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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1385 Advisory (ICSA-19-113-01) Rockwell Automation MicroLogix 1400 and CompactLogix 5370 Controllers 24 April 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Rockwell Automation MicroLogix 1400 Rockwell Automation CompactLogix 5370 Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-10955 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-19-113-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-19-113-01) Rockwell Automation MicroLogix 1400 and CompactLogix 5370 Controllers Original release date: April 23, 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 7.1 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Rockwell Automation o Equipment: MicroLogix 1400 and CompactLogix 5370 Controllers o Vulnerability: Open Redirect 2. RISK EVALUATION Successful exploitation of this vulnerability could allow a remote unauthenticated attacker to input a malicious link redirecting users to a malicious website. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Rockwell Automation products are affected: o MicroLogix 1400 Controllers Series A, All Versions Series B, v15.002 and earlier o MicroLogix 1100 Controllers v14.00 and earlier o CompactLogix 5370 L1 controllers v30.014 and earlier o CompactLogix 5370 L2 controllers v30.014 and earlier o CompactLogix 5370 L3 controllers (includes CompactLogix GuardLogix controllers) v30.014 and earlier 3.2 VULNERABILITY OVERVIEW 3.2.1 URL REDIRECTION TO UNTRUSTED SITE ('OPEN REDIRECT') CWE-601 An open redirect vulnerability could allow a remote unauthenticated attacker to input a malicious link to redirect users to a malicious site that could run or download arbitrary malware on the user's machine. CVE-2019-10955 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C/ C:L/I:L/A:L ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Josiah Bryan and Geancarlo Palavicini reported this vulnerability to NCCIC. 4. MITIGATIONS Rockwell Automation has released a security advisory with mitigation steps that can be found at: https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1086288 (Login required) Rockwell Automation recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Update to the latest available firmware revision that addresses the associated risk. o Use trusted software, software patches, anti-virus/anti-malware programs, and interact only with trusted websites and attachments. 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 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. VPN is only as secure as the connected devices. o Employ training and awareness programs to educate users on the warning signs of a phishing or social engineering attack. 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. NCCIC also 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. 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 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 iQIVAwUBXL/XpGaOgq3Tt24GAQgcPA/8C8zJGocD1ym79Ci23pzLPVJMINs2l48+ sDxIByFFHCtmbNDylQExQE1YX68U7D/sTzgphvqoPNo3VK2QmQtdOdTOOOMHmJ+F m1lK+vxTEvnpj2dFm5Jbn1hu0QAoOYbtv+3Jyzbev4lYVMhUnS3bm3BeVfGVDSh2 CNXUnUhCGhno+H5UYp2u/wMc3HO2LnCaM4U41Pp9IzO2mhWt7BEHgoLpUlsfgcIJ oKEeJdaeVfAOGLwKWrEIS4YvGwwo4LDodCGEHtxX4SHrqbc1LFCu4442vGWjwOpR QmGMZ2Mbc7jczjuBlhdR0kBErtXxHfOrys02JoRq2BLeJOedVTc0uQIGi4zDOOQJ uyMurxQVF5txUzWTwtOvUw+Khk70J309hMK2QJHdoLFs8fvHSA7GhDVaPOnJTkO6 oUe8+Oel+f4i6s7Z822voFuKxTIS6dN+WOdnD4Sqyo6Ub8OXGa0QoeUPMIWXKAwE a1KyTOKUndWFy4lJ0E9uOPAc1neBhqxzglhYSsJnHDTXbrZB1WonuGI3MQVWbBpo 7hyO4H7sKDHJnIF24VuKDoDReI3lRVRcdjqK2sbOedIho4V1KBR/00xFOiq4eczO VznngoLG322NN5ok+lUoGKBsYqi/4VDBjNtDdg84VtHXLzHwppGWFdydNQ3fIA+V qsVT/8/if5M= =3lvy -----END PGP SIGNATURE-----