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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2339 Advisory (ICSA-17-257-01) LOYTEC LVIS-3ME 15 September 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: LVIS-3ME Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Access Privileged Data -- Existing Account Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-13998 CVE-2017-13996 CVE-2017-13994 CVE-2017-13992 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-257-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-257-01) LOYTEC LVIS-3ME Original release date: September 14, 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 8.1 ATTENTION: Remotely exploitable/low skill level to exploit. Vendor: LOYTEC Equipment: LVIS-3ME Vulnerabilities: Relative Path Traversal, Insufficient Entropy, Cross-site Scripting, Insufficiently Protected Credentials AFFECTED PRODUCTS The following versions of LVIS-3ME, an HMI Touch Panel, are affected: LVIS-3ME versions prior to 6.2.0 IMPACT Successful exploitation of these vulnerabilities may result in information exposure or allow arbitrary code execution. MITIGATION LOYTEC has released a firmware update, V6.2.0, to address these vulnerabilities. LOYTEC recommends that users update to the latest firmware update which is available by accessing an account at the following location: https://www.loytec.com/support/download/ (link is external) NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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. In addition, ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks: 1.Do not click web links or open unsolicited attachments in email messages. 2.Refer to Recognizing and Avoiding Email Scamsfor more information on avoiding email scams. 3.Refer to Avoiding Social Engineering and Phishing Attacksfor more information on social engineering attacks. No known public exploits specifically target these vulnerabilities. These vulnerabilities are remotely exploitable. Low skill level is needed to exploit. VULNERABILITY OVERVIEW RELATIVE PATH TRAVERSAL CWE-23 The web user interface fails to prevent access to critical files that non administrative users should not have access to, which could allow an attacker to create or modify files or execute arbitrary code. CVE-2017-13996 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L). INSUFFICIENT ENTROPY CWE-331 The application does not utilize sufficiently random number generation for the web interface authentication mechanism, which could allow remote code execution. CVE-2017-13992 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79 The web interface lacks proper web request validation, which could allow XSS attacks to occur if an authenticated user of the web interface is tricked into clicking a malicious link. CVE-2017-13994 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L). INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522 The application does not sufficiently protect sensitive information from unauthorized access. CVE-2017-13998 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Davy Douhine of RandoriSec reported the vulnerabilities to ICS-CERT. BACKGROUND Critical Infrastructure Sectors: Critical Manufacturing, Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Austria - --------------------------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). 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