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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2976 Advisory (ICSA-18-275-03) Entes EMG 12 3 October 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: EMG12 Ethernet Modbus Gateway Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-14826 CVE-2018-14822 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-18-275-03 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-18-275-03) Entes EMG 12 Original release date: October 02, 2018 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/. 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Entes o Equipment: EMG 12 o Vulnerabilities: Improper Authentication, Information Exposure Through Query Strings in GET Request 2. RISK EVALUATION Successful exploitation of these vulnerabilities may allow attackers to gain unauthorized access and could allow the ability to change device configuration and settings. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of EMG 12, an Ethernet Modbus Gateway, are affected: o EMG12 Ethernet Modbus Gateway Firmware Version 2.57 and prior. 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER AUTHENTICATION CWE-287 The application uses a web interface where it is possible for an attacker to bypass authentication with a specially crafted URL. This could allow for remote code execution. CVE-2018-14826 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H /I:H/A:H). 3.2.2 INFORMATION EXPOSURE THROUGH QUERY STRINGS IN GET REQUEST CWE-598 An information exposure through query strings vulnerability in the web interface has been identified, which may allow an attacker to impersonate a legitimate user and execute arbitrary code. CVE-2018-14822 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H /I:H/A:N). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Turkey 3.4 RESEARCHER Can Demirel of Biznet Bilisim reported this vulnerability to NCCIC. 4. MITIGATIONS Entes recommends that users update to the latest available firmware version. This can be requested by calling, tel:+902163130110 or by email at teknikdestek@entes.com.tr NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o 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. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC 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 on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. Contact Information For any questions related to this report, please contact the NCCIC at: Email: NCCICCUSTOMERSERVICE@hq.dhs.gov 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 iQIVAwUBW7Q4nmaOgq3Tt24GAQiR/xAAv+ur7xDxNdkK1DcnohwFLdgE4I/ZHwZK 4/z0brY9A5mAIjqP0XxjpH6BL/56BLNgPSqXy0sjwGmjLHPJ8kx6yNxiy++K4jod aHB+gietUaZFSBY9HPnGWUWmSq5d7gNp7u3RQiNwaeCDh8vMjMmyxItCPn+qfqT+ UBaJalfQneQV4Qmwn+83E4rbe2veGyW4tuUsCJuERTT/sG7uFQLAtTMik2EvmqoH OcImUdMNbZnc4tserM/AmME9RVoSO+8XK1A/vY8X4jPN1+8OmvcR1/GvL3vFOqj5 NeCRhW6FDFlLC+kLpbuPLRrLAdB7MQXk4BsZspLLAAM53JSLrJELysW9tG+2MbVD GaucTlt2vRSim2SbDgKKOam3AYyYF8/FTsMwfij8wdlBDu1VdSaKb/nIJWAzT7Sv gEz0hx88H73KRIr0ehHgbvMxvHKYjp4AvrHGAUn0Bhx53gY4viVn24u0zk7H1QnP 0a7CzxbaVvHAjX0T6TlyHgOvVwynOchfGz+CD1xIzXgYNRAu7WT++9hAk8n8FOkD OlJ9NwVSLpfK4rJRRrW9Emul+dbVPl11k+Mdc7U6cZDaR1fUxDpaCTk3tLkrlFRb g7XA6mtD39VdsbGD3NaYERgONBKbFA7GDrIMt2hbAnp4EyRzgZM6kwXt/q7B6hmh ixrN077XJr8= =HUf2 -----END PGP SIGNATURE-----