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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2826.2 Unitronics VisiLogic OPLC IDE Vulnerabilities 6 January 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Unitronics VisiLogic OPLC IDE Publisher: US-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-7939 CVE-2015-7905 CVE-2015-6478 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-15-274-02A Revision History: January 6 2016: Added details for CVE-2015-7939, updated references November 16 2015: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-15-274-02) Unitronics VisiLogic OPLC IDE Vulnerabilities (Update A) Original release date: November 12, 2015 | Last revised: January 05, 2016 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/. OVERVIEW This advisory was originally posted to the US-CERT secure Portal library on November 3, 2015, and is being released to the NCCIC/ICS-CERT web site. HPs Zero Day Initiative (ZDI) reported to ICS-CERT that Steven Seeley of Source Incite, Fritz Sands of ZDI, and Andrea Micalizzi discovered vulnerabilities in Unitronics VisiLogic OPLC IDE. Unitronics has produced an updated package to mitigate these vulnerabilities. These vulnerabilities could be exploited remotely. AFFECTED PRODUCTS Unitronics reports that the vulnerabilities affect the following products: Unitronics VisiLogic OPLC IDE Version 9.8.0.00 and previous. IMPACT A successful exploit of these vulnerabilities could lead to remote code execution. Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation. BACKGROUND Unitronics has offices in the United States and Israel and sells products through partners worldwide. Unitronics VisiLogic OPLC IDE is an HMI and PLC application programming environment for Vision and SAMBA series controllers. According to Unitronics, these products are used worldwide in multiple sectors. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW UNSAFE ACXTIVEX CONTROL MARKED SAFE FOR SCRIPTING [a] Several instances exist where ActiveX control should be restricted and have been marked as safe-for-scripting. CVE-2015-6478 [b] has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). [c] CODE INJECTION [d] There are several instances where an external input can change the behavior of the target application. CVE-2015-7905 [e] has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L). [f] - --------- Begin Update A Part 1 of 2 -------- CODE INJECTION [g] When parsing a specific file, the length of the filename is not validated, resulting in a heap-based buffer overflow. CVE-2015-7939 [h] has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). [i] - --------- End Update A Part 1 of 2 -------- VULNERABILITY DETAILS EXPLOITABILITY These vulnerabilities could be exploited remotely. EXISTENCE OF EXPLOIT No known public exploits specifically target these vulnerabilities. DIFFICULTY An attacker with a medium skill would be able to exploit these vulnerabilities. MITIGATION - --------- Begin Update A Part 2 of 2 -------- Unitronics has released an updated package, VisiLogic V9.8.09, to address these vulnerabilities. The new package can be found at the following location on its web site: http://www.unitronics.com/support/downloads (link is external) - --------- End Update A Part 2 of 2 -------- 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 at: http://ics-cert.us-cert.gov/content/recommended-practices. 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 (http://ics-cert.us-cert.gov/). 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. a. CWE-623: Unsafe ActiveX Control Marked Safe For Scripting, http://cwe.mitre.org/data/definitions/623.html, web site last accessed November 12, 2015. b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-6478, web site last accessed January 5, 2016. c. CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., web site last accessed November 12, 2015. d. CWE-94: Improper Control of Generation of Code ('Code Injection'), http://cwe.mitre.org/data/definitions/94.html, web site last accessed November 12, 2015. e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7905, web site last accessed January 5, 2016. f. CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., web site last accessed November 12, 2015. g. CWE-94: Improper Control of Generation of Code ('Code Injection'), http://cwe.mitre.org/data/definitions/94.html, web site last accessed January 05, 2016. h. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7939, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. i. CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., web site last accessed January 05, 2016. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov 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 ICS-CERT 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. 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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 iQIVAwUBVoyfj36ZAP0PgtI9AQIF8hAAyDhRk9lXDsJ/9KLa2hy637kTRYvwviw3 oujLaLxT3VbGou8XUaavnRxrzmuVLOp2bWG1tUB0KWj9jVr4/2u4S0SA5eZt8Vno sFejXceRkbgaetTYqsblc8Yq0o+7VeVobMciSTIWptl78Zsy0Qe5XSCiehOh2vlO jCH87nDsDp+xHYaNpKU+kvOda/OewLpfgBMiS6lmqGPF9Yyxmo1bJJjWyZBSAXoa mdV4D6H40pv8BFQ+24J/MlJq7+mnudLskbMuls4DTXo6pZTyeDzBiYiNdVLCFdkj KhG0iQ/neOvJ5aX69EdJ4jcEVtJ00I9UrYNoW0tzfp2iDoXq9Ub72jzjy6UYZeMt 9YW6tb03ZIdzrwRJ8gIrx3o+OZNaRecC1m8+S/iqS/mqUvaet8AFYTLIZL1LRZ0p qpkcgoik8xtlekXXPS+VxZlUA54iB477oGncQGyFSR/6N3ofcFxZFqXJqC4osy/7 we9ouXLeSMqHpJH8eQ/SyKRw+ERZOQDFmFZ5iSshKajKhDcXlIQ8ilb4cFpkQQko yfbyG2rJT6y98RUwNCUhJ0lJovTbjlF35zZgFI9wT7nOyu/AEAhZiiA3Rr6/c0pa MeKMHoipCF9SdkV/xQgIezMiC56HPvoECBuiDG2WBG5GER2Nwd6JuGQpgE0af8Uq 5dKk+UfqCjs= =yNOA -----END PGP SIGNATURE-----