15 March 2019
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0846 Advisory (ICSA-19-073-01) LCDS - Leao Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA ELS Files 15 March 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: LAquis SCADA Publisher: ICS-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-6536 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-19-073-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-19-073-01) LCDS - Leao Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA ELS Files Original release date: March 14, 2019 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 7.8 o ATTENTION: Low skill level to exploit o Vendor: LCDS-Leao Consultoria e Desenvolvimento de Sistemas LTDA ME o Equipment: LAquis SCADA o Vulnerability: Out-of-Bounds Write 2. RISK EVALUATION Successful exploitation of this vulnerability could allow remote code execution. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following version of LAquis SCADA, an industrial automation software, is affected: o SCADA 184.108.40.20650 3.2 VULNERABILITY OVERVIEW 3.2.1 OUT-OF-BOUNDS WRITE CWE-787 Opening specially crafted ELS file may result in a write past the end of an allocated buffer, which may allow an attacker to execute remote code in the context of the current process. CVE-2019-6536 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Commercial Facilities, Energy, Food and Agriculture, Transportation Systems, Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED: South America o COMPANY HEADQUARTERS LOCATION: Brazil 3.4 RESEARCHER Mat Powell, working with Zero Day Initiative, reported this vulnerability to NCCIC. 4. MITIGATIONS LCDS recommends users update to Version 220.127.116.11, which can be found at the following location: https://laquisscada.com NCCIC recommends that users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. 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. This vulnerability is exploitable locally. No known public exploits specifically target this vulnerability. - --------------------------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 email@example.com 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: firstname.lastname@example.org 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 iQIVAwUBXIr8gGaOgq3Tt24GAQgKRw/+KwlAlxdvbqjWwPFj9xF3xqqOsN3116Rf 93mQscR3MyAV0ej2t1Fkvl/TY3LwtkU1i7De4/985t/Tyn+rtKAm2Iq018FXRn6E 0ryZEXkwzx75DyGJByK4vBwFHwtywEu8MJNk9AwZHZl/nDB3aRvfEGK0Kf/c0mAc AObBgB/BKQPVNXq+FtbrNOv/xAGTReKfjtib5VxK/VkPCxTHLvABcUK8Z8hZZOkt 3z0SvhE/9fKTgu1won1gUOkRah7QVQzCjq9BIgaJv02HzMAX5Md2+8rblwInEs1r lTLxTFitVb345dhq3DoLj8w23L56JLiCwatpQYy84MCpJ6ZM+re4DuVeWkB9zNqE zdlyBn0mke4ov8fYHMYUMUM6mnxFN/YBDxZ0LAbl62TNiY7QvC9jGJFNnejFnp6a /o96N9z2AhGISH+y7fKp8LouW+sCA5Q/oo1zqo+HWjhLGcYOINeTpwjvl30nKKht OSUEAynB16+u/OEw7ufA19Na0H5PMevYvHl7ibQDumCAZAzoYu/5orv6eWWcqgmD stQ06cX6IbcFjKjAo3jQ/AiiFb0dBgOfUurLslUQ4cvLMdI9Ol4kV3XtObsv7vKP NqHG5NWFK4AJiokCT6YfGRrNV9m/62ql+eVZOiEEa9W2dUVFieFhQgl/X0qenZYO CM8ymDrNinU= =klzs -----END PGP SIGNATURE-----