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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2851 Advantech SUSIAccess Server Vulnerabilities 5 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Advantech SUSIAccess Server Publisher: ICS-CERT Operating System: Windows Impact/Access: Increased Privileges -- Console/Physical Create Arbitrary Files -- Remote with User Interaction Access Confidential Data -- Remote/Unauthenticated Resolution: Alternate Program CVE Names: CVE-2016-9353 CVE-2016-9351 CVE-2016-9349 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-16-336-04 Comment: Advantech no longer supports SUSIAccess. They have developed WISE-PaaS/RMM to replace it. - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-16-336-04) Advantech SUSIAccess Server Vulnerabilities Original release date: December 01, 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 Researcher rgod working with Zero Day Initiative (ZDI) has identified an information disclosure, a directory traversal, and a privilege escalation vulnerability in Advantechs SUSIAccess Server. Advantech has produced new software to mitigate these vulnerabilities. These vulnerabilities could be exploited remotely. AFFECTED PRODUCTS The following SUSIAccess Server versions are affected: SUISAccess Server Version 3.0 and prior. IMPACT Successful exploitation of these vulnerabilities may result in file manipulation or arbitrary code execution. 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 Advantech is a Taiwan-based company with distribution offices in 21 countries worldwide. The affected product, SUSIAccess Server, is a platform as a service (PaaS) for cloud and Internet of Things (IoT) devices. According to Advantech, SUSIAccess Server is deployed across several sectors including Commercial Facilities, Critical Manufacturing, Energy, and Government Facilities. Advantech estimates that this product is used worldwide. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW INFORMATION EXPOSURE[a] An attacker could traverse the file system and extract files that can result in information disclosure. CVE-2016-9349[b] 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:L/PR:N/UI:N/S:U/C:H/I:N/A:N).[c] PATH TRAVERSAL[d] The directory traversal/file upload error allows an attacker to upload and unpack a zip file. CVE-2016-9351[e] has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H).[f] PERMISSIONS, PRIVILEGES, AND ACCESS CONTROLS[g] The admin password is stored in the system and is encrypted with a static key hard-coded in the program. Attackers could reverse the admin account password for use. CVE-2016-9353[h] has been assigned to this vulnerability. A CVSS v3 base score of 8.4 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[i] 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 low skill would be able to exploit these vulnerabilities. MITIGATION Advantech no longer supports SUSIAccess. They have developed WISE-PaaS/RMM to replace it. To coordinate the purchase of the new software, users should contact Advantech at: http://www.advantech.com/contact/inquiryrequestform?subject=price%2band%2bquotation (link is external) 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 ICS-CERT 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. a. CWE-200:Information Exposure, https://cwe.mitre.org/data/definitions/200.html, web site last accessed December 01, 2016. b. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9349, 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:N/AC:L/PR:N/UI:N/S..., web site last accessed December 01, 2016. d. CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), https://cwe.mitre.org/data/definitions/22.html, web site last accessed December 01, 2016. e. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9351, 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:N/AC:H/PR:L/UI:R/S..., web site last accessed December 01, 2016. g. CWE-264: Permissions, Privileges, and Access Controls, https://cwe.mitre.org/data/definitions/264.html, web site last accessed December 01, 2016. h. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9353, 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:L/AC:L/PR:N/UI:N/S..., web site last accessed December 01, 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. 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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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