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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2972 Delta Electronics WPLSoft, ISPSoft, and PMSoft Vulnerabilities 14 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WPLSoft ISPSoft PMSoft Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2016-5805 CVE-2016-5802 Original Bulletin: http://ics-cert.us-cert.gov/advisories/ICSA-16-348-03 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-16-348-03) Delta Electronics WPLSoft, ISPSoft, and PMSoft Vulnerabilities Original release date: December 13, 2016 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 Researchers axt and Ariele Caltabiano each working with Trend Micro's Zero Day Initiative (ZDI) have identified vulnerabilities in Delta Electronics WPLSoft, ISPSoft, and PMSoft software applications. Delta Electronics has produced new software versions to mitigate these vulnerabilities. AFFECTED PRODUCTS The following Delta Electronics products and versions are affected: WPLSoft, Versions prior to V2.42.11, ISPSoft, Versions prior to 3.02.11, and PMSoft, Versions prior to2.10.10 IMPACT Successful exploitation of these vulnerabilities may allow an attacker to execute arbitrary code. Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation. BACKGROUND Delta Electronics is a Taiwan-based company that maintains offices in several countries around the world, including China, Japan, South Korea, Singapore, India, Brazil, and the US. The affected products, WPLSoft, ISPSoft, and PMSoft, are platforms for editing the control software of Delta DVP series motion controlling programmable logic controllers (PLCs). According to Delta Electronics, these platforms are used to prepare process control systems (PCSs) for deployment across a variety of industrial automation environments within the Critical Manufacturing Sector. Delta Electronics estimates that these products are used primarily in ASIA and Europe with a small percentage in the US. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW HEAP-BASED BUFFER OVERFLOW[a] There are multiple instances of heap-based buffer overflows that may allow malicious files to cause the execution of arbitrary code or a denial of service. CVE-2016-5805[b] has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).[c] OUT-OF-BOUNDS WRITE[d] Multiple instances of out-of-bounds conditions may allow malicious files to be read and executed by the affected software. CVE-2016-5802[e] has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).[f] VULNERABILITY DETAILS EXPLOITABILITY These vulnerabilities are not exploitable remotely and cannot be exploited without user interaction. These exploits are triggered when a local user runs the vulnerable application and loads malformed files with .dvp or other extensions. EXISTENCE OF EXPLOIT No known public exploits specifically target these vulnerabilities in these products. DIFFICULTY Crafting a working exploit for these vulnerabilities would be difficult. Social engineering is required to convince the user to accept the malformed file. Additional user interaction is needed to load the malformed file. This decreases the likelihood of a successful exploit. MITIGATION Delta Electronics recommends affected users update their software to the latest versions ISPSoft V3.02.11, PMSoft V2.10.10, and WPLSoft V2.42.11 that are available through the following links: ISPSoft V3.02.11 http://www.deltaww.com/filecenter/Products/download/06/060301/Software/DELTA_IA-PLC_ISPSoft-V3-02-11_SW_20161115.zip PMSoft V2.10.10 http://www.deltaww.com/filecenter/Products/download/06/060301/Software/DELTA_IA-PLC_PMSoft-V2-10-10_SW_20161115.zip WPLSoft V2.42.11 http://www.deltaww.com/filecenter/Products/download/06/060301/Software/DELTA_IA-PLC_WPLSoft-V2-42-11_SW_20161115.zip ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks: Do not click web links or open unsolicited attachments in email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacksfor more information on social engineering attacks. 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-122: Heap-based Buffer Overflow, http://cwe.mitre.org/data/definitions/122.html, web site last accessed December 13, 2016. b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5805, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. c. CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S..., web site last accessed December 13, 2016. d. CWE-787: Out-of-Bounds Write, https://cwe.mitre.org/data/definitions/787.html, web site last accessed December 13, 2016. e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5802, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. f. CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S..., web site last accessed December 13, 2016. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov (link sends e-mail) 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. 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. 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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 iQIVAwUBWFHce4x+lLeg9Ub1AQg2yA/9HddTstQbF73IaQz2SM2YHsNvcjixX6As HjulXVJWRC/PutFFl9ZKBFJPkPFR2WCPojnu9R86mD2pT5Az9jz1/a7NwhZItnPd omUp+NA4fUrv6PVBFuigAUev9HbIqBG0rPcUKbhK9uu2C3nnos05v3FCLCGRGnxD E4bX+Cc9g1rTQe9RMvi39Fx5uJPGqRImo/f0b+eX+x2nH+qlHEJHb9NMXd8iIm29 GgroLgY/2h8+b5obAOq9EGnOoln4lQ6WaEENuQKK2z9Ypl/RGM+OSJdU8ObJNujs q+ONpReX/A6n09hfZNJiirYkGsNj+RRVkKujxmgyIDsOIjXzAfN+9Cu60gRADAg/ Gwaq9/3OvsoljsrELk5JYMyYOjrRrMooHFdm55ayq7q9xmbtw8y/tift9uQFgfT0 AiItm2vhniYc1ZukXc1gYUxCR2/oHb4Gfx7lQlKCczl9XRJJT7UnWsvAUEa9GjbE tecxlE6STk6Bbw9PCLqlrnkkuMb9jFzOHsAlJIfDqg+Aq3M93E7yKi8RwseMAnws FImie6iHH5T/XZ+f+zOHGjXp5EwOzT4eCpS8dhBcrL1w1tyMNjC4LGMvujSymZc3 9+7dUkzjEkH//SvwTm8deXWzIPcyXmLfHFmUCA2TlEhSm9OaByx9zCp/qB6gXjn5 bZyfB5hxOTo= =tmKf -----END PGP SIGNATURE-----