnerability. BACKGROUND Critical Infrastructure Sector(s): Critical Manufacturing, Energy, and Transportation Systems. Countries/Areas Deployed: Worldwide Company Headquarters Location: Taiwan Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov (link sends e-mail) Toll Free: 1-877-776-7585 International Callers: (208) 526-0900 For industrial control systems security information and incident reporting: http://ics-cert.us-cert.gov - --------------------------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 iQIVAwUBWYvFbIx+lLeg9Ub1AQgdCA//UKTLTVA/PLU+KxrRz6isA9oRQgFtaAuu ii+zyx/CCf5MwhfRlsK1sldEtU4EAP1OkdkHTOOYGkLQSOEBnI51srLIkitzmAxn 12WdvSofC3uS75g7HD4H1bSbpymMja+VNXZyFaR9P+TVHTha+XlY0F49XvihgCa/ kBMMY5G166EVLEgMtSh+PUQzliSjV8RN4K5C+odTHuhASu3ksm0AEJvG2MhFGP8M 7IQHsxrbjThya5go4LFlsd6HRXEujtdOX6Bpy+EN3xa0iEI49ckU9Rk00Q5AA0AP y4phCjvleRmyVt28nqrq/Bbt9RN2fQ2X4Rs3s6APl3l3eV8dJAmixyl/i8OvmTbD ss3yvUhshLlhc/Ok2Jq3zM8bRPJWz5LBCqvVC1KX3cmwIxCsEoZjWGxmGhMJ+dmj 4zb5BafneuE5T+/miifkR7t7lZtqL7fdl+RVWuqcxxfg2keT1WPOW5kEp5oLldDi o7JK0XpSR1lTqRuIKKxlKb5bKKW5fmuECDW/GJ+ykooCTu6kuboU5YKl97fP6YNj 0yH3PdQeXaHkZlyBIVX7+849Feswh3mp7TQyxka/3aa2DovGn9WKmflGovHioYeZ F6rF7wjw3WvffahB5QeKdWoHStIUXWkJ0Xz2sIfSuvhThPtCnd/Nym494O5YjmSQ DV7UpOvSVus= =c1BB -----END PGP SIGNATURE-----